| 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 |
| hartree | 6.1575164452225 × 1023 Eh | 1.2315032890445 × 1024 Eh | 1.8472549335667 × 1024 Eh | 2.463006578089 × 1024 Eh | 3.0787582226112 × 1024 Eh | 3.6945098671335 × 1024 Eh | 4.3102615116557 × 1024 Eh | 4.926013156178 × 1024 Eh | 5.5417648007002 × 1024 Eh | 6.1575164452225 × 1024 Eh | 6.7732680897447 × 1024 Eh | 7.389019734267 × 1024 Eh | 8.0047713787892 × 1024 Eh | 8.6205230233115 × 1024 Eh | 9.2362746678337 × 1024 Eh | 9.852026312356 × 1024 Eh | 1.0467777956878 × 1025 Eh | 1.10835296014 × 1025 Eh | 1.1699281245923 × 1025 Eh | 1.2315032890445 × 1025 Eh | 1.2930784534967 × 1025 Eh | 1.3546536179489 × 1025 Eh | 1.4162287824012 × 1025 Eh | 1.4778039468534 × 1025 Eh | 1.5393791113056 × 1025 Eh | 1.6009542757578 × 1025 Eh | 1.6625294402101 × 1025 Eh | 1.7241046046623 × 1025 Eh | 1.7856797691145 × 1025 Eh | 1.8472549335667 × 1025 Eh | 1.908830098019 × 1025 Eh | 1.9704052624712 × 1025 Eh | 2.0319804269234 × 1025 Eh | 2.0935555913756 × 1025 Eh | 2.1551307558279 × 1025 Eh | 2.2167059202801 × 1025 Eh | 2.2782810847323 × 1025 Eh | 2.3398562491845 × 1025 Eh | 2.4014314136368 × 1025 Eh | 2.463006578089 × 1025 Eh | 2.5245817425412 × 1025 Eh | 2.5861569069934 × 1025 Eh | 2.6477320714457 × 1025 Eh | 2.7093072358979 × 1025 Eh | 2.7708824003501 × 1025 Eh | 2.8324575648023 × 1025 Eh | 2.8940327292546 × 1025 Eh | 2.9556078937068 × 1025 Eh | 3.017183058159 × 1025 Eh | 3.0787582226112 × 1025 Eh | 3.1403333870635 × 1025 Eh | 3.2019085515157 × 1025 Eh | 3.2634837159679 × 1025 Eh | 3.3250588804201 × 1025 Eh | 3.3866340448724 × 1025 Eh | 3.4482092093246 × 1025 Eh | 3.5097843737768 × 1025 Eh | 3.571359538229 × 1025 Eh | 3.6329347026813 × 1025 Eh | 3.6945098671335 × 1025 Eh | 3.7560850315857 × 1025 Eh | 3.8176601960379 × 1025 Eh | 3.8792353604902 × 1025 Eh | 3.9408105249424 × 1025 Eh | 4.0023856893946 × 1025 Eh | 4.0639608538468 × 1025 Eh | 4.1255360182991 × 1025 Eh | 4.1871111827513 × 1025 Eh | 4.2486863472035 × 1025 Eh | 4.3102615116557 × 1025 Eh | 4.371836676108 × 1025 Eh | 4.4334118405602 × 1025 Eh | 4.4949870050124 × 1025 Eh | 4.5565621694646 × 1025 Eh | 4.6181373339169 × 1025 Eh | 4.6797124983691 × 1025 Eh | 4.7412876628213 × 1025 Eh | 4.8028628272735 × 1025 Eh | 4.8644379917258 × 1025 Eh | 4.926013156178 × 1025 Eh | 4.9875883206302 × 1025 Eh | 5.0491634850824 × 1025 Eh | 5.1107386495347 × 1025 Eh | 5.1723138139869 × 1025 Eh | 5.2338889784391 × 1025 Eh | 5.2954641428913 × 1025 Eh | 5.3570393073436 × 1025 Eh | 5.4186144717958 × 1025 Eh | 5.480189636248 × 1025 Eh | 5.5417648007002 × 1025 Eh | 5.6033399651525 × 1025 Eh | 5.6649151296047 × 1025 Eh | 5.7264902940569 × 1025 Eh | 5.7880654585091 × 1025 Eh | 5.8496406229613 × 1025 Eh | 5.9112157874136 × 1025 Eh | 5.9727909518658 × 1025 Eh | 6.034366116318 × 1025 Eh | 6.0959412807702 × 1025 Eh | 6.1575164452225 × 1025 Eh |
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 | hartrees | horsepower-hours | hartrees |
|---|---|---|---|
| 1 | ≈ 6.1575164452225E+23 | 6 | ≈ 3.6945098671335E+24 |
| 2 | ≈ 1.2315032890445E+24 | 7 | ≈ 4.3102615116557E+24 |
| 3 | ≈ 1.8472549335667E+24 | 8 | ≈ 4.926013156178E+24 |
| 4 | ≈ 2.463006578089E+24 | 9 | ≈ 5.5417648007002E+24 |
| 5 | ≈ 3.0787582226112E+24 | 10 | ≈ 6.1575164452225E+24 |
The hartree (symbol: Eh or Ha), also known as the Hartree energy, is the atomic unit of energy, named after the British physicist Douglas Hartree.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| hartree | Eh | ≡ me·α2·c2 (= 2 Ry) | ≈ 4.359744×10−18 J | Metric system Non-SI |
| hartrees | horsepower-hours | hartrees | horsepower-hours |
|---|---|---|---|
| 1 | ≈ 1.6240313913833E-24 | 6 | ≈ 9.7441883482996E-24 |
| 2 | ≈ 3.2480627827665E-24 | 7 | ≈ 1.1368219739683E-23 |
| 3 | ≈ 4.8720941741498E-24 | 8 | ≈ 1.2992251131066E-23 |
| 4 | ≈ 6.4961255655331E-24 | 9 | ≈ 1.4616282522449E-23 |
| 5 | ≈ 8.1201569569163E-24 | 10 | ≈ 1.6240313913833E-23 |
| horsepower-hours | hartrees |
|---|---|
| 1 | ≈ 6.1575164452225 × 1023 |
| 1.6240313913833 × 10-24 | ≈ 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 …) |