英馬力をキロワットに換算するには？
英馬力の数に 0.7457 を掛けます。hp と書かれた出力はほぼ必ず英語圏の資料から来ています。仏馬力やキロワットで書かれた欧州や日本の諸元表と比べる前に、どちらの馬力かを確かめてください。
kW = hp × 0.7457hp = kW ÷ 0.7457
この二つの単位が使われる場所
キロワットは欧州連合における原動機出力の法定単位であり、馬力はその横に併記できるだけで、単独で示すことは認められていません。
エンジン出力の英馬力とキロワット
| 50 hp | 37.3 kW |
| 75 hp | 55.9 kW |
| 100 hp | 74.6 kW |
| 125 hp | 93.2 kW |
| 150 hp | 111.9 kW |
| 200 hp | 149.1 kW |
| 250 hp | 186.4 kW |
| 300 hp | 223.7 kW |
| 400 hp | 298.3 kW |
| 500 hp | 372.8 kW |
| 1,000 hp | 745.7 kW |
すべての値を表示
- 1 hp = 0.7457 kW
- 2 hp = 1.4914 kW
- 3 hp = 2.2371 kW
- 4 hp = 2.9828 kW
- 5 hp = 3.7285 kW
- 6 hp = 4.4742 kW
- 7 hp = 5.2199 kW
- 8 hp = 5.9656 kW
- 9 hp = 6.7113 kW
- 10 hp = 7.457 kW
- 11 hp = 8.2027 kW
- 12 hp = 8.9484 kW
- 13 hp = 9.6941 kW
- 14 hp = 10.4398 kW
- 15 hp = 11.1855 kW
- 16 hp = 11.9312 kW
- 17 hp = 12.6769 kW
- 18 hp = 13.4226 kW
- 19 hp = 14.1683 kW
- 20 hp = 14.914 kW
- 21 hp = 15.6597 kW
- 22 hp = 16.4054 kW
- 23 hp = 17.1511 kW
- 24 hp = 17.8968 kW
- 25 hp = 18.6425 kW
- 26 hp = 19.3882 kW
- 27 hp = 20.1339 kW
- 28 hp = 20.8796 kW
- 29 hp = 21.6253 kW
- 30 hp = 22.371 kW
- 31 hp = 23.1167 kW
- 32 hp = 23.8624 kW
- 33 hp = 24.6081 kW
- 34 hp = 25.3538 kW
- 35 hp = 26.0995 kW
- 36 hp = 26.8452 kW
- 37 hp = 27.5909 kW
- 38 hp = 28.3366 kW
- 39 hp = 29.0823 kW
- 40 hp = 29.828 kW
- 41 hp = 30.5737 kW
- 42 hp = 31.3194 kW
- 43 hp = 32.0651 kW
- 44 hp = 32.8108 kW
- 45 hp = 33.5565 kW
- 46 hp = 34.3022 kW
- 47 hp = 35.0479 kW
- 48 hp = 35.7936 kW
- 49 hp = 36.5393 kW
- 50 hp = 37.285 kW
- 51 hp = 38.0307 kW
- 52 hp = 38.7764 kW
- 53 hp = 39.5221 kW
- 54 hp = 40.2678 kW
- 55 hp = 41.0135 kW
- 56 hp = 41.7592 kW
- 57 hp = 42.5049 kW
- 58 hp = 43.2506 kW
- 59 hp = 43.9963 kW
- 60 hp = 44.742 kW
- 61 hp = 45.4877 kW
- 62 hp = 46.2334 kW
- 63 hp = 46.9791 kW
- 64 hp = 47.7248 kW
- 65 hp = 48.4705 kW
- 66 hp = 49.2162 kW
- 67 hp = 49.9619 kW
- 68 hp = 50.7076 kW
- 69 hp = 51.4533 kW
- 70 hp = 52.199 kW
- 71 hp = 52.9447 kW
- 72 hp = 53.6904 kW
- 73 hp = 54.4361 kW
- 74 hp = 55.1818 kW
- 75 hp = 55.9275 kW
- 76 hp = 56.6732 kW
- 77 hp = 57.4189 kW
- 78 hp = 58.1646 kW
- 79 hp = 58.9103 kW
- 80 hp = 59.656 kW
- 81 hp = 60.4017 kW
- 82 hp = 61.1474 kW
- 83 hp = 61.8931 kW
- 84 hp = 62.6388 kW
- 85 hp = 63.3845 kW
- 86 hp = 64.1302 kW
- 87 hp = 64.8759 kW
- 88 hp = 65.6216 kW
- 89 hp = 66.3673 kW
- 90 hp = 67.113 kW
- 91 hp = 67.8587 kW
- 92 hp = 68.6044 kW
- 93 hp = 69.3501 kW
- 94 hp = 70.0958 kW
- 95 hp = 70.8415 kW
- 96 hp = 71.5872 kW
- 97 hp = 72.3329 kW
- 98 hp = 73.0786 kW
- 99 hp = 73.8243 kW
- 100 hp = 74.57 kW
- 101 hp = 75.3157 kW
- 102 hp = 76.0614 kW
- 103 hp = 76.8071 kW
- 104 hp = 77.5528 kW
- 105 hp = 78.2985 kW
- 106 hp = 79.0442 kW
- 107 hp = 79.7899 kW
- 108 hp = 80.5356 kW
- 109 hp = 81.2813 kW
- 110 hp = 82.027 kW
- 111 hp = 82.7727 kW
- 112 hp = 83.5184 kW
- 113 hp = 84.2641 kW
- 114 hp = 85.0098 kW
- 115 hp = 85.7555 kW
- 116 hp = 86.5012 kW
- 117 hp = 87.2469 kW
- 118 hp = 87.9926 kW
- 119 hp = 88.7383 kW
- 120 hp = 89.484 kW
- 121 hp = 90.2297 kW
- 122 hp = 90.9754 kW
- 123 hp = 91.7211 kW
- 124 hp = 92.4668 kW
- 125 hp = 93.2125 kW
- 126 hp = 93.9582 kW
- 127 hp = 94.7039 kW
- 128 hp = 95.4496 kW
- 129 hp = 96.1953 kW
- 130 hp = 96.941 kW
- 131 hp = 97.6867 kW
- 132 hp = 98.4324 kW
- 133 hp = 99.1781 kW
- 134 hp = 99.9238 kW
- 135 hp = 100.6695 kW
- 136 hp = 101.4152 kW
- 137 hp = 102.1609 kW
- 138 hp = 102.9066 kW
- 139 hp = 103.6523 kW
- 140 hp = 104.398 kW
- 141 hp = 105.1437 kW
- 142 hp = 105.8894 kW
- 143 hp = 106.6351 kW
- 144 hp = 107.3808 kW
- 145 hp = 108.1265 kW
- 146 hp = 108.8722 kW
- 147 hp = 109.6179 kW
- 148 hp = 110.3636 kW
- 149 hp = 111.1093 kW
- 150 hp = 111.855 kW
- 151 hp = 112.6007 kW
- 152 hp = 113.3464 kW
- 153 hp = 114.0921 kW
- 154 hp = 114.8378 kW
- 155 hp = 115.5835 kW
- 156 hp = 116.3292 kW
- 157 hp = 117.0749 kW
- 158 hp = 117.8206 kW
- 159 hp = 118.5663 kW
- 160 hp = 119.312 kW
- 161 hp = 120.0577 kW
- 162 hp = 120.8034 kW
- 163 hp = 121.5491 kW
- 164 hp = 122.2948 kW
- 165 hp = 123.0405 kW
- 166 hp = 123.7862 kW
- 167 hp = 124.5319 kW
- 168 hp = 125.2776 kW
- 169 hp = 126.0233 kW
- 170 hp = 126.769 kW
- 171 hp = 127.5147 kW
- 172 hp = 128.2604 kW
- 173 hp = 129.0061 kW
- 174 hp = 129.7518 kW
- 175 hp = 130.4975 kW
- 176 hp = 131.2432 kW
- 177 hp = 131.9889 kW
- 178 hp = 132.7346 kW
- 179 hp = 133.4803 kW
- 180 hp = 134.226 kW
- 181 hp = 134.9717 kW
- 182 hp = 135.7174 kW
- 183 hp = 136.4631 kW
- 184 hp = 137.2088 kW
- 185 hp = 137.9545 kW
- 186 hp = 138.7002 kW
- 187 hp = 139.4459 kW
- 188 hp = 140.1916 kW
- 189 hp = 140.9373 kW
- 190 hp = 141.683 kW
- 191 hp = 142.4287 kW
- 192 hp = 143.1744 kW
- 193 hp = 143.9201 kW
- 194 hp = 144.6658 kW
- 195 hp = 145.4115 kW
- 196 hp = 146.1572 kW
- 197 hp = 146.9029 kW
- 198 hp = 147.6486 kW
- 199 hp = 148.3943 kW
- 200 hp = 149.14 kW
- 205 hp = 152.8685 kW
- 210 hp = 156.597 kW
- 215 hp = 160.3255 kW
- 220 hp = 164.054 kW
- 225 hp = 167.7825 kW
