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<title>English Engineering Units</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">English Engineering Units</span></span>

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<p>

Some fields of <a href="Engineering" title="Engineering">engineering</a> in the United States use a system of measurement of physical quantities known as the <b>English Engineering Units</b>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Despite its name, the system is based on <a href="United_States_customary_units" title="United States customary units">United States customary units</a> of measure.

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<div class="mw-heading mw-heading2"><h2 id="Definition">Definition</h2></div>

<p>The English Engineering Units is a system of units used in the United States. The set is defined by the following units,<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> and <a href="International_yard_and_pound" title="International yard and pound">definitive conversions</a> to the <a href="International_System_of_Units" title="International System of Units">International System of Units</a>.<sup id="cite_ref-Standards1959_4-0" class="reference"><a href="#cite_note-Standards1959-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

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<th>Dimension

</th>

<th>English Engineering Unit

</th>

<th>SI unit

</th>

<th>Unit conversion (of intervals)

</th></tr>

<tr>

<td><a href="Second" title="Second">second</a> (s)</td>

<td>second (s)</td>

<td>1 s

</td></tr>

<tr>

<td><a href="Length" title="Length">length</a></td>

<td><a href="Metre" title="Metre">metre</a> (m)</td>

<td>0.3048 m

</td></tr>

<tr>

<td><a href="Pound_(mass)" title="Pound (mass)">pound mass</a> (lb)</td>

<td><a href="Kilogram" title="Kilogram">kilogram</a> (kg)</td>

</td></tr>

<tr>

<td><a href="Force" title="Force">force</a></td>

<td><a href="Pound-force" class="mw-redirect" title="Pound-force">pound-force</a> (lbf)</td>

<td><a href="Newton_(unit)" title="Newton (unit)">newton</a> (N)</td>

</td></tr>

<tr>

<td><a href="Temperature" title="Temperature">temperature</a></td>

<td>degree <a href="Fahrenheit" title="Fahrenheit">Fahrenheit</a> (°F)</td>

<td>degree <a href="Celsius" title="Celsius">Celsius</a> (°C)</td>

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</style><span class="sfrac">⁠<span class="tion"><span class="num">5</span><span class="sr-only">/</span><span class="den">9</span></span>⁠</span> °C<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup>

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<td><a href="Absolute_temperature" class="mw-redirect" title="Absolute temperature">absolute temperature</a></td>

<td>degree <a href="Rankine_scale" title="Rankine scale">Rankine</a> (°R)</td>

<td><a href="Kelvin" title="Kelvin">kelvin</a> (K)</td>

<td><span class="sfrac">⁠<span class="tion"><span class="num">5</span><span class="sr-only">/</span><span class="den">9</span></span>⁠</span> K

</td></tr></tbody></table>

<p>Units for other physical quantities are derived from this set as needed.

</p><p>In English Engineering Units, the pound-mass and the pound-force are distinct base units, and <a href="Newton's_second_law_of_motion" class="mw-redirect" title="Newton's second law of motion">Newton's second law of motion</a> takes the form <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle F=m{\frac {a}{g_{\mathrm {c} }}}}">

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<annotation encoding="application/x-tex">{\displaystyle F=m{\frac {a}{g_{\mathrm {c} }}}}</annotation>

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</math></span><img src="./00a132b7433d2915df5ad620a0c67180ab4212b0.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:9.787ex; height:5.176ex;" alt="{\displaystyle F=m{\frac {a}{g_{\mathrm {c} }}}}" loading="lazy"></span> where <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a}">

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<annotation encoding="application/x-tex">{\displaystyle a}</annotation>

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</math></span><img src="./ffd2487510aa438433a2579450ab2b3d557e5edc.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.23ex; height:1.676ex;" alt="{\displaystyle a}" loading="lazy"></span> is the acceleration in ft/s<sup>2</sup> and <span class="texhtml"><var style="padding-right: 1px;">g</var><sub>c</sub> = 32.174 lb·ft/(lbf·s<sup>2</sup>)</span>.

