Conversion of units - International units •
English and American units: length, area, volume (liter),
weight (mass), force, pressure, density, and temperature

 Length and distance inch (in) | Zoll foot (ft) | Fuß yard (yd) sea mile | Seemeile statute mile | engl. Meile millimeter (mm) centimeter (cm) meter (m) kilometer (km) = inch (in) | Zoll foot (ft) | Fuß yard (yd) sea mile | Seemeile statute mile | engl. Meile millimeter (mm) centimeter (cm) meter (m) kilometer (km)
 Area square inch (sq in) square foot (sq ft) square yard (sq yd) acre square mile square millimeter (mm^2) square centimeter (cm^2) square meter (m^2) Ar (a) hectare (ha) square kilometer (km^2) = square inch (sq in) square foot (sq ft) square yard (sq yd) acre square mile square millimeter (mm^2) square centimeter (cm^2) square meter (m^2) Ar (a) Hectar (ha) square kilometer (km^2)
 Volume (Liter) cubic inch (cu in) cubic foot (cu ft) cubic yard (cu yd) pint (UK liquid) quart (UK liquid) gallon (UK liquid) pint (US liquid) quart (US liquid) gallon (US liquid) milliliter (ml) liter (l) hectoliter (hl) cubic meter (m^3) barrel (oil) Brutto-Registertonne (RT) ocean ton = cubic inch (cu in) cubic foot (cu ft) cubic yard (cu yd) pint (UK liquid) quart (UK liquid) gallon (UK liquid) pint (US liquid) quart (US liquid) gallon (US liquid) milliliter (ml) liter (l) hectoliter (hl) cubic meter (m^3) barrel (oil) Brutto-Registertonne (RT) ocean ton
 Weight (Mass) carat (metr., Kt) dram (dr) ounce (oz) pound (lb) hundredweight (cwt) short cwt short ton long ton milligramm (mg) gram (g) kilogram (kg) tonne (t) = carat (metr., Kt) dram (dr) ounce (oz) pound (lb) hundredweight (cwt) short cwt short ton long ton milligram (mg) gram (g) kilogram (kg) tonne (t)
 Force ounce force pound force (lbf) kilogram force (kgf) poundal kilopound (kp) dyn newton (N) = ounce force pound force (lbf) kilogram force (kgf) poundal kilopound (kp) dyn newton (N)
 Pressure = Force / Area pound / square inch (psi) pound / square foot (psf) kgf / square centimeter ton long / square inch ton long / square foot Millibar Bar Millipascal (mPa) Pascal (Pa) Hektopascal (HPa) Kilopascal (kPa) Megapascal (MPa) Torr inch (mercury 32°F) Zentimeter (Wasser 4°C) = pound / square inch (psi) pound / square foot (psf) kgf / square centimeter ton long / square inch ton long / square foot Millibar Bar Millipascal (mPa) Pascal (Pa) Hektopascal (HPa) Kilopascal (kPa) Megapascal (MPa) Torr inch (mercury 32°F) Zentimeter (Wasser 4°C)
 Density pound / cubic inch pound / cubic foot pound / cubic yard ton long / cubic yard kilogramm / liter (kg/l) tonne / cubic meter (t/m^3) gramm / liter (g/l) kg / m^3 g / cm^3 = pound / cubic inch pound / cubic foot pound / cubic yard ton long / cubic yard kilogram / liter (kg/l) tonne / cubic meter (t/m^3) gram / liter (g/l) kg / m^3 g / cm^3

Temperature
 Celsius: Fahrenheit:
 Celsius: Kelvin:

More calculations of units:

prefixes| length | area | volume | weight | pressure | temperature | time | energy | power | density | velocity | acceleration | force

Conver

 When you know multiply by to find inches 25.4 millimeters inches 2.54 centimeters feet 30.48 centimeters yards 0.9144 meters miles 1.609344 kilometers teaspoons 4.93 milliliters tablespoons 14.79 milliliters fluid ounces 29.57353 milliliters cups 0.2365882 liters pints 0.4731756 liters quarts 0.9463529 liters gallons 3.785412 liters cubic feet 0.02831685 cubic meters cubic yards 0.7645549 cubic meters ounces 28.34952313 grams pounds 0.4535924 kilograms short tons (2,000 lbs) 0.91 metric tons square inches 6.4516 square centimeters square feet 0.09290304 square meters square yards 0.83612736 square meters square miles 2.589988103 square kilometers acres 0.40 hectacres

sion from U.S. customary to metric units

From metric to U.S. Customary units

 When you know multiply by to find millimeters 0.03937 inches centimeters 0.3937 inches meters 3.28084 feet meters 1.0936133 yards kilometers 0.6213712 miles milliliters 0.20 teaspoons milliliters 0.06 tablespoons milliliters 0.03 fluid ounces liters 1.0566883 quarts liters 0.26 gallons liters 4.23 cups liters 2.12 pints cubic meters 35.32 cubic feet cubic meters 1.35 cubic yards grams 0.035 ounces kilograms 2.21 pounds metric ton (1,000 kg) 1.10 short ton square centimeters 0.16 square inches square meters 1.20 square yards square kilometers 0.39 square miles hectacres 2.47 acres

