Select unit to convert Acres Ancient Greek Units Ancient Roman Units Ares Bars Barrels per day Baryes BTUs BTUs per hour BTUs per minute BTUs per second Degrees Celsius Centimeters (cm) Centimeters per second (cm/sec) Chains Crinals Cubic centimeters (cc) Cubic centimeters per second Cubic centimeters-atmosphere Cubic decimeters Cubic feet Cubic feet per minute Cubic feet per second Cubic inches Cubic inches per minute Cubic inches per second Cubic meters Cubic meters per hour Cubic yards Cubic yards per minute Decimeters (dm) Drams Dynes Ergs per second Degrees Fahrenheit Fluid drachmas Fluid ounces (fl.oz.) Feet (ft) Feet per hour Feet per minute Feet per second Foot-pound-forces (ft-lbf) Foot-pound-forces per hour Foot-pound-forces per minute Foot-pound-forces per second Furlongs Gallons Gallons per day Gallons per minute Gallons per second Gigawatts (GW) Gills Grains Grain-forces Grams (g) Gram-calories (g-cal) Hectares Hectometers Hundredweights (cwt) Inches (in) Inches H2O at 15.56 degrees Celsius Inches Hg at 15.56 degrees Celsius Inch-pound-forces (in-lbf) IST calories Joules (J) Joules per second (J/sec) Degrees Kelvin Kilocalories (kcal) Kilograms (kg) Kilogram-meters per square second Kilogram-calories Kilogram-forces (kgf) Kilogram-forces per square centimeter Kilogram-forces per square meter Kilometers (km) Kilometers per hour (km/h) KiloPascals (kPa) Kilowatts (kW) Kilowatts per hour (kWh) Kips Knots Liters (l) Liters per minute Liters per second Long tons (imperial tons) MegaPascals (mPa) Megawatts (MW) Meters (m) Meters per minute Meters per second Metric horsepower Miles Miles per hour (mph) Miles per minute Milligrams (mg) Milliliters (ml) Millimeters (mm) Miner inches Newtons Ounces (oz) Ounce-forces Pascals (Pa) Pints Pounds (lb) Pounds per square foot Pounds per square inch Poundals Poundals per square foot Poundals per square inch Pounds-CHU Pound-forces (lbf) Quarts Quarters Rods Short tons per square foot Slugs Square centimeters Square decimeters Square feet Square kilometers Square meters Square miles Square millimeters Square yards Stones Thermocalories Tons Tons (refrigeration) Tonnes (metric tons) Torrs U.S. gallons U.S. horsepower per hour U.S. pints U.S. tons Watts Watts per hour Yards