</p>

<div class="mw-heading mw-heading2"><h2 id="History_and_etymology">History and etymology</h2></div>

<p>The term <a href="English_units" title="English units">English units</a> strictly refers to the system used in England until 1826, when it was replaced by (more rigorously defined) <a href="Imperial_units" title="Imperial units">imperial units</a>. The United States continued to use the older definitions until the <a href="Mendenhall_Order" title="Mendenhall Order">Mendenhall Order</a> of 1893, which established the United States customary units. Nevertheless, the term "English units" persisted in common speech and was adapted as "English engineering units" but these are based on US customary units rather than the pre-1826 English system.

</p>

<div class="mw-heading mw-heading3"><h3 id="British_Engineering_Units">British Engineering Units</h3></div>

<p>A similar system, termed <b>British Engineering Units</b> by Halliday and Resnick (1974), is a system that uses the <a href="Slug_(unit)" title="Slug (unit)">slug</a> as the unit of mass, and in which Newton's law retains the form <span class="texhtml"><var style="padding-right: 1px;">F</var><span class="nowrap"> </span>=<span class="nowrap"> </span><var style="padding-right: 1px;">m</var><var style="padding-right: 1px;">a</var></span>.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Modern British engineering practice has used <a href="SI_base_unit" title="SI base unit">SI base units</a> since at least the late 1970s.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

</p>

<ul><li><a href="Imperial_and_US_customary_measurement_systems" title="Imperial and US customary measurement systems">Imperial and US customary measurement systems</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2></div>

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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">A specific temperature is converted from Fahrenheit to Celsius by the formula <span class="mwe-math-element mwe-math-element-inline"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \{T\}_{\mathrm {^{\circ }C} }={\tfrac {5}{9}}(\{T\}_{\mathrm {^{\circ }F} }-32)}">

<msub>

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</msup>

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<annotation encoding="application/x-tex">{\displaystyle \{T\}_{\mathrm {^{\circ }C} }={\tfrac {5}{9}}(\{T\}_{\mathrm {^{\circ }F} }-32)}</annotation>

</semantics>

</math></span><img src="./a3951758b07827ee265fadb75000cef4c8558f43.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.338ex; width:24.041ex; height:3.676ex;" alt="{\displaystyle \{T\}_{\mathrm {^{\circ }C} }={\tfrac {5}{9}}(\{T\}_{\mathrm {^{\circ }F} }-32)}" loading="lazy"></span></span>

</li>

</ol></div></div>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFComings1940" class="citation journal cs1">Comings, E. W. (1940). "English Engineering Units and Their Dimensions". <i>Industrial and Engineering Chemistry</i>. <b>32</b> (7): <span class="nowrap">984–</span>987. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fie50367a028">10.1021/ie50367a028</a>.</cite></span>

</li>

<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFKlinkenberg1969" class="citation journal cs1">Klinkenberg, Adrian (1969). "The American Engineering System of Units and Its Dimensional Constant g<sub>c</sub>". <i>Industrial and Engineering Chemistry</i>. <b>61</b> (4): <span class="nowrap">53–</span>59. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021%2Fie50712a010">10.1021/ie50712a010</a>.</cite></span>

</li>

<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite id="CITEREFR._Zucker,_O._Biblarz2002" class="citation book cs1">R. Zucker, O. Biblarz (2002). <i>Fundamentals of Gas Dynamics</i>. Hoboken, New Jersey: John Wiley & Sons, Inc. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-471-05967-6</bdi>.</cite></span>

</li>

<li id="cite_note-Standards1959-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-Standards1959_4-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFUnited_States._National_Bureau_of_Standards1959" class="citation book cs1"><a href="National_Institute_of_Standards_and_Technology" title="National Institute of Standards and Technology">United States. National Bureau of Standards</a> (1959). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=4aWN-VRV1AoC&pg=PA13"><i>Research Highlights of the National Bureau of Standards</i></a>. U.S. Department of Commerce, National Bureau of Standards. p. 13<span class="reference-accessdate">. Retrieved <span class="nowrap">31 July</span> 2019</span>.</cite></span>

