Unit Conversion tables

Standard Units

Unit

Symbol

Definition

Comments

Volume or Area

Liter L 1/1000.0
gallon gal 3.785412 L
Pint (U.S. liquid) pint 1/8. gal
Quart (U.S. liquid) qt 2 pint
Pint (U.S. dry) dpint 0.5506105 L
Quart (U.S. dry) dqt 2 dpint
Acre acre 1/640.0 smi
Hectareha 10000 m
Barrel (petroleum) barrel 158.9873 L
Fluid Ounce oz_fl 29.57353 mL
Gill (U.S.) gi 0.1182941 L
Peck (U.S.) pk 8.809768 L
Tablespoon tbl 1/32. pint
Teaspoon tsp 1/3. tbl
Cup cup 16. tbl

Force or Weight

Newton N 1 kg m/s
Dyne dyn 1e-5 N
pound force lb lbm G
pound force lbf lbm G
poundal poundal 1 lbm ft/sec
kilopound kip 1000 lbf
kilogram force kgf kg G

Time

secondsec1 s
minutemin60 s
hourhr60 min
hourhour1 hralternate symbol
hourh1 hralternate symbol
day day 24 hr
shake shake 10 ns
Hertz Hz 1 s

Length or Distance

international foot ft 0.3048 m
inch in 1.0/12.0 ft
international mile mile 5280.0 ft
international mile mi 1 mile alternate symbol
milli-inch mil 0.001 in
Parsec pc 3.085678e16 m
League league 3 mile
Astronomical Unit ua 1.49598e11 m
Astronomical Unit AU 1.49598e11 m alternate symbol
yard yd 3 ft
Angstrom Ang 1e-10 m
Angstrom \\AA 1 Ang alternate symbol
furlong furlong 220 yd
fathom fathom 6 ft
Rod rd 16.5 ft
U.S. survey foot sft (1200./3937.) m
U.S. survey mile smi 5280 sft also called statue mile
point pt 1./72. in Typeface Point
pica pica 1./6. in Typeface Pica

Temperature

Celsius C 1 K -273.15
Rankine R 5.0/9.0 K
Fahrenheit F 1 R -459.67

Mass

gram g 0.001 kg This is case sensitive.
gram gm g (alternate symbol)
pound mass lbm 0.45359237 kg (avoirdupois)
Troy pound lbt 0.3732417 kg (apothecary)
carat (metric) carat 0.2 g
slug slug 1 lb sec/ft
snail snail 1 lb sec/in
Short Ton ton 2000 lbm
Long Ton ton_l 2240 lbm
Ounce oz 28.34952 g (avoirdupois)
Grain gr 64.79891 mg
Pennyweight dwt 1.55174 g

Energy

Joule J 1 N m
British Therm. Unit BTU 1055.056 J (International Table)
British Therm. Unit Btu 1 BTU alternate symbol
British Therm. Unit BTU_th 1054.350 J (Thermochemical)
calorie cal 4.1868 J (International Table)
calorie cal_th 4.184 J (Thermochemical)
Calorie Cal 4.1868 kJ (nutritionists)
electron volt eV 1.602177e-19 J
erg erg 1e-7 J
Ton of TNT TNT 4.184e9 J

Power

Watt W 1 J/s
Horse Power hp 550 ft lb/s

Pressure

bar bar 1e5 N/
Pascal Pa 1 N/m
Pounds per sq. inch psi 1 lb/in
Pounds per sq. ft. psf 1 lb/ft
kilo psi ksi 1000.0 psi
atmospheres atm 1.01325e5
inches of Mercury inHg 3.387 kPa
millimeters Mercury mmHg 0.1333 kPa
Torr torr 1.333224 Pa

Electromagnetism

Coulomb Co 1 A s Electric Charge
Volt V 1 W/A Electric Potential
Ohm ohm 1 V/A Electric Resistance
Ohm \\Omega 1 V/A alternate symbol
Faraday faraday 96485.31 Co Electric Charge
Farad farad Co/V Capacitance
Stokes stokes 1e-4/s
Oersted Oe 79.57747 A/m
Webber Wb V s Magnetic flux
Tesla Tesla Wb/ Magnetic flux density
Henry H Wb/A Inductance
Siemens S A/V Electrical Conductance

Light and Radiation

Lux lux cd/ Iluminance
Lux lx cd/
Lumen lm cd Luminous Flux
Stilb sb 10000 cd/m
Phot ph 10000 lx
Becquerel Bq s activity
Gray Gy J/kg Absorbed Dose, kerma
Sievert Sv J/kg Dose equivalent

Other Quantities

pound mole lbmole 1 mol lbm/g quantity
poisepoise1 g /sec cmviscosity
Gravity's accel.G9.80665 m/secGravity on Earth
DegreedegPi/180Can be used to convert from degrees to radians for trig functions.
Percent%0.01
Knotknot1852 m/hrvelocity
Miles per Hourmph1 mi/hrvelocity
Gallon/minutegpm1. gal/minflow rate
Revolution/minuterpm360 deg/min