| speed of sound (32 °F) | 1 s | 2 s | 3 s | 4 s | 5 s | 6 s | 7 s | 8 s | 9 s | 10 s | 11 s | 12 s | 13 s | 14 s | 15 s | 16 s | 17 s | 18 s | 19 s | 20 s | 21 s | 22 s | 23 s | 24 s | 25 s | 26 s | 27 s | 28 s | 29 s | 30 s | 31 s | 32 s | 33 s | 34 s | 35 s | 36 s | 37 s | 38 s | 39 s | 40 s | 41 s | 42 s | 43 s | 44 s | 45 s | 46 s | 47 s | 48 s | 49 s | 50 s | 51 s | 52 s | 53 s | 54 s | 55 s | 56 s | 57 s | 58 s | 59 s | 60 s | 61 s | 62 s | 63 s | 64 s | 65 s | 66 s | 67 s | 68 s | 69 s | 70 s | 71 s | 72 s | 73 s | 74 s | 75 s | 76 s | 77 s | 78 s | 79 s | 80 s | 81 s | 82 s | 83 s | 84 s | 85 s | 86 s | 87 s | 88 s | 89 s | 90 s | 91 s | 92 s | 93 s | 94 s | 95 s | 96 s | 97 s | 98 s | 99 s | 100 s |
| yard per hour | 1,303,937.007874 ydph | 2,607,874.015748 ydph | 3,911,811.023622 ydph | 5,215,748.0314961 ydph | 6,519,685.0393701 ydph | 7,823,622.0472441 ydph | 9,127,559.0551181 ydph | 10,431,496.062992 ydph | 11,735,433.070866 ydph | 13,039,370.07874 ydph | 14,343,307.086614 ydph | 15,647,244.094488 ydph | 16,951,181.102362 ydph | 18,255,118.110236 ydph | 19,559,055.11811 ydph | 20,862,992.125984 ydph | 22,166,929.133858 ydph | 23,470,866.141732 ydph | 24,774,803.149606 ydph | 26,078,740.15748 ydph | 27,382,677.165354 ydph | 28,686,614.173228 ydph | 29,990,551.181102 ydph | 31,294,488.188976 ydph | 32,598,425.19685 ydph | 33,902,362.204724 ydph | 35,206,299.212598 ydph | 36,510,236.220472 ydph | 37,814,173.228346 ydph | 39,118,110.23622 ydph | 40,422,047.244094 ydph | 41,725,984.251969 ydph | 43,029,921.259843 ydph | 44,333,858.267717 ydph | 45,637,795.275591 ydph | 46,941,732.283465 ydph | 48,245,669.291339 ydph | 49,549,606.299213 ydph | 50,853,543.307087 ydph | 52,157,480.314961 ydph | 53,461,417.322835 ydph | 54,765,354.330709 ydph | 56,069,291.338583 ydph | 57,373,228.346457 ydph | 58,677,165.354331 ydph | 59,981,102.362205 ydph | 61,285,039.370079 ydph | 62,588,976.377953 ydph | 63,892,913.385827 ydph | 65,196,850.393701 ydph | 66,500,787.401575 ydph | 67,804,724.409449 ydph | 69,108,661.417323 ydph | 70,412,598.425197 ydph | 71,716,535.433071 ydph | 73,020,472.440945 ydph | 74,324,409.448819 ydph | 75,628,346.456693 ydph | 76,932,283.464567 ydph | 78,236,220.472441 ydph | 79,540,157.480315 ydph | 80,844,094.488189 ydph | 82,148,031.496063 ydph | 83,451,968.503937 ydph | 84,755,905.511811 ydph | 86,059,842.519685 ydph | 87,363,779.527559 ydph | 88,667,716.535433 ydph | 89,971,653.543307 ydph | 91,275,590.551181 ydph | 92,579,527.559055 ydph | 93,883,464.566929 ydph | 95,187,401.574803 ydph | 96,491,338.582677 ydph | 97,795,275.590551 ydph | 99,099,212.598425 ydph | 100,403,149.6063 ydph | 101,707,086.61417 ydph | 103,011,023.62205 ydph | 104,314,960.62992 ydph | 105,618,897.6378 ydph | 106,922,834.64567 ydph | 108,226,771.65354 ydph | 109,530,708.66142 ydph | 110,834,645.66929 ydph | 112,138,582.67717 ydph | 113,442,519.68504 ydph | 114,746,456.69291 ydph | 116,050,393.70079 ydph | 117,354,330.70866 ydph | 118,658,267.71654 ydph | 119,962,204.72441 ydph | 121,266,141.73228 ydph | 122,570,078.74016 ydph | 123,874,015.74803 ydph | 125,177,952.75591 ydph | 126,481,889.76378 ydph | 127,785,826.77165 ydph | 129,089,763.77953 ydph | 130,393,700.7874 ydph |
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) ≈ 1303937.007874 yards per hour | 6 speed of sounds (32 °F) ≈ 7823622.0472441 yards per hour |
| 2 speed of sounds (32 °F) ≈ 2607874.015748 yards per hour | 7 speed of sounds (32 °F) ≈ 9127559.0551181 yards per hour |
| 3 speed of sounds (32 °F) ≈ 3911811.023622 yards per hour | 8 speed of sounds (32 °F) ≈ 10431496.062992 yards per hour |
| 4 speed of sounds (32 °F) ≈ 5215748.0314961 yards per hour | 9 speed of sounds (32 °F) ≈ 11735433.070866 yards per hour |
| 5 speed of sounds (32 °F) ≈ 6519685.0393701 yards per hour | 10 speed of sounds (32 °F) ≈ 13039370.07874 yards per hour |
Yards per hour (abbreviated mph, YDPH or yd/h) is an imperial and United States customary unit of speed expressing the number of statute yards covered in one hour.
| 1 yards per hour ≈ 7.6690821256039E-7 speed of sounds (32 °F) | 6 yards per hour ≈ 4.6014492753623E-6 speed of sounds (32 °F) |
| 2 yards per hour ≈ 1.5338164251208E-6 speed of sounds (32 °F) | 7 yards per hour ≈ 5.3683574879227E-6 speed of sounds (32 °F) |
| 3 yards per hour ≈ 2.3007246376812E-6 speed of sounds (32 °F) | 8 yards per hour ≈ 6.1352657004831E-6 speed of sounds (32 °F) |
| 4 yards per hour ≈ 3.0676328502415E-6 speed of sounds (32 °F) | 9 yards per hour ≈ 6.9021739130435E-6 speed of sounds (32 °F) |
| 5 yards per hour ≈ 3.8345410628019E-6 speed of sounds (32 °F) | 10 yards per hour ≈ 7.6690821256039E-6 speed of sounds (32 °F) |
| 1 speed of sounds (32 °F) ≈ 1,303,937.007874 yards per hour |
| 1 yards per hour ≈ 7.6690821256039 × 10-7 speed of sounds (32 °F) |