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Formulas
Standard Units , IP code
Standard Units
Standard Units |
Unit |
Symbol |
Definition |
Comments |
Time |
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 |
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^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 |
- |
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/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 |
- |
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 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 |
viscocity |
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 |
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