Click here for a popup calculator and here for the units' list in categorical order         Weight Convert ton hundredweight (cwt) pound US ton quarter stone ounce dram grain tonne kilogram gram milligram In ton hundredweight (cwt) pound US ton quarter stone ounce dram grain tonne kilogram gram milligram   =   Length Convert mile furlong chain rod yard foot inch kilometer hectometer meter decimeter centimeter millimeter In mile furlong chain rod yard foot inch kilometer hectometer meter decimeter centimeter millimeter   = Volume Convert gallon quart pint gill fluid ounce fluid drachm US gallon US pint cubic yard cubic foot cubic inch cubic meter liter cubic decimeter cubic centimeter milliliter In gallon quart pint gill fluid ounce fluid drachm US gallon US pint cubic yard cubic foot cubic inch cubic meter liter cubic decimeter cubic centimeter milliliter   =   Area Convert square mile acre square yard square foot square kilometer hectare are square meter square decimeter square centimeter square millimeter In square mile acre square yard square foot square kilometer hectare are square meter square decimeter square centimeter square millimeter   = Velocity Convert mile per hour centimeter per second foot per hour foot per minute foot per second kilometer per hour knot meter per minute meter per second mile per minute In mile per hour centimeter per second foot per hour foot per minute foot per second kilometer per hour knot meter per minute meter per second mile per minute   =   Energy Convert British Thermal Unit (BTU) calorie (IST) calorie (thermo) cubic centimeter-atmosphere foot-pound-force gram-calorie US horsepower per hour inch-pound-force kilogram-calorie kilowatt per hour pound-CHU watt per hour joule kilocalorie In British Thermal Unit (BTU) calorie (IST) calorie (thermo) cubic centimeter-atmosphere foot-pound-force gram-calorie US horsepower per hour inch-pound-force kilogram-calorie kilowatt per hour pound-CHU watt per hour joule kilocalorie   = Force Convert Newton crinal dyne grain kilogram-force kilogram-meter per square second kip ounce-force pound-force poundal slug imperial ton (long ton) In Newton crinal dyne grain kilogram-force kilogram-meter per square second kip ounce-force pound-force poundal slug imperial ton (long ton)   =   Flowrate Convert gallon per minute barrel per day cubic centimeter per second cubic inch per second cubic inch per minute cubic foot per minute cubic foot per second cubic meter per hour cubic yard per minute gallon per day gallon per second liter per minute liter per second miner's inch In gallon per minute barrel per day cubic centimeter per second cubic inch per second cubic inch per minute cubic foot per minute cubic foot per second cubic meter per hour cubic yard per minute gallon per day gallon per second liter per minute liter per second miner's inch   = Power Convert watt BTU per hour BTU per minute BTU per second foot-pound-force per hour foot-pound-force per minute foot-pound-force per second gigawatt joule per second metric horsepower kilowatt megawatt ton (refrigeration) erg per second In watt BTU per hour BTU per minute BTU per second foot-pound-force per hour foot-pound-force per minute foot-pound-force per second gigawatt joule per second metric horsepower kilowatt megawatt ton (refrigeration) erg per second   =   Pressure Convert   pascal bar barye inch H2O (15.56 °C) inch Hg (15.56 °C) kilogram-force per square centimeter kilogram-force per square meter kilopascal megapascal pound per square foot pound per square inch poundal per square inch poundal per square foot short ton per square foot torr In pascal bar barye inch H2O (15.56 °C) inch Hg (15.56 °C) kilogram-force per square centimeter kilogram-force per square meter kilopascal megapascal pound per square foot pound per square inch poundal per square inch poundal per square foot short ton per square foot torr   = Temperature  Select  Conversion  Celsius  -->  Fahrenheit   Celsius  -->  Kelvin  Fahrenheit  -->  Celsius  Fahrenheit  -->  Kelvin  Kelvin  -->  Fahrenheit  Kelvin  -->  Celsius     Historical Units Ancient Greek Units Ancient Roman Units

	What is a metre (meter)?
	A metre (symbol: m), or meter, is the unit of length at the base of the International System of Units (SI).  The French Academy of Sciences was the first institution to officially define the length of a metre. In 1983, a new definition replaced the previous one.  Since then, a metre is the equivalent of the distance light travels in free space in 1 / 299,792,458 of a second.

	What is a yard?
	A yard (symbol: yd) is a length unit used in the English, Imperial and U.S. customary units' systems.  It is the equivalent of 0.9144 metre in the International System (SI), 36 inches in the Imperial System and 3 feet in the U.S. Customary System.

What is the proper appellation of the "Système international d'unités" in other languages?  Must we always use the French appellation?

