| 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 |
| calorie | 641,615.5682830 calth | 1,283,231.136566 calth | 1,924,846.7048489 calth | 2,566,462.2731319 calth | 3,208,077.8414149 calth | 3,849,693.4096979 calth | 4,491,308.9779809 calth | 5,132,924.5462639 calth | 5,774,540.1145468 calth | 6,416,155.6828298 calth | 7,057,771.2511128 calth | 7,699,386.8193958 calth | 8,341,002.3876788 calth | 8,982,617.9559618 calth | 9,624,233.5242447 calth | 10,265,849.092528 calth | 10,907,464.660811 calth | 11,549,080.229094 calth | 12,190,695.797377 calth | 12,832,311.36566 calth | 13,473,926.933943 calth | 14,115,542.502226 calth | 14,757,158.070509 calth | 15,398,773.638792 calth | 16,040,389.207075 calth | 16,682,004.775358 calth | 17,323,620.343641 calth | 17,965,235.911924 calth | 18,606,851.480207 calth | 19,248,467.048489 calth | 19,890,082.616772 calth | 20,531,698.185055 calth | 21,173,313.753338 calth | 21,814,929.321621 calth | 22,456,544.889904 calth | 23,098,160.458187 calth | 23,739,776.02647 calth | 24,381,391.594753 calth | 25,023,007.163036 calth | 25,664,622.731319 calth | 26,306,238.299602 calth | 26,947,853.867885 calth | 27,589,469.436168 calth | 28,231,085.004451 calth | 28,872,700.572734 calth | 29,514,316.141017 calth | 30,155,931.7093 calth | 30,797,547.277583 calth | 31,439,162.845866 calth | 32,080,778.414149 calth | 32,722,393.982432 calth | 33,364,009.550715 calth | 34,005,625.118998 calth | 34,647,240.687281 calth | 35,288,856.255564 calth | 35,930,471.823847 calth | 36,572,087.39213 calth | 37,213,702.960413 calth | 37,855,318.528696 calth | 38,496,934.096979 calth | 39,138,549.665262 calth | 39,780,165.233545 calth | 40,421,780.801828 calth | 41,063,396.370111 calth | 41,705,011.938394 calth | 42,346,627.506677 calth | 42,988,243.07496 calth | 43,629,858.643243 calth | 44,271,474.211526 calth | 44,913,089.779809 calth | 45,554,705.348092 calth | 46,196,320.916375 calth | 46,837,936.484658 calth | 47,479,552.052941 calth | 48,121,167.621224 calth | 48,762,783.189507 calth | 49,404,398.75779 calth | 50,046,014.326073 calth | 50,687,629.894356 calth | 51,329,245.462639 calth | 51,970,861.030922 calth | 52,612,476.599205 calth | 53,254,092.167488 calth | 53,895,707.735771 calth | 54,537,323.304054 calth | 55,178,938.872337 calth | 55,820,554.44062 calth | 56,462,170.008902 calth | 57,103,785.577185 calth | 57,745,401.145468 calth | 58,387,016.713751 calth | 59,028,632.282034 calth | 59,670,247.850317 calth | 60,311,863.4186 calth | 60,953,478.986883 calth | 61,595,094.555166 calth | 62,236,710.123449 calth | 62,878,325.691732 calth | 63,519,941.260015 calth | 64,161,556.828298 calth |
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):
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| horsepower-hour | hp·h | ≡ 1 hp × 1 h | = 2.684519537696172792×106 J | Metric system Non-SI |
| horsepower-hours | calories | horsepower-hours | calories |
|---|---|---|---|
| 1 | = 641615.56828298 | 6 | = 3849693.4096979 |
| 2 | = 1283231.136566 | 7 | = 4491308.9779809 |
| 3 | = 1924846.7048489 | 8 | = 5132924.5462639 |
| 4 | = 2566462.2731319 | 9 | = 5774540.1145468 |
| 5 | = 3208077.8414149 | 10 | = 6416155.6828298 |
Calories are units of energy. Various definitions exist but fall into two broad categories. The first, the small calorie, or gram calorie (symbol: cal), is defined as the approximate amount of energy needed to raise the temperature of one gram of water by one degree Celsius at a pressure of one atmosphere.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| calorie | calth | ≡ 4.184 J | = 4.184 J | Metric system SI |
| calories | horsepower-hours | calories | horsepower-hours |
|---|---|---|---|
| 1 | = 1.5585656730183E-6 | 6 | = 9.3513940381099E-6 |
| 2 | = 3.1171313460366E-6 | 7 | = 1.0909959711128E-5 |
| 3 | = 4.675697019055E-6 | 8 | = 1.2468525384147E-5 |
| 4 | = 6.2342626920733E-6 | 9 | = 1.4027091057165E-5 |
| 5 | = 7.7928283650916E-6 | 10 | = 1.5585656730183E-5 |
| horsepower-hours | calories |
|---|---|
| 1 | = 641,615.5682830 |
| 1.5585656730183 × 10-6 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |