| horsepower-hour | 1 hp·h | 2 hp·h | 3 hp·h | 4 hp·h | 5 hp·h | 6 hp·h | 7 hp·h | 8 hp·h | 9 hp·h | 10 hp·h | 11 hp·h | 12 hp·h | 13 hp·h | 14 hp·h | 15 hp·h | 16 hp·h | 17 hp·h | 18 hp·h | 19 hp·h | 20 hp·h | 21 hp·h | 22 hp·h | 23 hp·h | 24 hp·h | 25 hp·h | 26 hp·h | 27 hp·h | 28 hp·h | 29 hp·h | 30 hp·h | 31 hp·h | 32 hp·h | 33 hp·h | 34 hp·h | 35 hp·h | 36 hp·h | 37 hp·h | 38 hp·h | 39 hp·h | 40 hp·h | 41 hp·h | 42 hp·h | 43 hp·h | 44 hp·h | 45 hp·h | 46 hp·h | 47 hp·h | 48 hp·h | 49 hp·h | 50 hp·h | 51 hp·h | 52 hp·h | 53 hp·h | 54 hp·h | 55 hp·h | 56 hp·h | 57 hp·h | 58 hp·h | 59 hp·h | 60 hp·h | 61 hp·h | 62 hp·h | 63 hp·h | 64 hp·h | 65 hp·h | 66 hp·h | 67 hp·h | 68 hp·h | 69 hp·h | 70 hp·h | 71 hp·h | 72 hp·h | 73 hp·h | 74 hp·h | 75 hp·h | 76 hp·h | 77 hp·h | 78 hp·h | 79 hp·h | 80 hp·h | 81 hp·h | 82 hp·h | 83 hp·h | 84 hp·h | 85 hp·h | 86 hp·h | 87 hp·h | 88 hp·h | 89 hp·h | 90 hp·h | 91 hp·h | 92 hp·h | 93 hp·h | 94 hp·h | 95 hp·h | 96 hp·h | 97 hp·h | 98 hp·h | 99 hp·h | 100 hp·h |
| millijoule | 2,684,519,537.696 mJ | 5,369,039,075.392 mJ | 8,053,558,613.088 mJ | 10,738,078,150.784 mJ | 13,422,597,688.48 mJ | 16,107,117,226.176 mJ | 18,791,636,763.872 mJ | 21,476,156,301.568 mJ | 24,160,675,839.264 mJ | 26,845,195,376.96 mJ | 29,529,714,914.656 mJ | 32,214,234,452.352 mJ | 34,898,753,990.048 mJ | 37,583,273,527.744 mJ | 40,267,793,065.44 mJ | 42,952,312,603.136 mJ | 45,636,832,140.832 mJ | 48,321,351,678.528 mJ | 51,005,871,216.224 mJ | 53,690,390,753.92 mJ | 56,374,910,291.616 mJ | 59,059,429,829.312 mJ | 61,743,949,367.008 mJ | 64,428,468,904.704 mJ | 67,112,988,442.4 mJ | 69,797,507,980.096 mJ | 72,482,027,517.792 mJ | 75,166,547,055.488 mJ | 77,851,066,593.184 mJ | 80,535,586,130.88 mJ | 83,220,105,668.576 mJ | 85,904,625,206.272 mJ | 88,589,144,743.968 mJ | 91,273,664,281.664 mJ | 93,958,183,819.36 mJ | 96,642,703,357.056 mJ | 99,327,222,894.752 mJ | 102,011,742,432.45 mJ | 104,696,261,970.14 mJ | 107,380,781,507.84 mJ | 110,065,301,045.54 mJ | 112,749,820,583.23 mJ | 115,434,340,120.93 mJ | 118,118,859,658.62 mJ | 120,803,379,196.32 mJ | 123,487,898,734.02 mJ | 126,172,418,271.71 mJ | 128,856,937,809.41 mJ | 131,541,457,347.1 mJ | 134,225,976,884.8 mJ | 136,910,496,422.5 mJ | 139,595,015,960.19 mJ | 142,279,535,497.89 mJ | 144,964,055,035.58 mJ | 147,648,574,573.28 mJ | 150,333,094,110.98 mJ | 153,017,613,648.67 mJ | 155,702,133,186.37 mJ | 158,386,652,724.06 mJ | 161,071,172,261.76 mJ | 163,755,691,799.46 mJ | 166,440,211,337.15 mJ | 169,124,730,874.85 mJ | 171,809,250,412.54 