- 230 hp = 171.511 kW
- 235 hp = 175.2395 kW
- 240 hp = 178.968 kW
- 245 hp = 182.6965 kW
- 250 hp = 186.425 kW
- 255 hp = 190.1535 kW
- 260 hp = 193.882 kW
- 265 hp = 197.6105 kW
- 270 hp = 201.339 kW
- 275 hp = 205.0675 kW
- 280 hp = 208.796 kW
- 285 hp = 212.5245 kW
- 290 hp = 216.253 kW
- 295 hp = 219.9815 kW
- 300 hp = 223.71 kW
- 305 hp = 227.4385 kW
- 310 hp = 231.167 kW
- 315 hp = 234.8955 kW
- 320 hp = 238.624 kW
- 325 hp = 242.3525 kW
- 330 hp = 246.081 kW
- 335 hp = 249.8095 kW
- 340 hp = 253.538 kW
- 345 hp = 257.2665 kW
- 350 hp = 260.995 kW
- 355 hp = 264.7235 kW
- 360 hp = 268.452 kW
- 365 hp = 272.1805 kW
- 370 hp = 275.909 kW
- 375 hp = 279.6375 kW
- 380 hp = 283.366 kW
- 385 hp = 287.0945 kW
- 390 hp = 290.823 kW
- 395 hp = 294.5514 kW
- 400 hp = 298.2799 kW
- 405 hp = 302.0084 kW
- 410 hp = 305.7369 kW
- 415 hp = 309.4654 kW
- 420 hp = 313.1939 kW
- 425 hp = 316.9224 kW
- 430 hp = 320.6509 kW
- 435 hp = 324.3794 kW
- 440 hp = 328.1079 kW
- 445 hp = 331.8364 kW
- 450 hp = 335.5649 kW
- 455 hp = 339.2934 kW
- 460 hp = 343.0219 kW
- 465 hp = 346.7504 kW
- 470 hp = 350.4789 kW
- 475 hp = 354.2074 kW
- 480 hp = 357.9359 kW
- 485 hp = 361.6644 kW
- 490 hp = 365.3929 kW
- 495 hp = 369.1214 kW
- 500 hp = 372.8499 kW
- 510 hp = 380.3069 kW
- 520 hp = 387.7639 kW
- 530 hp = 395.2209 kW
- 540 hp = 402.6779 kW
- 550 hp = 410.1349 kW
- 560 hp = 417.5919 kW
- 570 hp = 425.0489 kW
- 580 hp = 432.5059 kW
- 590 hp = 439.9629 kW
- 600 hp = 447.4199 kW
- 610 hp = 454.8769 kW
- 620 hp = 462.3339 kW
- 630 hp = 469.7909 kW
- 640 hp = 477.2479 kW
- 650 hp = 484.7049 kW
- 660 hp = 492.1619 kW
- 670 hp = 499.6189 kW
- 680 hp = 507.0759 kW
- 690 hp = 514.5329 kW
- 700 hp = 521.9899 kW
- 710 hp = 529.4469 kW
- 720 hp = 536.9039 kW
- 730 hp = 544.3609 kW
- 740 hp = 551.8179 kW
- 750 hp = 559.2749 kW
- 760 hp = 566.7319 kW
- 770 hp = 574.1889 kW
- 780 hp = 581.6459 kW
- 790 hp = 589.1029 kW
- 800 hp = 596.5599 kW
- 810 hp = 604.0169 kW
- 820 hp = 611.4739 kW
- 830 hp = 618.9309 kW
- 840 hp = 626.3879 kW
- 850 hp = 633.8449 kW
- 860 hp = 641.3019 kW
- 870 hp = 648.7589 kW
- 880 hp = 656.2159 kW
- 890 hp = 663.6729 kW
- 900 hp = 671.1299 kW
- 910 hp = 678.5869 kW
- 920 hp = 686.0439 kW
- 930 hp = 693.5009 kW
- 940 hp = 700.9579 kW
- 950 hp = 708.4149 kW
- 960 hp = 715.8719 kW
- 970 hp = 723.3289 kW
- 980 hp = 730.7859 kW
- 990 hp = 738.2429 kW
- 1,000 hp = 745.6999 kW
- 1,025 hp = 764.3424 kW
- 1,050 hp = 782.9849 kW
