| 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 (32 °F) | 0.0013498 s | 0.0026995 s | 0.0040493 s | 0.0053990 s | 0.0067488 s | 0.0080986 s | 0.0094483 s | 0.0107981 s | 0.0121478 s | 0.0134976 s | 0.0148473 s | 0.0161971 s | 0.0175469 s | 0.0188966 s | 0.0202464 s | 0.0215961 s | 0.0229459 s | 0.0242957 s | 0.0256454 s | 0.0269952 s | 0.0283449 s | 0.0296947 s | 0.0310444 s | 0.0323942 s | 0.0337440 s | 0.0350937 s | 0.0364435 s | 0.0377932 s | 0.0391430 s | 0.0404928 s | 0.0418425 s | 0.0431923 s | 0.0445420 s | 0.0458918 s | 0.0472415 s | 0.0485913 s | 0.0499411 s | 0.0512908 s | 0.0526406 s | 0.0539903 s | 0.0553401 s | 0.0566899 s | 0.0580396 s | 0.0593894 s | 0.0607391 s | 0.0620889 s | 0.0634386 s | 0.0647884 s | 0.0661382 s | 0.0674879 s | 0.0688377 s | 0.0701874 s | 0.0715372 s | 0.0728870 s | 0.0742367 s | 0.0755865 s | 0.0769362 s | 0.0782860 s | 0.0796357 s | 0.0809855 s | 0.0823353 s | 0.0836850 s | 0.0850348 s | 0.0863845 s | 0.0877343 s | 0.0890841 s | 0.0904338 s | 0.0917836 s | 0.0931333 s | 0.0944831 s | 0.0958329 s | 0.0971826 s | 0.0985324 s | 0.0998821 s | 0.1012319 s | 0.1025816 s | 0.1039314 s | 0.1052812 s | 0.1066309 s | 0.1079807 s | 0.1093304 s | 0.1106802 s | 0.1120300 s | 0.1133797 s | 0.1147295 s | 0.1160792 s | 0.1174290 s | 0.1187787 s | 0.1201285 s | 0.1214783 s | 0.1228280 s | 0.1241778 s | 0.1255275 s | 0.1268773 s | 0.1282271 s | 0.1295768 s | 0.1309266 s | 0.1322763 s | 0.1336261 s | 0.1349758 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 ≈ 0.0013497584541063 speed of sounds (32 °F) | 6 miles per hour ≈ 0.0080985507246377 speed of sounds (32 °F) |
| 2 miles per hour ≈ 0.0026995169082126 speed of sounds (32 °F) | 7 miles per hour ≈ 0.009448309178744 speed of sounds (32 °F) |
| 3 miles per hour ≈ 0.0040492753623188 speed of sounds (32 °F) | 8 miles per hour ≈ 0.01079806763285 speed of sounds (32 °F) |
| 4 miles per hour ≈ 0.0053990338164251 speed of sounds (32 °F) | 9 miles per hour ≈ 0.012147826086957 speed of sounds (32 °F) |
| 5 miles per hour ≈ 0.0067487922705314 speed of sounds (32 °F) | 10 miles per hour ≈ 0.013497584541063 speed of sounds (32 °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 (32 °F) ≈ 740.87329992842 miles per hour | 6 speed of sounds (32 °F) ≈ 4445.2397995705 miles per hour |
| 2 speed of sounds (32 °F) ≈ 1481.7465998568 miles per hour | 7 speed of sounds (32 °F) ≈ 5186.1130994989 miles per hour |
| 3 speed of sounds (32 °F) ≈ 2222.6198997853 miles per hour | 8 speed of sounds (32 °F) ≈ 5926.9863994273 miles per hour |
| 4 speed of sounds (32 °F) ≈ 2963.4931997137 miles per hour | 9 speed of sounds (32 °F) ≈ 6667.8596993558 miles per hour |
| 5 speed of sounds (32 °F) ≈ 3704.3664996421 miles per hour | 10 speed of sounds (32 °F) ≈ 7408.7329992842 miles per hour |
| 1 miles per hour ≈ 0.0013498 speed of sounds (32 °F) |
| 1 speed of sounds (32 °F) ≈ 740.8732999 miles per hour |