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 |
|
|