</li>

<li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><cite id="CITEREFHallidayResnick1974" class="citation book cs1"><a href="David_Halliday_(physicist)" title="David Halliday (physicist)">Halliday, David</a>; <a href="Robert_Resnick" title="Robert Resnick">Resnick, Robert</a> (1974). <i>Fundamentals of Physics</i> (revised printing ed.). New York: Wiley. pp. 35, <span class="nowrap">68–</span>69.</cite></span>

</li>

<li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://www.railwaysarchive.co.uk/documents/DoT_ElectrificationBlueBook1977.pdf"><i>Railway Construction and Operation Requirements – Structural and Electrical Clearances</i></a> <span class="cs1-format">(PDF)</span>. London: <a href="Department_of_Transport" class="mw-redirect" title="Department of Transport">Department of Transport</a>. 1977. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-11-550443-5</bdi><span class="reference-accessdate">. Retrieved <span class="nowrap">29 March</span> 2012</span>. <q><b>1.2</b><span class="nowrap"> </span>These new sections represent the first stage of a complete revision and metrication of the 'Railway Construction and Operation Requirements for Passenger Lines and Recommendations for Goods Lines of the Minister of Transport', 1950 (Reprinted 1970). They are published separately in advance of the complete revision because of the urgent need for an up-to-date metric guide to the Department's requirements for clearances, both structural and electrical.</q></cite></span>

</li>

</ol></div></div>

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</style><div id="Systems_of_measurement98" style="font-size:114%;margin:0 4em"><a href="System_of_measurement" class="mw-redirect" title="System of measurement">Systems of measurement</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Current</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em">General</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="International_System_of_Units" title="International System of Units">International System of Units (SI)</a></li>

<li><a href="Imperial_units" title="Imperial units">UK imperial system</a></li>

<li><a href="United_States_customary_units" title="United States customary units">US customary units (USCS/USC)</a></li>

<li><a href="Chinese_units_of_measurement" title="Chinese units of measurement">Chinese</a>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Specific</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Apothecaries'_system" title="Apothecaries' system">Apothecaries'</a></li>

<li><a href="Avoirdupois_system" class="mw-redirect" title="Avoirdupois system">Avoirdupois</a></li>

<li><a href="Astronomical_system_of_units" title="Astronomical system of units">Astronomical</a></li>

<li><a href="Conventional_electrical_unit" title="Conventional electrical unit">Electrical</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="Natural_units" title="Natural units">Natural</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Atomic_units" title="Atomic units">Atomic</a></li>

<li><a href="Geometrized_unit_system" title="Geometrized unit system">Geometrised</a></li>

<li><a href="Heaviside%E2%80%93Lorentz_units" title="Heaviside–Lorentz units">Heaviside–Lorentz</a></li>

<li><a href="Planck_units" title="Planck units">Planck</a></li>

<li><a href="Natural_units#Quantum_chromodynamics_units" title="Natural units">Quantum chromodynamical</a></li>

<li><a href="Stoney_units" title="Stoney units">Stoney</a></li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Background</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em">Metric</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Metric_system" title="Metric system">Overview</a></li>

<li><a href="Outline_of_the_metric_system" title="Outline of the metric system">Outline</a></li>

<li><a href="History_of_the_metric_system" title="History of the metric system">History</a></li>

<li><a href="Metrication" title="Metrication">Metrication</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">UK/US</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Imperial_and_US_customary_measurement_systems" title="Imperial and US customary measurement systems">Overview</a></li>

<li><a href="Comparison_of_the_imperial_and_US_customary_measurement_systems" title="Comparison of the imperial and US customary measurement systems">Comparison</a></li>

<li><a href="Foot%E2%80%93pound%E2%80%93second_system" class="mw-redirect" title="Foot–pound–second system">Foot–pound–second</a> (FPS)</li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historic</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em">Metric</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="MKS_system_of_units" class="mw-redirect" title="MKS system of units">metre–kilogram–second</a> (MKS)</li>