- 1,075 hp = 801.6274 kW
- 1,100 hp = 820.2699 kW
- 1,125 hp = 838.9124 kW
- 1,150 hp = 857.5549 kW
- 1,175 hp = 876.1973 kW
- 1,200 hp = 894.8398 kW
- 1,225 hp = 913.4823 kW
- 1,250 hp = 932.1248 kW
- 1,275 hp = 950.7673 kW
- 1,300 hp = 969.4098 kW
- 1,325 hp = 988.0523 kW
- 1,350 hp = 1,006.6948 kW
- 1,375 hp = 1,025.3373 kW
- 1,400 hp = 1,043.9798 kW
- 1,425 hp = 1,062.6223 kW
- 1,450 hp = 1,081.2648 kW
- 1,475 hp = 1,099.9073 kW
- 1,500 hp = 1,118.5498 kW
- 1,525 hp = 1,137.1923 kW
- 1,550 hp = 1,155.8348 kW
- 1,575 hp = 1,174.4773 kW
- 1,600 hp = 1,193.1198 kW
- 1,625 hp = 1,211.7623 kW
- 1,650 hp = 1,230.4048 kW
- 1,675 hp = 1,249.0473 kW
- 1,700 hp = 1,267.6898 kW
- 1,725 hp = 1,286.3323 kW
- 1,750 hp = 1,304.9748 kW
- 1,775 hp = 1,323.6173 kW
- 1,800 hp = 1,342.2598 kW
- 1,825 hp = 1,360.9023 kW
- 1,850 hp = 1,379.5448 kW
- 1,875 hp = 1,398.1873 kW
- 1,900 hp = 1,416.8298 kW
- 1,925 hp = 1,435.4723 kW
- 1,950 hp = 1,454.1148 kW
- 1,975 hp = 1,472.7572 kW
- 2,000 hp = 1,491.3997 kW
- 2,050 hp = 1,528.6847 kW
- 2,100 hp = 1,565.9697 kW
- 2,150 hp = 1,603.2547 kW
- 2,200 hp = 1,640.5397 kW
- 2,250 hp = 1,677.8247 kW
- 2,300 hp = 1,715.1097 kW
- 2,350 hp = 1,752.3947 kW
- 2,400 hp = 1,789.6797 kW
- 2,450 hp = 1,826.9647 kW
- 2,500 hp = 1,864.2497 kW
- 2,550 hp = 1,901.5347 kW
- 2,600 hp = 1,938.8197 kW
- 2,650 hp = 1,976.1047 kW
- 2,700 hp = 2,013.3897 kW
- 2,750 hp = 2,050.6746 kW
- 2,800 hp = 2,087.9596 kW
- 2,850 hp = 2,125.2446 kW
- 2,900 hp = 2,162.5296 kW
- 2,950 hp = 2,199.8146 kW
- 3,000 hp = 2,237.0996 kW
- 3,050 hp = 2,274.3846 kW
- 3,100 hp = 2,311.6696 kW
- 3,150 hp = 2,348.9546 kW
- 3,200 hp = 2,386.2396 kW
- 3,250 hp = 2,423.5246 kW
- 3,300 hp = 2,460.8096 kW
- 3,350 hp = 2,498.0946 kW
- 3,400 hp = 2,535.3796 kW
- 3,450 hp = 2,572.6646 kW
- 3,500 hp = 2,609.9496 kW
- 3,550 hp = 2,647.2345 kW
- 3,600 hp = 2,684.5195 kW
- 3,650 hp = 2,721.8045 kW
- 3,700 hp = 2,759.0895 kW
- 3,750 hp = 2,796.3745 kW
- 3,800 hp = 2,833.6595 kW
- 3,850 hp = 2,870.9445 kW
- 3,900 hp = 2,908.2295 kW
- 3,950 hp = 2,945.5145 kW
- 4,000 hp = 2,982.7995 kW
- 4,050 hp = 3,020.0845 kW
- 4,100 hp = 3,057.3695 kW
- 4,150 hp = 3,094.6545 kW
- 4,200 hp = 3,131.9395 kW
- 4,250 hp = 3,169.2245 kW
- 4,300 hp = 3,206.5094 kW
- 4,350 hp = 3,243.7944 kW
- 4,400 hp = 3,281.0794 kW
- 4,450 hp = 3,318.3644 kW
- 4,500 hp = 3,355.6494 kW
- 4,550 hp = 3,392.9344 kW
- 4,600 hp = 3,430.2194 kW
- 4,650 hp = 3,467.5044 kW
- 4,700 hp = 3,504.7894 kW
