Machinery's Handbook, 31st Edition
2866
Energy, Power, and Heat Conversion Factors Table 45a. British Thermal Units to Foot-Pounds
Btu
ft-lb
Btu
ft-lb 7,783 15,565 23,348 31,130 38,913 46,696 54,478 62,261 70,043 77,826
Btu
ft-lb 778 1,557 2,335 3,113 3,891 4,670 5,448 6,226 7,004 7,783
Btu 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
ft-lb 78 156 233 311 389 467 545 623 700 778
Btu
ft-lb
100 200 300 400 500 600 700 800 900
77,826 155,652 233,478 311,304 389,130 466,956 544,782 622,608 700,434
10 20 30 40 50 60 70 80
1 2 3 4 5 6 7 8 9
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
8
16 23 31 39 47 54 62 70
90 100
1,000 778,260 78 1 Btu = 778.26 ft-lb, conversion factor defined by International Steam Table Conference, 1929. Table 45b. Foot-Pounds to British Thermal Units ft-lb Btu ft-lb Btu ft-lb Btu ft-lb Btu ft-lb Btu 10,000 12.849 1,000 1.285 100 0.128 10 0.013 1 0.001 20,000 25.698 2,000 2.570 200 0.257 20 0.026 2 0.003 30,000 38.548 3,000 3.855 300 0.385 30 0.039 3 0.004 40,000 51.397 4,000 5.140 400 0.514 40 0.051 4 0.005 50,000 64.246 5,000 6.425 500 0.642 50 0.064 5 0.006 60,000 77.095 6,000 7.710 600 0.771 60 0.077 6 0.008 70,000 89.944 7,000 8.994 700 0.899 70 0.090 7 0.009 80,000 102.794 8,000 10.279 800 1.028 80 0.103 8 0.010 90,000 115.643 9,000 11.564 900 1.156 90 0.116 9 0.012 100,000 128.492 10,000 12.849 1,000 1.285 100 0.128 10 0.013 1 ft-lb = 0.00128492 Btu, conversion factor defined by International Steam Table Conference, 1929. Table 46a. British Thermal Units to Kilojoules Btu → ↓ 0 100 200 300 400 500 600 700 800 900 kilojoules 0 … 105.51 211.01 316.52 422.02 527.53 633.03 738.54 844.04 949.55 1000 1055.06 1160.56 1266.07 1371.57 1477.08 1582.58 1688.09 1793.60 1899.10 2004.61 2000 2110.11 2215.62 2321.12 2426.63 2532.13 2637.64 2743.15 2848.65 2954.16 3059.66 3000 3165.17 3270.67 3376.18 3481.68 3587.19 3692.70 3798.20 3903.71 4009.21 4114.72 4000 4220.22 4325.73 4431.24 4536.74 4642.25 4747.75 4853.26 4958.76 5064.27 5169.77 5000 5275.28 5380.79 5486.29 5591.80 5697.30 5802.81 5908.31 6013.82 6119.32 6224.83 6000 6330.34 6435.84 6541.35 6646.85 6752.36 6857.86 6963.37 7068.88 7174.38 7279.89 7000 7385.39 7490.90 7596.40 7701.91 7807.41 7912.92 8018.43 8123.93 8229.44 8334.94 8000 8440.45 8545.95 8651.46 8756.96 8862.47 8967.98 9073.48 9178.99 9284.49 9390.00 9000 9495.50 9601.01 9706.52 9812.02 9917.53 10023.0 10128.5 10234.0 10339.5 10445.1 10,000 10550.6 … … … … … … … … … 1 Btu = 1055.056 joules Table 46b. Kilojoules to British Thermal Units kJ → ↓ 0 100 200 300 400 500 600 700 800 900 British Thermal Units 0 … 94.78 189.56 284.35 379.13 473.91 568.69 663.47 758.25 853.04 1000 947.82 1042.60 1137.38 1232.16 1326.94 1421.73 1516.51 1611.29 1706.07 1800.85 2000 1895.63 1990.42 2085.20 2179.98 2274.76 2369.54 2464.32 2559.11 2653.89 2748.67 3000 2843.45 2938.23 3033.01 3127.80 3222.58 3317.36 3412.14 3506.92 3601.70 3696.49 4000 3791.27 3886.05 3980.83 4075.61 4170.39 4265.18 4359.96 4454.74 4549.52 4644.30 5000 4739.08 4833.87 4928.65 5023.43 5118.21 5212.99 5307.78 5402.56 5497.34 5592.12 6000 5686.90 5781.68 5876.47 5971.25 6066.03 6160.81 6255.59 6350.37 6445.16 6539.94 7000 6634.72 6729.50 6824.28 6919.06 7013.85 7108.63 7203.41 7298.19 7392.97 7487.75 8000 7582.54 7677.32 7772.10 7866.88 7961.66 8056.44 8151.23 8246.01 8340.79 8435.57 9000 8530.35 8625.13 8719.92 8814.70 8909.48 9004.26 9099.04 9193.82 9288.61 9383.39 10,000 9478.17 … … … … … … … … … 1 joule = 0.0009478170 Btu 10
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