<li><a href="Metre%E2%80%93tonne%E2%80%93second_system_of_units" title="Metre–tonne–second system of units">metre–tonne–second</a> (MTS)</li>

<li><a href="Centimetre%E2%80%93gram%E2%80%93second_system_of_units" title="Centimetre–gram–second system of units">centimetre–gram–second</a> (CGS)</li>

<li><a href="Gravitational_metric_system" title="Gravitational metric system">gravitational</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Europe</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Old_Cornish_units_of_measurement" title="Old Cornish units of measurement">Cornish</a></li>

<li><a href="Cypriot_units_of_measurement" title="Cypriot units of measurement">Cypriot</a></li>

<li><a href="Czech_units_of_measurement" title="Czech units of measurement">Czech</a></li>

<li><a href="Danish_units_of_measurement" title="Danish units of measurement">Danish</a></li>

<li><a href="Dutch_units_of_measurement" title="Dutch units of measurement">Dutch</a></li>

<li><a href="English_units" title="English units">English</a>

<ul><li><a href="Winchester_measure" title="Winchester measure">Winchester</a></li>

<li><a href="Exchequer_Standards" title="Exchequer Standards">Exchequer</a></li></ul></li>

<li><a href="Estonian_units_of_measurement" title="Estonian units of measurement">Estonian</a></li>

<li><a href="Obsolete_Finnish_units_of_measurement" title="Obsolete Finnish units of measurement">Finnish</a></li>

<li><a href="French_units_of_measurement" title="French units of measurement">French</a>

<ul><li><a href="Traditional_French_units_of_measurement" title="Traditional French units of measurement">Traditional</a></li>

<li><a href="Mesures_usuelles" title="Mesures usuelles">Mesures usuelles</a></li></ul></li>

<li><a href="Obsolete_German_units_of_measurement" class="mw-redirect" title="Obsolete German units of measurement">German</a></li>

<li><a href="Greek_units_of_measurement" title="Greek units of measurement">Greek</a>

<ul><li><a href="Byzantine_units_of_measurement" title="Byzantine units of measurement">Byzantine</a></li></ul></li>

<li><a href="Hungarian_units_of_measurement" title="Hungarian units of measurement">Hungarian</a></li>

<li><a href="Icelandic_units_of_measurement" title="Icelandic units of measurement">Icelandic</a></li>

<li><a href="Old_Irish_units_of_measurement" class="mw-redirect" title="Old Irish units of measurement">Irish</a></li>

<li><a href="Italian_units_of_measurement" title="Italian units of measurement">Italian</a></li>

<li><a href="Latvian_units_of_measurement" title="Latvian units of measurement">Latvian</a></li>

<li><a href="Luxembourgian_units_of_measurement" class="mw-redirect" title="Luxembourgian units of measurement">Luxembourgian</a></li>

<li><a href="Maltese_units_of_measurement" title="Maltese units of measurement">Maltese</a></li>

<li><a href="Norwegian_units_of_measurement" title="Norwegian units of measurement">Norwegian</a></li>

<li><a href="Ottoman_units_of_measurement" title="Ottoman units of measurement">Ottoman</a></li>

<li><a href="Polish_units_of_measurement" title="Polish units of measurement">Polish</a></li>

<li><a href="Portuguese_units_of_measurement" title="Portuguese units of measurement">Portuguese</a></li>

<li><a href="Romanian_units_of_measurement" title="Romanian units of measurement">Romanian</a></li>

<li><a href="Obsolete_Russian_units_of_measurement" class="mw-redirect" title="Obsolete Russian units of measurement">Russian</a></li>

<li><a href="Scottish_units" title="Scottish units">Scottish</a></li>

<li><a href="Obsolete_Serbian_units_of_measurement" title="Obsolete Serbian units of measurement">Serbian</a></li>