The French abbreviation for the "Système international" is SI.  Hence, SI is the universal abbreviated form of this particular system.  You can also use a translated appellation, if needed: Afrikaans internasionale eenheidstelsel Deutsch Internationales Einheitensystem English International System of Units Español Sistema Internacional de Unidades Esperanto Sistemo Internacia de Unuoj فارسی سیستم استاندارد بین ‌المللی واحدها 한국어 국제단위계 Íslenska Alþjóðlega einingakerfið Italiano Sistema internazionale di unità di misura עברית מערכת היחידות הבינלאומית Nederlands SI-stelsel 日本語 国際単位系 Polski Układ SI Português Sistema Internacional de Unidades Română Sistemul internaţional de unităţi Русский СИ Suomi Kansainvälinen yksikköjärjestelmä Türkçe M.K.S. (metre, kilogram, saniye) Українська Міжнародна система СІ 粵語 國際單位制 中文 国际单位制

	What are the Metric System prefixes?
	The Metric System prefixes are: Prefix Abbr. Meaning deka da 10 hecto h 100 kilo k 1000 mega M 106 (million) giga G 109 (billion) tera T 1012 (trillion) peta P 1015 (quadrillion) exa E 1018 (quintillion) zetta Z 1021 (sextillion) yotta Y 1024 (septillion) deci d 1/10 centi c 1/100 milli m 1/1000 micro µ 1/106 nano n 1/109 pico p 1/1012 femto f 1/1015 atto a 1/1018 zepto z 1/1021 yocto y 1/1024

You have a question about units or a comment regarding this   website?  If so, do not hesitate to contact the webmaster.

Worldwide use of the Metric System and Date of Metrication

1795  France 1820  Belgium, Luxembourg, Netherlands 1840  Algeria 1853  Colombia, Monaco 1858  Cuba, Spain 1862  Brazil, Mexico 1863  Italy, Uruguay 1865  Chile, Ecuador 1868  Peru, Puerto Rico 1871  Austria, Liechtenstein 1872  Germany, Portugal 1875  Norway, Czechoslovakia 1876  Sweden, Switzerland, Hungary   Yugoslavia 1878  Mauritius, Seychelles 1884  El Salvador, Romania 1886  Argentina, Finland 1891  Bolivia, Bulgaria 1893  Nicaragua, Tunisia 1900  Iceland, Paraguay 1908  Denmark, Costa Rica 1910  Burundi, Rwanda, Zaire 1911  Honduras 1912  Dominican Republic 1915  Guatemala, San Marino   Panama, Venezuela 1916  Philippines, Surinam 1918  Poland, Mongolia 1920  Haiti, Malta 1922  Cambodia, Morocco 1923  Afghanistan, Libya 1925  Russia, China 1927  Iran 1930  Iraq, Turkey 1934  Lebanon, Syria 1946  Indonesia, Thailand 1948  Albania, Korea, Israel 1952  Jordan, Taiwan 1954  India, Sudan 1957  Japan, Greece 1959  Ivory Coast, Guinea 1960  Chad, Gabon   Central African Republic, Mali   Malagasy Republic, Dahomey   Mauritania, Niger, Senegal, Togo   Burkina Faso, Somalia   Congo People's Republic 1961  Cameroon, U.A.R. 1962  Ethiopia, Nigeria 1963  Laos, Vietnam 1964  Saudi Arabia 1965  Britain 1967  Ireland, Pakistan, Kenya, Uganda   Tanzania 1968  South Africa 1969  Australia, New Zealand 1970  Canada, Quebec 1998  Jamaica * The United States of America, Burma and Liberia have not adopted the Metric System (SI).

"The Proclamation regarding Weights and Measures A.D. 1556" by Ford Madox Brown Mural at Manchester Town Hall

Conversion Table  /  Table de conversion

Area / Superficie

Length / Longueur

Volume

---

Hyperlinks of Interest

For a link exchange, contact the webmaster

 

 

A Military Historical Database   Footnotes, Endnotes, eReferences and Bibliography Methodology   Online Mandalas

---

Stumble It!   del.icio.us Conversion tables and results shown on this website are for information purposes only.  Please contact the webmaster if you find an error on this site.  Although we cannot be held responsible for errors that may have been made, we shall proceed with the correction of any reported error in a timely manner. ImperialToMetric.com Digital Converter ©MMX Robert Radford, M.A.    All rights reserved / Tous droits réservés