Units and Dimensions

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Dimension| SI Units| English Unit|
Length | meter(m)| foot(ft)|
Mass| kilogram(kg)| pound-mass(lbm)1|
Time| second(s)| second(s)|
Electric Current | ampere(A)| ampere(A)|
Thermodynamic Temperature| kelvin(K)| rankine (R)1|
Amount of Substance| mole(mol)| mole(mol)|
1http://www.mne.psu.edu/cimbala/Learning/General/units.htm
Conversion Factors

Length
1 m= 3.281 ft
1 m = 39.37 in.
1 ft= 0.305 m
1 cm= 0.394 in.
1 in. = 2.540 cm
1 ft. = 30.48 cm
1 yd= 91.44 cm
1 mi= 5280 ft
1 mi= 1.609 km

Mass
1 kg= 2.204 lbm
1 kg= 0.0685 slug
1 lbm= 0.453 kg
1 slug= 14.59 kg

Thermodynamic Temperature
1 kelvin= 9/5 rankine
1 rankine= 5/9 kelvin

Area
1 cm2= 0.155 in.2
1 m2= 10.76 ft2= 104cm2
1 in.2= 6.452 cm2
1 ft2= 144 cm2= 0.0929 m2

Volume
1 liter=1000 cm3=10-3 m3= 0.03531 ft3= 61.02in.3
1 gallon= 3.788 liters
Acceleration
1 m/s2= 3.281 ft/s2
1 ft/s2 = 0.3048 m/s2

Speed
1 m/s= 3.281 ft/s
1 ft/s = 0.3048 m/s
1 mi/min= 88 ft/s
1 km/h= 0.2778 m/s = 0.6214 mi/h

Force
1 N= 105 dyn= 0.2248 lb
1 lb= 4.448 N= 4.448 x 105 dyn

Pressure
1 Pa= 1 N/m2= 0.209 lb/ft2
1 bar= 105 Pa
1 atm= 1.013 x 105 Pa = 1.013 bar
1 mm Hg= 1 torr= 133.3 Pa

Energy
1 J= 107 erg= 0.239 cal
1 cal= 4.186 J
1 eV= 1.602 x 10-9 J
1 kWh=3.6 x 106 J

Power
1 W=1 J/s
1 hp=746 W
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