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Unit Conversion Table

This conversion table package allows conversion from one set of units to another. It is for manual use and does no calculations. But, this is a very easily printed table for reference. Most of the conversion factors are taken from the public domain information of the U.S. National Institute of Standards and Technology, NIST.

If you would like to automatically convert, try using our:
Master Unit Converter

or for more printable reference:
Conversion Factors Table

Standard Prefixes

Prefix used in code Prefix for written unit Multiplier
da- deka- 10
h- hecto- 100
k- kilo- 1000
M- mega- 1e6
G- giga- 1e9
T- tera- 1e12
P- peta- 1e15
E- exa- 1e18
Z- zeta- 1e21
Y- yotta- 1e24
d- deci- 1e-1
c- centi- 1e-2
m- milli- 1e-3
mu- micro- 1e-6
n- nano- 1e-9
p- pico- 1e-12
f- femto- 1e-15
a- atto- 1e-18
z- zepto- 1e-21
y- yocto- 1e-24

Standard Units

Unit Symbol Definition Comments
second sec 1 s  
minute min 60 s  
hour hr 60 min  
hour hour 1 hr alternate symbol
hour h 1 hr alternate symbol
day day 24 hr  
shake shake 10 ns  
Hertz Hz 1 s^-1  
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
Celsius C 1 K -273.15  
Rankine R 5.0/9.0 K  
Fahrenheit F 1 R -459.67  
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^2/ft  
snail snail 1 lb sec^2/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  
Force or Weight
Newton N 1 kg m/s^2  
Dyne dyn 1e-5 N  
pound force lb lbm G  
pound force lbf lbm G  
poundal poundal 1 lbm ft/sec^2  
kilopound kip 1000 lbf  
kilogram force kgf kg G  
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  
Watt W 1 J/s  
Horse Power hp 550 ft lb/s  
bar bar 1e5 N/m^2  
Pascal Pa 1 N/m^2  
Pounds per sq. inch psi 1 lb/in^2  
Pounds per sq. ft. psf 1 lb/ft^2  
kilo psi ksi 1000.0 psi  
atmospheres atm 1.01325e5 N/m^2  
inches of Mercury inHg 3.387 kPa  
millimeters Mercury mmHg 0.1333 kPa  
Torr torr 1.333224 Pa  
Volume or Area
Liter L 1/1000.0 m^3  
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^2  
Hectare ha 10000 m^2  
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  
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 m^2/s  
Oersted Oe 79.57747 A/m  
Webber Wb V s Magnetic flux
Tesla Tesla Wb/m^2 Magnetic flux density
Henry H Wb/A Inductance
Siemens S A/V Electrical Conductance
Light and Radiation
Lux lux cd/m^2 Iluminance
Lux lx cd/m^2  
Lumen lm cd Luminous Flux
Stilb sb 10000 cd/m^2  
Phot ph 10000 lx  
Becquerel Bq s^-1 activity
Gray Gy J/kg Absorbed Dose, kerma
Sievert Sv J/kg Dose equivalent
Other Quantities
pound mole lbmole 1 mol lbm/g quantity
poise poise 1 g /sec cm viscosity
Gravity's accel. G 9.80665 m/sec^2 Gravity on Earth
Degree deg Pi/180 Can be used to convert from degrees to radians for trig functions.
Percent % 0.01  
Knot knot 1852 m/hr velocity
Miles per Hour mph 1 mi/hr velocity
Gallon/minute gpm 1. gal/min flow rate
Revolution/minute rpm 360 deg/min  
Updated: 7/1/11

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