<li><a href="Slovak_units_of_measurement" title="Slovak units of measurement">Slovak</a></li>

<li><a href="Spanish_units_of_measurement" title="Spanish units of measurement">Spanish</a></li>

<li><a href="Swedish_units_of_measurement" title="Swedish units of measurement">Swedish</a></li>

<li><a href="Swiss_units_of_measurement" title="Swiss units of measurement">Swiss</a></li>

<li><a href="Welsh_units" title="Welsh units">Welsh</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Asia</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Afghan_units_of_measurement" title="Afghan units of measurement">Afghan</a></li>

<li><a href="Cambodian_units_of_measurement" title="Cambodian units of measurement">Cambodian</a></li>

<li><a href="Indian_units_of_measurement" title="Indian units of measurement">Indian</a></li>

<li><a href="Indonesian_units_of_measurement" title="Indonesian units of measurement">Indonesian</a></li>

<li><a href="Japanese_units_of_measurement" title="Japanese units of measurement">Japanese</a></li>

<li><a href="Korean_units_of_measurement" title="Korean units of measurement">Korean</a></li>

<li><a href="Mongolian_units" title="Mongolian units">Mongolian</a></li>

<li><a href="Myanmar_units_of_measurement" title="Myanmar units of measurement">Myanmar</a></li>

<li><a href="Nepalese_customary_units_of_measurement" title="Nepalese customary units of measurement">Nepalese</a></li>

<li><a href="Omani_units_of_measurement" title="Omani units of measurement">Omani</a></li>

<li><a href="History_of_measurement_systems_in_Pakistan" title="History of measurement systems in Pakistan">Pakistani</a></li>

<li><a href="Philippine_units_of_measurement" title="Philippine units of measurement">Philippine</a></li>

<li><a href="Singaporean_units_of_measurement" title="Singaporean units of measurement">Singaporean</a></li>

<li><a href="Sri_Lankan_units_of_measurement" title="Sri Lankan units of measurement">Sri Lankan</a></li>

<li><a href="Syrian_units_of_measurement" title="Syrian units of measurement">Syrian</a></li>

<li><a href="Taiwanese_units_of_measurement" title="Taiwanese units of measurement">Taiwanese</a></li>

<li><a href="Obsolete_Tatar_units_of_measurement" class="mw-redirect" title="Obsolete Tatar units of measurement">Tatar</a></li>

<li><a href="Vietnamese_units_of_measurement" title="Vietnamese units of measurement">Vietnamese</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Africa</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Algerian_units_of_measurement" title="Algerian units of measurement">Algerian</a></li>

<li><a href="Ethiopian_units_of_measurement" title="Ethiopian units of measurement">Ethiopian</a></li>

<li><a href="Egyptian_units_of_measurement" title="Egyptian units of measurement">Egyptian</a></li>

<li><a href="Eritrean_units_of_measurement" title="Eritrean units of measurement">Eritrean</a></li>

<li><a href="Guinean_units_of_measurement" title="Guinean units of measurement">Guinean</a></li>

<li><a href="Libyan_units_of_measurement" title="Libyan units of measurement">Libyan</a></li>

<li><a href="Malagasy_units_of_measurement" title="Malagasy units of measurement">Malagasy</a></li>

<li><a href="Mauritian_units_of_measurement" title="Mauritian units of measurement">Mauritian</a></li>

<li><a href="Moroccan_units_of_measurement" title="Moroccan units of measurement">Moroccan</a></li>

<li><a href="Seychellois_units_of_measurement" title="Seychellois units of measurement">Seychellois</a></li>

<li><a href="Somali_units_of_measurement" title="Somali units of measurement">Somali</a></li>

<li><a href="South_African_units_of_measurement" title="South African units of measurement">South African</a></li>

<li><a href="Tunisian_units_of_measurement" title="Tunisian units of measurement">Tunisian</a></li>

<li><a href="Tanzanian_units_of_measurement" title="Tanzanian units of measurement">Tanzanian</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">North and Central<br>America</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Costa_Rican_units_of_measurement" title="Costa Rican units of measurement">Costa Rican</a></li>

