| 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 |
| knot | 643.8012959 kn | 1,287.6025918 kn | 1,931.4038877 kn | 2,575.2051836 kn | 3,219.0064795 kn | 3,862.8077754 kn | 4,506.6090713 kn | 5,150.4103672 kn | 5,794.2116631 kn | 6,438.0129590 kn | 7,081.8142549 kn | 7,725.6155508 kn | 8,369.4168467 kn | 9,013.2181425 kn | 9,657.0194384 kn | 10,300.8207343 kn | 10,944.6220302 kn | 11,588.4233261 kn | 12,232.2246220 kn | 12,876.0259179 kn | 13,519.8272138 kn | 14,163.6285097 kn | 14,807.4298056 kn | 15,451.2311015 kn | 16,095.0323974 kn | 16,738.8336933 kn | 17,382.6349892 kn | 18,026.4362851 kn | 18,670.2375810 kn | 19,314.0388769 kn | 19,957.8401728 kn | 20,601.6414687 kn | 21,245.4427646 kn | 21,889.2440605 kn | 22,533.0453564 kn | 23,176.8466523 kn | 23,820.6479482 kn | 24,464.4492441 kn | 25,108.2505400 kn | 25,752.0518359 kn | 26,395.8531317 kn | 27,039.6544276 kn | 27,683.4557235 kn | 28,327.2570194 kn | 28,971.0583153 kn | 29,614.8596112 kn | 30,258.6609071 kn | 30,902.4622030 kn | 31,546.2634989 kn | 32,190.0647948 kn | 32,833.8660907 kn | 33,477.6673866 kn | 34,121.4686825 kn | 34,765.2699784 kn | 35,409.0712743 kn | 36,052.8725702 kn | 36,696.6738661 kn | 37,340.4751620 kn | 37,984.2764579 kn | 38,628.0777538 kn | 39,271.8790497 kn | 39,915.6803456 kn | 40,559.4816415 kn | 41,203.2829374 kn | 41,847.0842333 kn | 42,490.8855292 kn | 43,134.6868251 kn | 43,778.4881210 kn | 44,422.2894168 kn | 45,066.0907127 kn | 45,709.8920086 kn | 46,353.6933045 kn | 46,997.4946004 kn | 47,641.2958963 kn | 48,285.0971922 kn | 48,928.8984881 kn | 49,572.6997840 kn | 50,216.5010799 kn | 50,860.3023758 kn | 51,504.1036717 kn | 52,147.9049676 kn | 52,791.7062635 kn | 53,435.5075594 kn | 54,079.3088553 kn | 54,723.1101512 kn | 55,366.9114471 kn | 56,010.7127430 kn | 56,654.5140389 kn | 57,298.3153348 kn | 57,942.1166307 kn | 58,585.9179266 kn | 59,229.7192225 kn | 59,873.5205184 kn | 60,517.3218143 kn | 61,161.1231102 kn | 61,804.9244060 kn | 62,448.7257019 kn | 63,092.5269978 kn | 63,736.3282937 kn | 64,380.1295896 kn |
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) ≈ 643.80129589633 knots | 6 speed of sounds (32 °F) ≈ 3862.807775378 knots |
| 2 speed of sounds (32 °F) ≈ 1287.6025917927 knots | 7 speed of sounds (32 °F) ≈ 4506.6090712743 knots |
| 3 speed of sounds (32 °F) ≈ 1931.403887689 knots | 8 speed of sounds (32 °F) ≈ 5150.4103671706 knots |
| 4 speed of sounds (32 °F) ≈ 2575.2051835853 knots | 9 speed of sounds (32 °F) ≈ 5794.211663067 knots |
| 5 speed of sounds (32 °F) ≈ 3219.0064794816 knots | 10 speed of sounds (32 °F) ≈ 6438.0129589633 knots |
The knot (/nɒt/) is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.15078 mph. The ISO Standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE); kt is also common.
| 1 knots ≈ 0.0015532742887815 speed of sounds (32 °F) | 6 knots ≈ 0.0093196457326892 speed of sounds (32 °F) |
| 2 knots ≈ 0.0031065485775631 speed of sounds (32 °F) | 7 knots ≈ 0.010872920021471 speed of sounds (32 °F) |
| 3 knots ≈ 0.0046598228663446 speed of sounds (32 °F) | 8 knots ≈ 0.012426194310252 speed of sounds (32 °F) |
| 4 knots ≈ 0.0062130971551261 speed of sounds (32 °F) | 9 knots ≈ 0.013979468599034 speed of sounds (32 °F) |
| 5 knots ≈ 0.0077663714439077 speed of sounds (32 °F) | 10 knots ≈ 0.015532742887815 speed of sounds (32 °F) |
| 1 speed of sounds (32 °F) ≈ 643.8012959 knots |
| 1 knots ≈ 0.0015533 speed of sounds (32 °F) |