| quad | 1 quad | 2 quad | 3 quad | 4 quad | 5 quad | 6 quad | 7 quad | 8 quad | 9 quad | 10 quad | 11 quad | 12 quad | 13 quad | 14 quad | 15 quad | 16 quad | 17 quad | 18 quad | 19 quad | 20 quad | 21 quad | 22 quad | 23 quad | 24 quad | 25 quad | 26 quad | 27 quad | 28 quad | 29 quad | 30 quad | 31 quad | 32 quad | 33 quad | 34 quad | 35 quad | 36 quad | 37 quad | 38 quad | 39 quad | 40 quad | 41 quad | 42 quad | 43 quad | 44 quad | 45 quad | 46 quad | 47 quad | 48 quad | 49 quad | 50 quad | 51 quad | 52 quad | 53 quad | 54 quad | 55 quad | 56 quad | 57 quad | 58 quad | 59 quad | 60 quad | 61 quad | 62 quad | 63 quad | 64 quad | 65 quad | 66 quad | 67 quad | 68 quad | 69 quad | 70 quad | 71 quad | 72 quad | 73 quad | 74 quad | 75 quad | 76 quad | 77 quad | 78 quad | 79 quad | 80 quad | 81 quad | 82 quad | 83 quad | 84 quad | 85 quad | 86 quad | 87 quad | 88 quad | 89 quad | 90 quad | 91 quad | 92 quad | 93 quad | 94 quad | 95 quad | 96 quad | 97 quad | 98 quad | 99 quad | 100 quad |
| horsepower-hour | 393,014,778,922.23 hp·h | 786,029,557,844.46 hp·h | 1,179,044,336,766.7 hp·h | 1,572,059,115,688.9 hp·h | 1,965,073,894,611.1 hp·h | 2,358,088,673,533.4 hp·h | 2,751,103,452,455.6 hp·h | 3,144,118,231,377.8 hp·h | 3,537,133,010,300.1 hp·h | 3,930,147,789,222.3 hp·h | 4,323,162,568,144.5 hp·h | 4,716,177,347,066.8 hp·h | 5 109 192 125 989 hp·h | 5,502,206,904,911.2 hp·h | 5,895,221,683,833.4 hp·h | 6,288,236,462,755.7 hp·h | 6,681,251,241,677.9 hp·h | 7,074,266,020,600.1 hp·h | 7,467,280,799,522.4 hp·h | 7,860,295,578,444.6 hp·h | 8,253,310,357,366.8 hp·h | 8,646,325,136,289.1 hp·h | 9,039,339,915,211.3 hp·h | 9,432,354,694,133.5 hp·h | 9,825,369,473,055.7 hp·h | 10 218 384 251 978 hp·h | 10 611 399 030 900 hp·h | 11 004 413 809 822 hp·h | 11 397 428 588 745 hp·h | 11 790 443 367 667 hp·h | 12 183 458 146 589 hp·h | 12 576 472 925 511 hp·h | 12 969 487 704 434 hp·h | 13 362 502 483 356 hp·h | 13 755 517 262 278 hp·h | 14 148 532 041 200 hp·h | 14 541 546 820 123 hp·h | 14 934 561 599 045 hp·h | 15 327 576 377 967 hp·h | 15 720 591 156 889 hp·h | 16 113 605 935 811 hp·h | 16 506 620 714 734 hp·h | 16 899 635 493 656 hp·h | 17 292 650 272 578 hp·h | 17 685 665 051 500 hp·h | 18 078 679 830 423 hp·h | 18 471 694 609 345 hp·h | 18 864 709 388 267 hp·h | 19 257 724 167 189 hp·h | 19 650 738 946 111 hp·h | 20 043 753 725 034 hp·h | 20 436 768 503 956 hp·h | 20 829 783 282 878 hp·h | 21 222 798 061 800 hp·h | 21 615 812 840 723 hp·h | 22 008 827 619 645 hp·h | 22 401 842 398 567 hp·h | 22 794 857 177 489 hp·h | 23 187 871 956 412 hp·h | 23 580 886 735 334 hp·h | 23 973 901 514 256 hp·h | 24 366 916 293 178 hp·h | 24 759 931 072 100 hp·h | 25 152 945 851 023 hp·h | 25 545 960 629 945 hp·h | 25 938 975 408 867 hp·h | 26 331 990 187 789 hp·h | 26 725 004 966 712 hp·h | 27 118 019 745 634 hp·h | 27 511 034 524 556 hp·h | 27 904 049 303 478 hp·h | 28 297 064 082 401 hp·h | 28 690 078 861 323 hp·h | 29 083 093 640 245 hp·h | 29 476 108 419 167 hp·h | 29 869 123 198 089 hp·h | 30 262 137 977 012 hp·h | 30 655 152 755 934 hp·h | 31 048 167 534 856 hp·h | 31 441 182 313 778 hp·h | 31 834 197 092 701 hp·h | 32 227 211 871 623 hp·h | 32 620 226 650 545 hp·h | 33 013 241 429 467 hp·h | 33 406 256 208 390 hp·h | 33 799 270 987 312 hp·h | 34 192 285 766 234 hp·h | 34 585 300 545 156 hp·h | 34 978 315 324 078 hp·h | 35 371 330 103 001 hp·h | 35 764 344 881 923 hp·h | 36 157 359 660 845 hp·h | 36 550 374 439 767 hp·h | 36 943 389 218 690 hp·h | 37 336 403 997 612 hp·h | 37 729 418 776 534 hp·h | 38 122 433 555 456 hp·h | 38 515 448 334 379 hp·h | 38 908 463 113 301 hp·h | 39 301 477 892 223 hp·h |
A quad is a unit of energy equal to 1015 (a short-scale quadrillion) BTU, or 1.055 × 1018 joules (1.055 exajoules or EJ) in SI units.
| 1 quads = 393014778922.23 horsepower-hours | 6 quads = 2358088673533.4 horsepower-hours |
| 2 quads = 786029557844.46 horsepower-hours | 7 quads = 2751103452455.6 horsepower-hours |
| 3 quads = 1179044336766.7 horsepower-hours | 8 quads = 3144118231377.8 horsepower-hours |
| 4 quads = 1572059115688.9 horsepower-hours | 9 quads = 3537133010300.1 horsepower-hours |
| 5 quads = 1965073894611.1 horsepower-hours | 10 quads = 3930147789222.3 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 = 2.5444335776439E-12 quads | 6 horsepower-hours = 1.5266601465863E-11 quads |
| 2 horsepower-hours = 5.0888671552877E-12 quads | 7 horsepower-hours = 1.7811035043507E-11 quads |
| 3 horsepower-hours = 7.6333007329316E-12 quads | 8 horsepower-hours = 2.0355468621151E-11 quads |
| 4 horsepower-hours = 1.0177734310575E-11 quads | 9 horsepower-hours = 2.2899902198795E-11 quads |
| 5 horsepower-hours = 1.2722167888219E-11 quads | 10 horsepower-hours = 2.5444335776439E-11 quads |
| 1 quads = 393,014,778,922.23 horsepower-hours |
| 1 horsepower-hours = 2.5444335776439 × 10-12 quads |