SELECTED DIMENSIONAL EQUIVALENTS brought to you by iCrank.com

 
  Length
1 m = 3.2808 ft = 39.37 in
1 cm = 10-2 m = .3937 in
= .032808 ft
1 in = 25.4 mm
1 mm = 10-3 m
1 µm = 10-6 m
1 A = 10-10 m
1 km = .6214 mi
1 mi = 5280 ft
  Area
1 m2 = 10.76 ft2
1 cm2 = 10-4 m2 = .155 in2

 
  Volume
1 gal = .13368 ft3 = 3.785 liters
1 liter = 10-3 m3

 
  Temperature
°F = {(9/5) * °C} + 32
°C = (5/9) * (°F - 32)
°R = °F + 459.69
°K = °C + 273.15

 
  Mass
1 kg = 1000 g = 2.2046 lbm
= 6.8521 * 10-2 slug
1 slug = 1 lbf*s2 /ft
= 32.174 lbm

 
  Force
1 N = 1 kg*m/s2
1 dyn =  1 g*cm/s2
1 lbf = 4.448 * 10-5 dyn
= 4.448 N
  Pressure
1 atm = 14.696 lbf/in2 = 760 torr
= 101325 N/m2
1 mm Hg = .01934 lbf/in2 = 1 torr
1 dyn/cm2 = 145.04 * 10-7 lbf/in2
1 bar = 105 N/m2 = 14.504 lbf/in2
= 106 dyn*cm2
1 µ = 10-6 m*Hg = 10-3 mm*Hg
1 Pa = 1 N/m2 = 1.4504 * 10-4 lbf/in2
1 in Hg = 3376.8 N/m2
1 in H2O = 248.8 N/m2

 
  Energy
1 J = 1 kg*m2/s2
1 Btu = 778.16 ft*lbf
= 1.055 * 1010 ergs = 252 cal
= 1055.0 J
1 cal = 4.186 J
1 kcal = 4186 J = 1000 cal
1 erg = 1 g*cm2/s2 = 10-7 J
1 eV = 1.602 * 10-19 J
1 Q = 1018 Btu = 1.055 * 1021 J
1 Quad = 1015 Btu
1 kJ = .947813 Btu = .23884 kcal
  Power
1 W = 1 kg*m2/s3 = 1 J/s
1 hp = 550 ft*lbf/s = 2545 Btu/h
= 746 W
1 kW = 1000 W = 3412 Btu/h

 
  Time
1 h = 3600 s = 60 min
1 ms = 10-3 s
1 µs = 10-6 s
1 ns = 10-9 s

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