Machinery's Handbook, 31st Edition
MOMENT AND TORQUE CONVERSION FACTORS Table 43b. Newton-Meters to Pound-Inches Conversion
2865
N•m lb f -in
N•m lb f -in
N•m lb f -in
N•m lb f -in
N•m lb f -in 0.01 0.09 0.02 0.18 0.03 0.27 0.04 0.35 0.05 0.44 0.06 0.53 0.07 0.62 0.08 0.71 0.09 0.80 0.10 0.89
100 200 300 400 500 600 700 800
885.07 1770.15 2655.22 3540.30 4425.37 5310.45 6195.52 7080.60 7965.67 8850.75
10 20 30 40 50 60 40 80
88.51 177.01 265.52 354.03 442.54 531.04 619.55 708.06 796.57 885.07
1 2 3 4 5 6 7 8 9
8.85 17.70 26.55 35.40 44.25 53.10 61.96 70.81 79.66 88.51
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.89 1.77 2.66 3.54 4.43 5.31 6.20 7.08 7.97 8.85
900 1000
90 100
10
1 newton-meter = 8.850748 pound-inches Poundal.— The expression “poundal” is sometimes used in connection with calculations in mechanics. Many mechanical handbooks, however, do not define it, because of its lim ited use. A poundal is a unit of force and is defined as that force which, acting on a mass of one pound for one second, produces a velocity of one foot per second. A foot-poundal is a unit of energy equal to the energy resulting when a force of one poundal acts through a distance of one foot. In order to reduce foot-poundals to foot-pounds, multiply the number of foot-poundals by 0.03108. Dividing the number of foot-poundals by 32.16 (acceleration due to gravity) will also give foot-pounds. Units of Energy, Power, and Heat Table 44a. Energy Conversion Factors 1 horsepower-hour = 0.746 kilowatt-hour 1,980,000 foot-pounds 2545 Btu (British thermal units) 1 kilowatt-hour = 1000 watt-hours
1.34 horsepower-hour 2,655,200 foot-pounds 3,600,000 joules 3415 Btu 3.54 pounds of water evaporated at 212 ° F 22.8 pounds of water raised from 62 ° to 212 ° F
2.64 pounds of water evaporated at 212 ° F 17 pounds of water raised from 62 ° to 212 ° F
Table 44b. Power Conversion Factors
1 horsepower = 746 watts 0.746 kilowatt 33,000 foot-pounds/minute 550 foot-pounds/second 2545 Btu/hour 42.4 Btu/minute 0.71 Btu/second 2.64 pounds of water evaporated per hour at 212 ° F 1 Btu (British thermal unit) = 1052 watt-seconds 778 foot-pounds 0.252 kilogram-calorie 0.000292 kilowatt-hour 0.000393, horsepower-hour 0.00104 pound of water evaporated at 212 ° F 1 kilogram calorie = 3.968 Btu
1 watt =
1 kilowatt = 1000 watts
1 joule/second 0.00134 horsepower 0.001 kilowatt 3.42 Btu/hour 44.22 foot-pounds/minute 0.74 foot-pounds/second 0.0035 pound of water evaporated per hour at 212 ° F
1.34 horsepower 2,654,200 foot-pounds/hour 44,200 foot-pounds/minute 737 foot-pounds/second 3415 Btu/hour 57 Btu/minute 0.95 Btu/second 3.54 pounds of water evaporated per hour at 212 ° F 1 foot-pound = 1.36 joules 0.000000377 kilowatt-hour 0.00129 Btu 0.0000005 horsepower-hour 1 kilogram-meter = 7.233 foot-pounds
Table 44c. Heat Conversion Factors
1 joule =
1 watt-second 0.00000078 kilowatt-hour 0.00095 Btu 0.74 foot-pound 1 therm =
100,000 Btu (US) 29.3 kilowatt-hour 105.5 megajoule
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