| zeptojoule | 1 zJ | 2 zJ | 3 zJ | 4 zJ | 5 zJ | 6 zJ | 7 zJ | 8 zJ | 9 zJ | 10 zJ | 11 zJ | 12 zJ | 13 zJ | 14 zJ | 15 zJ | 16 zJ | 17 zJ | 18 zJ | 19 zJ | 20 zJ | 21 zJ | 22 zJ | 23 zJ | 24 zJ | 25 zJ | 26 zJ | 27 zJ | 28 zJ | 29 zJ | 30 zJ | 31 zJ | 32 zJ | 33 zJ | 34 zJ | 35 zJ | 36 zJ | 37 zJ | 38 zJ | 39 zJ | 40 zJ | 41 zJ | 42 zJ | 43 zJ | 44 zJ | 45 zJ | 46 zJ | 47 zJ | 48 zJ | 49 zJ | 50 zJ | 51 zJ | 52 zJ | 53 zJ | 54 zJ | 55 zJ | 56 zJ | 57 zJ | 58 zJ | 59 zJ | 60 zJ | 61 zJ | 62 zJ | 63 zJ | 64 zJ | 65 zJ | 66 zJ | 67 zJ | 68 zJ | 69 zJ | 70 zJ | 71 zJ | 72 zJ | 73 zJ | 74 zJ | 75 zJ | 76 zJ | 77 zJ | 78 zJ | 79 zJ | 80 zJ | 81 zJ | 82 zJ | 83 zJ | 84 zJ | 85 zJ | 86 zJ | 87 zJ | 88 zJ | 89 zJ | 90 zJ | 91 zJ | 92 zJ | 93 zJ | 94 zJ | 95 zJ | 96 zJ | 97 zJ | 98 zJ | 99 zJ | 100 zJ |
| horsepower-hour | 3.7250613599864 × 10-28 hp·h | 7.4501227199729 × 10-28 hp·h | 1.1175184079959 × 10-27 hp·h | 1.4900245439946 × 10-27 hp·h | 1.8625306799932 × 10-27 hp·h | 2.2350368159919 × 10-27 hp·h | 2.6075429519905 × 10-27 hp·h | 2.9800490879891 × 10-27 hp·h | 3.3525552239878 × 10-27 hp·h | 3.7250613599864 × 10-27 hp·h | 4.0975674959851 × 10-27 hp·h | 4.4700736319837 × 10-27 hp·h | 4.8425797679824 × 10-27 hp·h | 5.215085903981 × 10-27 hp·h | 5.5875920399796 × 10-27 hp·h | 5.9600981759783 × 10-27 hp·h | 6.3326043119769 × 10-27 hp·h | 6.7051104479756 × 10-27 hp·h | 7.0776165839742 × 10-27 hp·h | 7.4501227199729 × 10-27 hp·h | 7.8226288559715 × 10-27 hp·h | 8.1951349919701 × 10-27 hp·h | 8.5676411279688 × 10-27 hp·h | 8.9401472639674 × 10-27 hp·h | 9.3126533999661 × 10-27 hp·h | 9.6851595359647 × 10-27 hp·h | 1.0057665671963 × 10-26 hp·h | 1.0430171807962 × 10-26 hp·h | 1.0802677943961 × 10-26 hp·h | 1.1175184079959 × 10-26 hp·h | 1.1547690215958 × 10-26 hp·h | 1.1920196351957 × 10-26 hp·h | 1.2292702487955 × 10-26 hp·h | 1.2665208623954 × 10-26 hp·h | 1.3037714759952 × 10-26 hp·h | 1.3410220895951 × 10-26 hp·h | 1.378272703195 × 10-26 hp·h | 1.4155233167948 × 10-26 hp·h | 1.4527739303947 × 10-26 hp·h | 1.4900245439946 × 10-26 hp·h | 1.5272751575944 × 10-26 hp·h | 1.5645257711943 × 10-26 hp·h | 1.6017763847942 × 10-26 hp·h | 1.639026998394 × 10-26 hp·h | 1.6762776119939 × 10-26 hp·h | 1.7135282255938 × 10-26 hp·h | 1.7507788391936 × 10-26 hp·h | 1.7880294527935 × 10-26 hp·h | 1.8252800663933 × 10-26 hp·h | 1.8625306799932 × 10-26 hp·h | 1.8997812935931 × 10-26 hp·h | 1.9370319071929 × 10-26 hp·h | 1.9742825207928 × 10-26 hp·h | 2.0115331343927 × 10-26 hp·h | 2.0487837479925 × 10-26 hp·h | 2.0860343615924 × 10-26 hp·h | 2.1232849751923 × 10-26 hp·h | 2.1605355887921 × 10-26 hp·h | 2.197786202392 × 10-26 hp·h | 2.2350368159919 × 10-26 hp·h | 2.2722874295917 × 10-26 hp·h | 2.3095380431916 × 10-26 hp·h | 2.3467886567914 × 10-26 hp·h | 2.3840392703913 × 10-26 hp·h | 2.4212898839912 × 10-26 hp·h | 2.458540497591 × 10-26 hp·h | 2.4957911111909 × 10-26 hp·h | 2.5330417247908 × 10-26 hp·h | 2.5702923383906 × 10-26 hp·h | 2.6075429519905 × 10-26 hp·h | 2.6447935655904 × 10-26 hp·h | 2.6820441791902 × 10-26 hp·h | 2.7192947927901 × 10-26 hp·h | 2.75654540639 × 10-26 hp·h | 2.7937960199898 × 10-26 hp·h | 2.8310466335897 × 10-26 hp·h | 2.8682972471895 × 10-26 hp·h | 2.9055478607894 × 10-26 hp·h | 2.9427984743893 × 10-26 hp·h | 2.9800490879891 × 10-26 hp·h | 3.017299701589 × 10-26 hp·h | 3.0545503151889 × 10-26 hp·h | 3.0918009287887 × 10-26 hp·h | 3.1290515423886 × 10-26 hp·h | 3.1663021559885 × 10-26 hp·h | 3.2035527695883 × 10-26 hp·h | 3.2408033831882 × 10-26 hp·h | 3.2780539967881 × 10-26 hp·h | 3.3153046103879 × 10-26 hp·h | 3.3525552239878 × 10-26 hp·h | 3.3898058375876 × 10-26 hp·h | 3.4270564511875 × 10-26 hp·h | 3.4643070647874 × 10-26 hp·h | 3.5015576783872 × 10-26 hp·h | 3.5388082919871 × 10-26 hp·h | 3.576058905587 × 10-26 hp·h | 3.6133095191868 × 10-26 hp·h | 3.6505601327867 × 10-26 hp·h | 3.6878107463866 × 10-26 hp·h | 3.7250613599864 × 10-26 hp·h |
The zeptojoule (zJ) is equal to one sextillionth (10−21) of one joule. 160 zeptojoules is about one electronvolt.
| 1 zeptojoules = 3.7250613599864E-28 horsepower-hours | 6 zeptojoules = 2.2350368159919E-27 horsepower-hours |
| 2 zeptojoules = 7.4501227199729E-28 horsepower-hours | 7 zeptojoules = 2.6075429519905E-27 horsepower-hours |
| 3 zeptojoules = 1.1175184079959E-27 horsepower-hours | 8 zeptojoules = 2.9800490879891E-27 horsepower-hours |
| 4 zeptojoules = 1.4900245439946E-27 horsepower-hours | 9 zeptojoules = 3.3525552239878E-27 horsepower-hours |
| 5 zeptojoules = 1.8625306799932E-27 horsepower-hours | 10 zeptojoules = 3.7250613599864E-27 horsepower-hours |
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 = 2.684519537696E+27 zeptojoules | 6 horsepower-hours = 1.6107117226176E+28 zeptojoules |
| 2 horsepower-hours = 5.369039075392E+27 zeptojoules | 7 horsepower-hours = 1.8791636763872E+28 zeptojoules |
| 3 horsepower-hours = 8.053558613088E+27 zeptojoules | 8 horsepower-hours = 2.1476156301568E+28 zeptojoules |
| 4 horsepower-hours = 1.0738078150784E+28 zeptojoules | 9 horsepower-hours = 2.4160675839264E+28 zeptojoules |
| 5 horsepower-hours = 1.342259768848E+28 zeptojoules | 10 horsepower-hours = 2.684519537696E+28 zeptojoules |
| 1 zeptojoules = 3.7250613599864 × 10-28 horsepower-hours |
| 1 horsepower-hours = 2.684519537696 × 1027 zeptojoules |