Unit Conversions
I compiled the following table of conversion factors and constants primarily because engineers in the United States refuse to work in a sane (read: SI) system of units.
Quantity Equivalent Values Source Number Source Page
Mass 1 kg = 1000 g = 0.001 metric ton = 2.20462 lbm
= 35.27392 oz
 1 (Inside Front Cover)
1 lbm = 16 oz = 5 x 10-4 ton = 453.593 g
= 0.453593 kg 		1 (Inside Front Cover)
Length 1 m = 100 cm = 1000 mm = 106 microns (�m)
= 1010 angstroms (�) = 39.37 in. = 3.2808 ft
= 1.0936 yd = 0.0006214 mile 		1 (Inside Front Cover)
1 ft = 12 in. = 1/3 yd = 0.3048 m = 30.48 cm 1 (Inside Front Cover)
Volume 1 m3 = 1000 L = 106 cm3 = 106 mL = 35.3145 ft3
= 220.83 imperial gallons = 264.17 gal = 1056.68 qt 		1 (Inside Front Cover)
1 ft3 = 1728 in.3 = 7.4805 gal = 0.028317 m3
= 28.317 L = 28,317 cm3 		1 (Inside Front Cover)
Force 1 N = 1 kg�m/s2 = 105 dynes = 105 g�cm/s2
= 0.22481 lbf 		1 (Inside Front Cover)
1 lbf = 32.174 lbm�ft/s2 = 4.4482 N
= 4.4482 x 105 dynes 		1 (Inside Front Cover)
Pressure 1 atm = 1.01325 x 105 N/m2 (Pa) = 101.325 kPa
= 1.01325 bar = 1.01325 x 106 dynes/cm2
= 760 mm Hg at 0�C (torr) = 10.333 m H2O at 4�C
= 14.696 lbf/in.2 (psi) = 33.9 ft H2O at 4�C
= 29.921 in. Hg at 0�C 		1 (Inside Front Cover)
Energy 1 J = 1 N�m = 107 ergs = 107 dyne�cm
= 2.778 x 10-7 kW�h = 0.23901 cal = 0.7376 ft�lbf
= 9.486 x 10-4 Btu 		1 (Inside Front Cover)
Power 1 W = 1 J/s = 0.23901 cal/s = 0.7376 ft�lbf/s
= 9.486 x 10-4 Btu/s = 1.341 x 10-3 hp 		1 (Inside Front Cover)

Constants
Constant Value Units Source Number Source Page
Gas Constant (R) 8.314 m3�Pa/(mol�K) 1 (Inside Back Cover)
J/(mol�K) 1 (Inside Back Cover)
0.08314 L�bar/(mol�K) 1 (Inside Back Cover)
0.08206 L�atm/mol�K 1 (Inside Back Cover)
62.36 L�mm Hg/(mol�K) 1 (Inside Back Cover)
0.7302 ft3�atm/(lb-mole��R) 1 (Inside Back Cover)
10.73 ft3�psia/(lb-mole��R) 1 (Inside Back Cover)
1.987 cal/(mol�K) or
 1 (Inside Back Cover)
Btu/(lb-mole��R) 1 (Inside Back Cover)

Sources
Source Number Source Title Source Author(s) Edition
1 Elementary Principles of Chemical Processes Felder, Rousseau 3

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