| 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 |
| megajoule | 2.6845195 MJ | 5.3690391 MJ | 8.0535586 MJ | 10.7380782 MJ | 13.4225977 MJ | 16.1071172 MJ | 18.7916368 MJ | 21.4761563 MJ | 24.1606758 MJ | 26.8451954 MJ | 29.5297149 MJ | 32.2142345 MJ | 34.8987540 MJ | 37.5832735 MJ | 40.2677931 MJ | 42.9523126 MJ | 45.6368321 MJ | 48.3213517 MJ | 51.0058712 MJ | 53.6903908 MJ | 56.3749103 MJ | 59.0594298 MJ | 61.7439494 MJ | 64.4284689 MJ | 67.1129884 MJ | 69.7975080 MJ | 72.4820275 MJ | 75.1665471 MJ | 77.8510666 MJ | 80.5355861 MJ | 83.2201057 MJ | 85.9046252 MJ | 88.5891447 MJ | 91.2736643 MJ | 93.9581838 MJ | 96.6427034 MJ | 99.3272229 MJ | 102.0117424 MJ | 104.6962620 MJ | 107.3807815 MJ | 110.0653010 MJ | 112.7498206 MJ | 115.4343401 MJ | 118.1188597 MJ | 120.8033792 MJ | 123.4878987 MJ | 126.1724183 MJ | 128.8569378 MJ | 131.5414573 MJ | 134.2259769 MJ | 136.9104964 MJ | 139.5950160 MJ | 142.2795355 MJ | 144.9640550 MJ | 147.6485746 MJ | 150.3330941 MJ | 153.0176136 MJ | 155.7021332 MJ | 158.3866527 MJ | 161.0711723 MJ | 163.7556918 MJ | 166.4402113 MJ | 169.1247309 MJ | 171.8092504 MJ | 174.4937700 MJ | 177.1782895 MJ | 179.8628090 MJ | 182.5473286 MJ | 185.2318481 MJ | 187.9163676 MJ | 190.6008872 MJ | 193.2854067 MJ | 195.9699263 MJ | 198.6544458 MJ | 201.3389653 MJ | 204.0234849 MJ | 206.7080044 MJ | 209.3925239 MJ | 212.0770435 MJ | 214.7615630 MJ | 217.4460826 MJ | 220.1306021 MJ | 222.8151216 MJ | 225.4996412 MJ | 228.1841607 MJ | 230.8686802 MJ | 233.5531998 MJ | 236.2377193 MJ | 238.9222389 MJ | 241.6067584 MJ | 244.2912779 MJ | 246.9757975 MJ | 249.6603170 MJ | 252.3448365 MJ | 255.0293561 MJ | 257.7138756 MJ | 260.3983952 MJ | 263.0829147 MJ | 265.7674342 MJ | 268.4519538 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 = 2.684519537696 megajoules | 6 horsepower-hours = 16.107117226176 megajoules |
| 2 horsepower-hours = 5.369039075392 megajoules | 7 horsepower-hours = 18.791636763872 megajoules |
| 3 horsepower-hours = 8.053558613088 megajoules | 8 horsepower-hours = 21.476156301568 megajoules |
| 4 horsepower-hours = 10.738078150784 megajoules | 9 horsepower-hours = 24.160675839264 megajoules |
| 5 horsepower-hours = 13.42259768848 megajoules | 10 horsepower-hours = 26.84519537696 megajoules |
The megajoule (MJ) is equal to one million (106) joules, or approximately the kinetic energy of a one megagram (tonne) vehicle moving at 161 km/h.
| 1 megajoules = 0.37250613599864 horsepower-hours | 6 megajoules = 2.2350368159919 horsepower-hours |
| 2 megajoules = 0.74501227199729 horsepower-hours | 7 megajoules = 2.6075429519905 horsepower-hours |
| 3 megajoules = 1.1175184079959 horsepower-hours | 8 megajoules = 2.9800490879891 horsepower-hours |
| 4 megajoules = 1.4900245439946 horsepower-hours | 9 megajoules = 3.3525552239878 horsepower-hours |
| 5 megajoules = 1.8625306799932 horsepower-hours | 10 megajoules = 3.7250613599864 horsepower-hours |
| 1 horsepower-hours = 2.6845195 megajoules |
| 1 megajoules = 0.3725061 horsepower-hours |