| 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 |
| 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 |
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) ≈ 1 speed of sounds (32 °F) | 6 speed of sounds (32 °F) ≈ 6 speed of sounds (32 °F) |
| 2 speed of sounds (32 °F) ≈ 2 speed of sounds (32 °F) | 7 speed of sounds (32 °F) ≈ 7 speed of sounds (32 °F) |
| 3 speed of sounds (32 °F) ≈ 3 speed of sounds (32 °F) | 8 speed of sounds (32 °F) ≈ 8 speed of sounds (32 °F) |
| 4 speed of sounds (32 °F) ≈ 4 speed of sounds (32 °F) | 9 speed of sounds (32 °F) ≈ 9 speed of sounds (32 °F) |
| 5 speed of sounds (32 °F) ≈ 5 speed of sounds (32 °F) | 10 speed of sounds (32 °F) ≈ 10 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) ≈ 1 speed of sounds (32 °F) | 6 speed of sounds (32 °F) ≈ 6 speed of sounds (32 °F) |
| 2 speed of sounds (32 °F) ≈ 2 speed of sounds (32 °F) | 7 speed of sounds (32 °F) ≈ 7 speed of sounds (32 °F) |
| 3 speed of sounds (32 °F) ≈ 3 speed of sounds (32 °F) | 8 speed of sounds (32 °F) ≈ 8 speed of sounds (32 °F) |
| 4 speed of sounds (32 °F) ≈ 4 speed of sounds (32 °F) | 9 speed of sounds (32 °F) ≈ 9 speed of sounds (32 °F) |
| 5 speed of sounds (32 °F) ≈ 5 speed of sounds (32 °F) | 10 speed of sounds (32 °F) ≈ 10 speed of sounds (32 °F) |
| 1 speed of sounds (32 °F) ≈ 1 speed of sounds (32 °F) |
| 1 speed of sounds (32 °F) ≈ 1 speed of sounds (32 °F) |