<li><a href="Cuban_units_of_measurement" title="Cuban units of measurement">Cuban</a></li>

<li><a href="Haitian_units_of_measurement" title="Haitian units of measurement">Haitian</a></li>

<li><a href="Honduran_units_of_measurement" title="Honduran units of measurement">Honduran</a></li>

<li><a href="Mexican_units_of_measurement" title="Mexican units of measurement">Mexican</a></li>

<li><a href="Nicaraguan_units_of_measurement" title="Nicaraguan units of measurement">Nicaraguan</a></li>

<li><a href="Puerto_Rican_units_of_measurement" title="Puerto Rican units of measurement">Puerto Rican</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">South America</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Argentine_units_of_measurement" title="Argentine units of measurement">Argentine</a></li>

<li><a href="Bolivian_units_of_measurement" title="Bolivian units of measurement">Bolivian</a></li>

<li><a href="Brazilian_units_of_measurement" title="Brazilian units of measurement">Brazilian</a></li>

<li><a href="Chilean_units_of_measurement" title="Chilean units of measurement">Chilean</a></li>

<li><a href="Colombian_units_of_measurement" title="Colombian units of measurement">Colombian</a></li>

<li><a href="Paraguayan_units_of_measurement" title="Paraguayan units of measurement">Paraguayan</a></li>

<li><a href="Peruvian_units_of_measurement" title="Peruvian units of measurement">Peruvian</a></li>

<li><a href="Uruguayan_units_of_measurement" title="Uruguayan units of measurement">Uruguayan</a></li>

<li><a href="Venezuelan_units_of_measurement" title="Venezuelan units of measurement">Venezuelan</a></li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Ancient</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Ancient_Arabic_units_of_measurement" title="Ancient Arabic units of measurement">Arabic</a></li>

<li><a href="Biblical_and_Talmudic_units_of_measurement" title="Biblical and Talmudic units of measurement">Biblical and Talmudic</a></li>

<li><a href="Ancient_Egyptian_units_of_measurement" title="Ancient Egyptian units of measurement">Egyptian</a></li>

<li><a href="Ancient_Greek_units_of_measurement" title="Ancient Greek units of measurement">Greek</a></li>

<li><a href="Hindu_units_of_time" title="Hindu units of time">Hindu</a></li>

<li><a href="History_of_measurement_systems_in_India" title="History of measurement systems in India">Indian</a></li>

<li><a href="Ancient_Mesopotamian_units_of_measurement" title="Ancient Mesopotamian units of measurement">Mesopotamian</a></li>

<li><a href="Persian_units_of_measurement" title="Persian units of measurement">Persian</a></li>

<li><a href="Ancient_Roman_units_of_measurement" title="Ancient Roman units of measurement">Roman</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">List articles</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="List_of_humorous_units_of_measurement" title="List of humorous units of measurement">Humorous</a></li>

<li><a href="List_of_obsolete_units_of_measurement" title="List of obsolete units of measurement">Obsolete</a></li>

<li><a href="List_of_unusual_units_of_measurement" title="List of unusual units of measurement">Unusual</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Absolute_scale" title="Absolute scale">Absolute scale</a></li>

<li><a href="Modulor" title="Modulor">Modulor</a></li></ul>

</div></td></tr></tbody></table></div>

<div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="United_States_customary_units214" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="United_States_customary_units214" style="font-size:114%;margin:0 4em"><a href="United_States_customary_units" title="United States customary units">United States customary units</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="Comparison_of_the_imperial_and_US_customary_measurement_systems" title="Comparison of the imperial and US customary measurement systems">Comparison with imperial unit system</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Length</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Thousandth_of_an_inch" title="Thousandth of an inch">Thousandth of an inch</a></li>