- 4,750 hp = 3,542.0744 kW
- 4,800 hp = 3,579.3594 kW
- 4,850 hp = 3,616.6444 kW
- 4,900 hp = 3,653.9294 kW
- 4,950 hp = 3,691.2144 kW
- 5,000 hp = 3,728.4994 kW
- 5,100 hp = 3,803.0693 kW
- 5,200 hp = 3,877.6393 kW
- 5,300 hp = 3,952.2093 kW
- 5,400 hp = 4,026.7793 kW
- 5,500 hp = 4,101.3493 kW
- 5,600 hp = 4,175.9193 kW
- 5,700 hp = 4,250.4893 kW
- 5,800 hp = 4,325.0593 kW
- 5,900 hp = 4,399.6292 kW
- 6,000 hp = 4,474.1992 kW
- 6,100 hp = 4,548.7692 kW
- 6,200 hp = 4,623.3392 kW
- 6,300 hp = 4,697.9092 kW
- 6,400 hp = 4,772.4792 kW
- 6,500 hp = 4,847.0492 kW
- 6,600 hp = 4,921.6192 kW
- 6,700 hp = 4,996.1891 kW
- 6,800 hp = 5,070.7591 kW
- 6,900 hp = 5,145.3291 kW
- 7,000 hp = 5,219.8991 kW
- 7,100 hp = 5,294.4691 kW
- 7,200 hp = 5,369.0391 kW
- 7,300 hp = 5,443.6091 kW
- 7,400 hp = 5,518.1791 kW
- 7,500 hp = 5,592.749 kW
- 7,600 hp = 5,667.319 kW
- 7,700 hp = 5,741.889 kW
- 7,800 hp = 5,816.459 kW
- 7,900 hp = 5,891.029 kW
- 8,000 hp = 5,965.599 kW
- 8,100 hp = 6,040.169 kW
- 8,200 hp = 6,114.739 kW
- 8,300 hp = 6,189.3089 kW
- 8,400 hp = 6,263.8789 kW
- 8,500 hp = 6,338.4489 kW
- 8,600 hp = 6,413.0189 kW
- 8,700 hp = 6,487.5889 kW
- 8,800 hp = 6,562.1589 kW
- 8,900 hp = 6,636.7289 kW
- 9,000 hp = 6,711.2988 kW
- 9,100 hp = 6,785.8688 kW
- 9,200 hp = 6,860.4388 kW
- 9,300 hp = 6,935.0088 kW
- 9,400 hp = 7,009.5788 kW
- 9,500 hp = 7,084.1488 kW
- 9,600 hp = 7,158.7188 kW
- 9,700 hp = 7,233.2888 kW
- 9,800 hp = 7,307.8587 kW
- 9,900 hp = 7,382.4287 kW
- 10,000 hp = 7,456.9987 kW
英馬力は毎秒 550 フィートポンド重、すなわち 745.6998716 W と厳密に定められています。ヨーロッパ大陸と日本で用いられる 735.49875 W の仏馬力とも、米国で電動機に用いられる 746 W の電気馬力とも別の単位です。 算出方法と出典.
よくある質問
hp と PS は同じですか？
違います。差は 1.4 % です。英馬力は 745.7 W、仏馬力は 735.5 W です。300 hp と表示された米国車は、日本やヨーロッパの数え方では 304 PS にあたります。差は目立ちませんが積み上がり、500 hp では 7 馬力に達します。
ヨーロッパの車検証がキロワット表記なのはなぜですか？
キロワットが法定単位であり、二つの定義が流通する馬力と違って曖昧さがないからです。同じ書類に並ぶ課税出力は仕事率の単位ではなく、国ごとに算式の異なる課税区分にすぎません。
745.7 という数字はどこから来たのですか？
18 世紀のジェームズ・ワットが、蒸気機関を顧客の分かる単位で売るために、荷役馬の仕事率を毎秒 550 フィートポンドと定めたことに由来します。この値は意図的に大きめで、実際の馬が一日の労働で維持できるのは 0.5 hp 程度です。
150 hp の車は何キロワットですか？
111.9 kW です。目安として、軽量な市街地向けの車はおよそ 60 から 80 kW、家族向けのコンパクトカーは 90 から 130 kW、スポーツカーは 200 kW を超えます。電動アシスト自転車のモーターはヨーロッパでは 0.25 kW が上限で、英馬力の三分の一にあたります。
bhp と whp は何が違うのですか？
測定する場所が違います。bhp すなわち brake horsepower はクランクシャフトで測る値で、エンジン単体を台上に載せて計ります。whp すなわち wheel horsepower は駆動系を含めた車輪での値で、マニュアルか四輪駆動のオートマかによって 10 から 20 % ほど低く出ます。300 bhp とされるエンジンがシャシーダイナモで 250 whp を示すのはよくあることで、故障ではなく、同じ馬力ではないというだけです。