Temperature conversion between Celsius and Fahrenheit

°C = (°F - 32) / 1.8

°F = (°C · 1.8) + 32

 Condition Fahrenheit Celsius Boiling point of water 212° 100° A very hot day 104° 40° Normal body temperature 98.6° 37° A warm day 86° 30° A mild day 68° 20° A cool day 50° 10° Freezing point of water 32° 0° Lowest temperature Gabriel Fahrenheitcould obtain by mixing salt and ice 0° -17.8°

U.S. Customary system: length

 Unit Relation to Other U.S. Customary Units Metric Equivalent inch 1/12 foot 2.54 centimeters foot 12 inches or 1/3 yard 0.3048 meter yard 36 inches or 3 feet 0.9144 meter rod 16 1/2 feet or 5 1/2 yards 5.0292 meters furlong 220 yards or 1/8 mile 0.2012 kilometer mile (statute) 5,280 feet or 1,760 yards 1.6093 kilometers mile (nautical) 2,025 yards 1.852 kilometers

U.S. Customary system: Volume or capacity (liquid measure)

 Unit Relation to Other U.S. Customary Units Metric Equivalent ounce 1/16 pint 29.574 milliliters gill 4 ounces 0.1183 liter pint 16 ounces 0.4732 liter quart 2 pints or 1/4 gallon 0.9463 liter gallon 128 ounces or 8 pints 3.7853 liters barrel A confusing unit of measure (wine) 31 1/2 gallons 119.24 liters (beer) 36 gallons 136.27 liters (oil) 42 gallons 158.98 liters

U.S. Customary system: Volume or capacity (dry measure)

 Unit Relation to Other U.S. Customary Units Metric equivalent pint 1/2 quart 0.5506 liter quart 2 pints 1.1012 liters peck 8 quarts or 1/4 bushel 8.8098 liters bucket 2 pecks 17.620 liters bushel 2 buckets or 4 pecks 35.239 liters

U.S. Customary system: weight

 Unit Relation to Other U.S. Customary Units Metric equivalent grain 1/7000 pound 64.79891 milligrams dram 1/16 ounce 1.7718452 grams ounce 16 drams 28.349523 grams pound 16 ounces 453.59237 grams ton (short) 2,000 pounds 907.18474 kilograms ton (long) 2,240 pounds 1 016.04691 kilograms

U.S. Customary system: geographic area

 Unit Relation to other U.S. customary units Metric equivalent acre 4 840 square yards 4 046.85642 square meters

Cooking measures

 Unit US Relation to other cooking measures Conversion to metric units drop 1/76 teaspoon 0.064854231 milliliter teaspoon 76 drops or 1/3 tablespoon 4.92892159 milliliters tablespoon 3 teaspoons 14.7867648 milliliters cup 16 tablespoons or 1/2 pint 0.2365882368 liter pint 2 cups 0.4731764736 liter quart 4 cups or 2 pints 0.9463529472 liter

British Imperial System: Volume or capacity (liquid measure)

 Unit Relation to otherBritish Imperial Units Conversion to U.S.customary units Conversion tometric units pint 1/2 quart 1.201 pints 0.5683 liter quart 2 pints or 1/4 gallon 1.201 quarts 1.137 liters gallon 8 pints or 4 quarts 1.201 gallons 4.546 liters

British Imperial System: Volume or capacity (dry measure)

 Unit Relation to otherBritish Imperial Units Conversion to U.S.customary units Conversion tometric units peck 1/4 bushel 1.0314 pecks 9.087 liters bushel 4 pecks 1.0320 bushels 36.369 liters

Apothecary weights

 Unit Relation to other apothecary units Conversion to U.S.Customary Units Conversion tometric units grain 160 dram or 1/5760 pound equal to the U.S. Customary grain 64.799 milligrams dram 60 grains or 1/8 ounce 2.1943 drams 3.8879 grams ounce 8 drams 1.0971 ounces 31.1035 grams pound 12 ounces or 96 drams 0.8232 pound 373.242 grams

Units of the International System

The International System abbreviated SI, for Systeme International, the French name for the system,
was adopted in 1960 by the 11th General Conference on Weights and Measures. An expanded and
modified version of the metric system, International System addresses the needs of modern science
for additional and more accurate units of measurement. The key features of the International System are
decimalization, a system of prefixes, and a standard defined in terms of an invariable physical measure.

Base units

The International System has base units from which all others in the system are derived.
The standards for the base units, except for the kilogram, are defined by unchanging and
reproducible physical occurences. For example, the meter is defined as the distance
traveled by light in a vacuum in 1/299,792,458 of a second. The standard for the kilogram
is a platinum-iridium cylinder kept at the International Bureau of Weights and
Standards in Sèvres, France.

 Unit quantity symbol meter length m kilogram mass kg second time s ampere electric current A kelvin temperature K mole amount of matter mol candela luminous intensity cd

Supplementary units

The International System uses two supplementary units that are based on abstract
geometrical concepts rather than physical standards.

 Unit quantity symbol angstrom = 10-10 m length Å electron-volt = 0.1602 10-19 J energy eV hectare = 10,000 m2 land area ha liter = 1.0 dm3 volume or capacity l standard atmosphere = 101.325 kPa pressure atm

Derived units

Most of the units in the International System are derived units, that is units defined in terms of
base units and supplementary units. Derived units can be divided into two groups: those that
have a special name and symbol, and those that do not

Without names and symbols
Measure of derivation
acceleration m/s2