<li><a href="Chain_(unit)" title="Chain (unit)">Chain</a></li>

<li><a href="Furlong" title="Furlong">Furlong</a></li>

<ul><li><a href="Mile#Statute" title="Mile">Statute mile</a></li></ul></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Area</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Square_inch" title="Square inch">Square inch</a></li>

<li><a href="Square_foot" title="Square foot">Square foot</a></li>

<li><a href="Square_yard" title="Square yard">Square yard</a></li>

<li><a href="Square_mile" title="Square mile">Square mile</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Volume</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Derived</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Cubic_inch" title="Cubic inch">Cubic inch</a></li>

<li><a href="Cubic_foot" title="Cubic foot">Cubic foot</a></li>

<li><a href="Cubic_yard" title="Cubic yard">Cubic yard</a></li>

<li><a href="Cubic_mile" title="Cubic mile">Cubic mile</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cooking</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Teaspoon" title="Teaspoon">Teaspoon</a></li>

<li><a href="Tablespoon" title="Tablespoon">Tablespoon</a></li>

<li><a href="Fluid_ounce" title="Fluid ounce">Fluid ounce</a></li>

<li><a href="Quart" title="Quart">Quart</a></li>

<li><a href="Gallon" title="Gallon">Gallon</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Wood</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Board_foot" title="Board foot">Board foot</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Minim_(unit)" title="Minim (unit)">Minim</a></li>

<li><a href="Bushel" title="Bushel">Bushel</a></li>

<li><a href="Barrel_(unit)" title="Barrel (unit)">Barrel</a></li>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Speed</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Foot_per_second" title="Foot per second">Foot per second</a></li>

<li><a href="Miles_per_hour" title="Miles per hour">Miles per hour</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Mass</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Grain_(unit)" title="Grain (unit)">Grain</a></li>

<li><a href="Ounce" title="Ounce">Ounce</a></li>

<li><a href="Pound_(mass)" title="Pound (mass)">Pound</a></li>

<li><a href="Hundredweight" title="Hundredweight">Hundredweight</a></li>

<li><a href="Short_ton" title="Short ton">Short</a></li></ul></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Force</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Poundal" title="Poundal">Poundal</a></li>

<li><a href="Pound_(force)" title="Pound (force)">Pound-force</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Pressure</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Inch_of_mercury" title="Inch of mercury">Inch of mercury</a></li>

<li><a href="Pound_per_square_inch" title="Pound per square inch">Pound per square inch</a></li>

<li><a href="Pound_per_square_inch#Multiples" title="Pound per square inch">Kilopound per square inch</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other units and measures</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Bolt_(cloth)" title="Bolt (cloth)">Bolt (cloth)</a></li>

<li><a href="British_thermal_unit" title="British thermal unit">British thermal unit</a></li>

<li><a href="Degree_(angle)" title="Degree (angle)">Degree (angle)</a></li>

<li><a href="Fahrenheit" title="Fahrenheit">Fahrenheit</a></li>

<li><a href="Foot-candle" title="Foot-candle">Foot-candle</a></li>

<li><a href="Foot-lambert" title="Foot-lambert">Foot-lambert</a></li>

<li><a href="Foot-pound_(energy)" title="Foot-pound (energy)">Foot-pound (energy)</a></li>

<li><a href="Horsepower" title="Horsepower">Horsepower</a></li>

<li><a href="Pound-foot_(torque)" title="Pound-foot (torque)">Pound-foot (torque)</a></li>

<li><a href="Spinning_count" title="Spinning count">Spinning count</a></li>

<li><a href="Ton_of_refrigeration" title="Ton of refrigeration">Ton of refrigeration</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related systems</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="American_wire_gauge" title="American wire gauge">American wire gauge</a></li>

<li><a href="Avoirdupois" title="Avoirdupois">Avoirdupois system</a></li>

<li><a href="Body_jewelry_sizes" title="Body jewelry sizes">Body jewelry sizes</a></li>

<li><a href="Foot%E2%80%93pound%E2%80%93second_system_of_units" title="Foot–pound–second system of units">Foot–pound–second system of units</a></li></ul>

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