| mile per hour | 1 mph | 2 mph | 3 mph | 4 mph | 5 mph | 6 mph | 7 mph | 8 mph | 9 mph | 10 mph | 11 mph | 12 mph | 13 mph | 14 mph | 15 mph | 16 mph | 17 mph | 18 mph | 19 mph | 20 mph | 21 mph | 22 mph | 23 mph | 24 mph | 25 mph | 26 mph | 27 mph | 28 mph | 29 mph | 30 mph | 31 mph | 32 mph | 33 mph | 34 mph | 35 mph | 36 mph | 37 mph | 38 mph | 39 mph | 40 mph | 41 mph | 42 mph | 43 mph | 44 mph | 45 mph | 46 mph | 47 mph | 48 mph | 49 mph | 50 mph | 51 mph | 52 mph | 53 mph | 54 mph | 55 mph | 56 mph | 57 mph | 58 mph | 59 mph | 60 mph | 61 mph | 62 mph | 63 mph | 64 mph | 65 mph | 66 mph | 67 mph | 68 mph | 69 mph | 70 mph | 71 mph | 72 mph | 73 mph | 74 mph | 75 mph | 76 mph | 77 mph | 78 mph | 79 mph | 80 mph | 81 mph | 82 mph | 83 mph | 84 mph | 85 mph | 86 mph | 87 mph | 88 mph | 89 mph | 90 mph | 91 mph | 92 mph | 93 mph | 94 mph | 95 mph | 96 mph | 97 mph | 98 mph | 99 mph | 100 mph |
| speed of sound (68 °F) | 0.0013033 s | 0.0026066 s | 0.0039100 s | 0.0052133 s | 0.0065166 s | 0.0078199 s | 0.0091233 s | 0.0104266 s | 0.0117299 s | 0.0130332 s | 0.0143366 s | 0.0156399 s | 0.0169432 s | 0.0182465 s | 0.0195499 s | 0.0208532 s | 0.0221565 s | 0.0234598 s | 0.0247631 s | 0.0260665 s | 0.0273698 s | 0.0286731 s | 0.0299764 s | 0.0312798 s | 0.0325831 s | 0.0338864 s | 0.0351897 s | 0.0364931 s | 0.0377964 s | 0.0390997 s | 0.0404030 s | 0.0417064 s | 0.0430097 s | 0.0443130 s | 0.0456163 s | 0.0469197 s | 0.0482230 s | 0.0495263 s | 0.0508296 s | 0.0521329 s | 0.0534363 s | 0.0547396 s | 0.0560429 s | 0.0573462 s | 0.0586496 s | 0.0599529 s | 0.0612562 s | 0.0625595 s | 0.0638629 s | 0.0651662 s | 0.0664695 s | 0.0677728 s | 0.0690762 s | 0.0703795 s | 0.0716828 s | 0.0729861 s | 0.0742894 s | 0.0755928 s | 0.0768961 s | 0.0781994 s | 0.0795027 s | 0.0808061 s | 0.0821094 s | 0.0834127 s | 0.0847160 s | 0.0860194 s | 0.0873227 s | 0.0886260 s | 0.0899293 s | 0.0912327 s | 0.0925360 s | 0.0938393 s | 0.0951426 s | 0.0964459 s | 0.0977493 s | 0.0990526 s | 0.1003559 s | 0.1016592 s | 0.1029626 s | 0.1042659 s | 0.1055692 s | 0.1068725 s | 0.1081759 s | 0.1094792 s | 0.1107825 s | 0.1120858 s | 0.1133892 s | 0.1146925 s | 0.1159958 s | 0.1172991 s | 0.1186024 s | 0.1199058 s | 0.1212091 s | 0.1225124 s | 0.1238157 s | 0.1251191 s | 0.1264224 s | 0.1277257 s | 0.1290290 s | 0.1303324 s |
Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. Although kilometres per hour is now the most widely used measure of speed, miles per hour remains the standard unit for speed limits in the United States, the United Kingdom, Antigua & Barbuda and Puerto Rico, although the latter two use kilometres for long distances.
| 1 miles per hour ≈ 0.0013033236151603 speed of sounds (68 °F) | 6 miles per hour ≈ 0.0078199416909621 speed of sounds (68 °F) |
| 2 miles per hour ≈ 0.0026066472303207 speed of sounds (68 °F) | 7 miles per hour ≈ 0.0091232653061224 speed of sounds (68 °F) |
| 3 miles per hour ≈ 0.0039099708454811 speed of sounds (68 °F) | 8 miles per hour ≈ 0.010426588921283 speed of sounds (68 °F) |
| 4 miles per hour ≈ 0.0052132944606414 speed of sounds (68 °F) | 9 miles per hour ≈ 0.011729912536443 speed of sounds (68 °F) |
| 5 miles per hour ≈ 0.0065166180758017 speed of sounds (68 °F) | 10 miles per hour ≈ 0.013033236151603 speed of sounds (68 °F) |
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 0 °C (32 °F), the speed of sound is 331.2 metres per second (1,087 ft/s; 1,192 km/h; 741 mph; 644 kn). At 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s.
| 1 speed of sounds (68 °F) ≈ 767.26914817466 miles per hour | 6 speed of sounds (68 °F) ≈ 4603.614889048 miles per hour |
| 2 speed of sounds (68 °F) ≈ 1534.5382963493 miles per hour | 7 speed of sounds (68 °F) ≈ 5370.8840372226 miles per hour |
| 3 speed of sounds (68 °F) ≈ 2301.807444524 miles per hour | 8 speed of sounds (68 °F) ≈ 6138.1531853973 miles per hour |
| 4 speed of sounds (68 °F) ≈ 3069.0765926986 miles per hour | 9 speed of sounds (68 °F) ≈ 6905.4223335719 miles per hour |
| 5 speed of sounds (68 °F) ≈ 3836.3457408733 miles per hour | 10 speed of sounds (68 °F) ≈ 7672.6914817466 miles per hour |
| 1 miles per hour ≈ 0.0013033 speed of sounds (68 °F) |
| 1 speed of sounds (68 °F) ≈ 767.2691482 miles per hour |