Machinery's Handbook, 31st Edition
Energy, Power, and Heat Conversion Factors
2867
Table 47a. Horsepower to Kilowatts Conversion
hp
kW
hp
kW 74.6 149.1 223.7 298.3 372.8 447.4 522.0 596.6 671.1 745.7
hp
kW 7.5 14.9 22.4 29.8 37.3 44.7 52.2 59.7 67.1 74.6
hp
kW
hp
kW
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000
745.7 1,491.4 2,237.1 2,982.8 3,728.5 4,474.2 5,219.9 5,965.6 6,711.3 7,457.0
100 200 300 400 500 600 700 800
10 20 30 40 50 60 70 80
1 2 3 4 5 6 7 8 9
0.7 1.5 2.2 3.0 3.7 4.5 5.2 6.0 6.7 7.5
0.1 0.07 0.2 0.15 0.3 0.22 0.4 0.30 0.5 0.37 0.6 0.45 0.7 0.52 0.8 0.60 0.9 0.67 1.0 0.75
900 1,000
90 100
10
1 hp = 0.7456999 kW, based on 1 horsepower = 550 foot-pounds per second. Table 47b. Kilowatts to Horsepower Conversion kW hp kW hp kW hp kW hp kW
hp
1,000 2,000 3,000 4,000 5,000 7,000
1,341.0 2,682.0 4,023.1 5,364.1 6,705.1 9,387.2
100 200 300 400 500 700 800 900
134.1 268.2 402.3 536.4
10 20 30 40 50 70 80 90
13.4 26.8 40.2 53.6 67.1 93.9 107.3 120.7 134.1
1 2 3 4 5 7 8 9
1.3 2.7 4.0 5.4
0.1 0.13 0.2 0.27 0.3 0.40 0.4 0.54 0.5 0.67 0.7 0.94 0.8 1.07 0.9 1.21 1.0 1.34
670.5 938.7 1,072.8 1,206.9 1,341.0
6.7 9.4 10.7 12.1 13.4
8,000 10,728.2 9,000 12,069.2 10,000 13,410.2
1,000
100
10
1 kW = 1.341022 hp, based on 1 horsepower = 550 foot-pounds per second. Table 48a. Foot-Pounds to Joules Conversion ft-lb → ↓ 0 1 2 3 4 5 6 7
9
8
joules
0
… 1.356 2.712 4.067 5.423 6.779 8.135 9.491 10.847 12.202 13.558 14.914 16.270 17.626 18.981 20.337 21.693 23.049 24.405 25.761 27.116 28.472 29.828 31.184 32.540 33.895 35.251 36.607 37.963 39.319 40.675 42.030 43.386 44.742 46.098 47.454 48.809 50.165 51.521 52.877 54.233 55.589 56.944 58.300 59.656 61.012 62.368 63.723 65.079 66.435 67.791 69.147 70.503 71.858 73.214 74.570 75.926 77.282 78.637 79.993 81.349 82.705 84.061 85.417 86.772 88.128 89.484 90.840 92.196 93.551 94.907 96.263 97.619 98.975 100.331 101.686 103.042 104.398 105.754 107.110
10 20 30 40 50 60 70
80 108.465 109.821 111.177 112.533 113.889 115.245 116.600 117.956 119.312 120.668 90 122.024 123.379 124.735 126.091 127.447 128.803 130.159 131.514 132.870 134.226 100 135.582 136.938 138.293 139.649 141.005 142.361 143.717 145.073 146.428 147.784 1 foot-pound = 1.355818 joules Table 48b. Joules to Foot-Pounds Conversion J → ↓ 0 1 2 3 4 5 6 7 8 9 foot-pounds 0 … 0.7376 1.4751 2.2127 2.9502 3.6878 4.4254 5.1629 5.9005 6.6381 10 7.3756 8.1132 8.8507 9.5883 10.3259 11.0634 11.8010 12.5386 13.2761 14.0137 20 14.7512 15.4888 16.2264 16.9639 17.7015 18.4391 19.1766 19.4142 20.6517 21.3893 30 22.1269 22.8644 23.6020 24.3395 25.0771 25.8147 26.5522 27.2898 28.0274 28.7649 40 29.5025 30.2400 30.9776 31.7152 32.4527 33.1903 33.9279 34.6654 35.4030 36.1405 50 36.8781 37.6157 38.3532 39.0908 39.8284 40.5659 41.3035 42.0410 42.7786 43.5162 60 44.2537 44.9913 45.7289 46.4664 47.2040 47.9415 48.6791 49.4167 50.1542 50.8918 70 51.6293 52.3669 53.1045 53.8420 54.5796 55.3172 56.0547 56.7923 57.5298 58.2674 80 59.0050 59.7425 60.4801 61.2177 61.9552 62.6928 63.4303 64.1679 64.9055 65.6430 90 66.3806 67.1182 67.8557 68.5933 69.3308 70.0684 70.8060 71.5435 72.2811 73.0186 100 73.7562 74.4938 75.2313 75.9689 76.7065 77.4440 78.1816 78.9191 79.6567 80.3943 1 joule = 0.7375621 foot-pound
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