Dimension |
Equivalent Units |
Mass |
1 kg = 1000 g = 0.001 metric tons (tonne) = 2.20462 lbm= 35.274 oz |
1 lbm = 453.59237 g = 0.45359237 kg = 5 × 10-4 ton = 16 oz |
|
Force |
1 N = 1 kg m/s2 = 105 dynes = 105 g cm/s2 = 0.22418 lbf |
1 lbf = 32.174 lbm ft/s2 = 4.4482 N = 4.4482 × 105 dynes |
|
Length |
1 m = 100 cm = 106 microns (μm) = 1010Å = 39.37 in = 3.2808 ft = 1.0936 yards = 0.0006214 miles |
1 ft = 12 in = 1/3 yard = 0.3048 m = 30.48 cm |
|
Volume |
1 m3 = 1000 L = 106 cm3 = 35.3145 ft3 = 264.17 gal |
1 ft3 = 1728 in.3 = 7.4805 gal = 0.028317 m3 = 28.317 L = 28,317 cm3 |
|
Pressure |
1 atm = 1.01325 × 105 N/m2 (Pa) = 1.01325 bar = 1.01325 × 106 dyne/cm2 = 760 mm Hg @ 0oC |
(torr) = 10.333 m H2O @ 4oC = 33.9 ft H2O @ 4oC = 29.921 in Hg @ 0oC = 14.696 lbf/in2 (psi) |
|
Energy |
1 J = 1 N m = 107 ergs = 107 dyne cm = 2.667 × 10-7 kW h = 0.23901 cal = 0.7376 ft lbf = 9.486 × 10-4 btu (550 ft lbf/hp s) |
Power |
1 W = 1 J/s = 0.23901 cal/s = 0.7376 ft lbf/s = 9.486 × 10-4 btu/s = 1 × 10-3 kW = 1.341 × 10-3 hp |
Flow rate |
1 m3/s = 35.3145 ft3/s = 264.17 gal/s = 1.585 × 104 gal/min (GPM) = 106 cm3/s 1 GPM = 6.309 × 10-5 m3/s = 2.228 × 10-3 ft3/s = 63.09 cm3/s |
Viscosity |
1 Poise = 1 dyn s/cm2 = 100 cP = 0.1 N s/m2 = 0.1 Pa s = 1 gm/(cm s) = 0.0672 lbm/(ft s) = 2.09 × 10-3 lbf s/ft2 |
Example: The factor to convert Pa to psi is 14.696 psi/(1.01325 × 105 Pa) |
|
Some values of the gas constant |
R = 8.314 × 103 kg m2/s2 kgmol K |