mJ | 174,493,769,950.24 mJ | 177,178,289,487.94 mJ | 179,862,809,025.63 mJ | 182,547,328,563.33 mJ | 185,231,848,101.02 mJ | 187,916,367,638.72 mJ | 190,600,887,176.42 mJ | 193,285,406,714.11 mJ | 195,969,926,251.81 mJ | 198,654,445,789.5 mJ | 201,338,965,327.2 mJ | 204,023,484,864.9 mJ | 206,708,004,402.59 mJ | 209,392,523,940.29 mJ | 212,077,043,477.98 mJ | 214,761,563,015.68 mJ | 217,446,082,553.38 mJ | 220,130,602,091.07 mJ | 222,815,121,628.77 mJ | 225,499,641,166.46 mJ | 228,184,160,704.16 mJ | 230,868,680,241.86 mJ | 233,553,199,779.55 mJ | 236,237,719,317.25 mJ | 238,922,238,854.94 mJ | 241,606,758,392.64 mJ | 244,291,277,930.34 mJ | 246,975,797,468.03 mJ | 249,660,317,005.73 mJ | 252,344,836,543.42 mJ | 255,029,356,081.12 mJ | 257,713,875,618.82 mJ | 260,398,395,156.51 mJ | 263,082,914,694.21 mJ | 265,767,434,231.9 mJ | 268,451,953,769.6 mJ |
A horsepower-hour (hph) is an outdated unit of energy, not used in the SI system of units. The unit represents an amount of work a horse is supposed capable of delivering during an hour (1 (one) horsepower integrated over a time interval of an hour). Based on differences in the definition of what constitutes the 'power of a horse', a horsepower-hour differs slightly from the German "Pferdestärkenstunde" (PSh):
| 1 horsepower-hours = 2684519537.696 millijoules | 6 horsepower-hours = 16107117226.176 millijoules |
| 2 horsepower-hours = 5369039075.392 millijoules | 7 horsepower-hours = 18791636763.872 millijoules |
| 3 horsepower-hours = 8053558613.088 millijoules | 8 horsepower-hours = 21476156301.568 millijoules |
| 4 horsepower-hours = 10738078150.784 millijoules | 9 horsepower-hours = 24160675839.264 millijoules |
| 5 horsepower-hours = 13422597688.48 millijoules | 10 horsepower-hours = 26845195376.96 millijoules |
The millijoule (mJ) is equal to one thousandth (10−3) of a joule.
| 1 millijoules = 3.7250613599864E-10 horsepower-hours | 6 millijoules = 2.2350368159919E-9 horsepower-hours |
| 2 millijoules = 7.4501227199729E-10 horsepower-hours | 7 millijoules = 2.6075429519905E-9 horsepower-hours |
| 3 millijoules = 1.1175184079959E-9 horsepower-hours | 8 millijoules = 2.9800490879891E-9 horsepower-hours |
| 4 millijoules = 1.4900245439946E-9 horsepower-hours | 9 millijoules = 3.3525552239878E-9 horsepower-hours |
| 5 millijoules = 1.8625306799932E-9 horsepower-hours | 10 millijoules = 3.7250613599864E-9 horsepower-hours |
| 1 horsepower-hours = 2,684,519,537.696 millijoules |
| 1 millijoules = 3.7250613599864 × 10-10 horsepower-hours |