| speed of sound (68 °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 | 666.7386609 kn | 1,333.4773218 kn | 2,000.2159827 kn | 2,666.9546436 kn | 3,333.6933045 kn | 4,000.4319654 kn | 4,667.1706263 kn | 5,333.9092873 kn | 6,000.6479482 kn | 6,667.3866091 kn | 7,334.1252700 kn | 8,000.8639309 kn | 8,667.6025918 kn | 9,334.3412527 kn | 10,001.0799136 kn | 10,667.8185745 kn | 11,334.5572354 kn | 12,001.2958963 kn | 12,668.0345572 kn | 13,334.7732181 kn | 14,001.5118791 kn | 14,668.2505400 kn | 15,334.9892009 kn | 16,001.7278618 kn | 16,668.4665227 kn | 17,335.2051836 kn | 18,001.9438445 kn | 18,668.6825054 kn | 19,335.4211663 kn | 20,002.1598272 kn | 20,668.8984881 kn | 21,335.6371490 kn | 22,002.3758099 kn | 22,669.1144708 kn | 23,335.8531317 kn | 24,002.5917927 kn | 24,669.3304536 kn | 25,336.0691145 kn | 26,002.8077754 kn | 26,669.5464363 kn | 27,336.2850972 kn | 28,003.0237581 kn | 28,669.7624190 kn | 29,336.5010799 kn | 30,003.2397408 kn | 30,669.9784017 kn | 31,336.7170626 kn | 32,003.4557235 kn | 32,670.1943844 kn | 33,336.9330454 kn | 34,003.6717063 kn | 34,670.4103672 kn | 35,337.1490281 kn | 36,003.8876890 kn | 36,670.6263499 kn | 37,337.3650108 kn | 38,004.1036717 kn | 38,670.8423326 kn | 39,337.5809935 kn | 40,004.3196544 kn | 40,671.0583153 kn | 41,337.7969762 kn | 42,004.5356371 kn | 42,671.2742981 kn | 43,338.0129590 kn | 44,004.7516199 kn | 44,671.4902808 kn | 45,338.2289417 kn | 46,004.9676026 kn | 46,671.7062635 kn | 47,338.4449244 kn | 48,005.1835853 kn | 48,671.9222462 kn | 49,338.6609071 kn | 50,005.3995680 kn | 50,672.1382289 kn | 51,338.8768898 kn | 52,005.6155508 kn | 52,672.3542117 kn | 53,339.0928726 kn | 54,005.8315335 kn | 54,672.5701944 kn | 55,339.3088553 kn | 56,006.0475162 kn | 56,672.7861771 kn | 57,339.5248380 kn | 58,006.2634989 kn | 58,673.0021598 kn | 59,339.7408207 kn | 60,006.4794816 kn | 60,673.2181425 kn | 61,339.9568035 kn | 62,006.6954644 kn | 62,673.4341253 kn | 63,340.1727862 kn | 64,006.9114471 kn | 64,673.6501080 kn | 65,340.3887689 kn | 66,007.1274298 kn | 66,673.8660907 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 (68 °F) ≈ 666.73866090713 knots | 6 speed of sounds (68 °F) ≈ 4000.4319654428 knots |
| 2 speed of sounds (68 °F) ≈ 1333.4773218143 knots | 7 speed of sounds (68 °F) ≈ 4667.1706263499 knots |
| 3 speed of sounds (68 °F) ≈ 2000.2159827214 knots | 8 speed of sounds (68 °F) ≈ 5333.909287257 knots |
| 4 speed of sounds (68 °F) ≈ 2666.9546436285 knots | 9 speed of sounds (68 °F) ≈ 6000.6479481641 knots |
| 5 speed of sounds (68 °F) ≈ 3333.6933045356 knots | 10 speed of sounds (68 °F) ≈ 6667.3866090713 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 ≈ 0.0014998380304503 speed of sounds (68 °F) | 6 knots ≈ 0.0089990281827017 speed of sounds (68 °F) |
| 2 knots ≈ 0.0029996760609006 speed of sounds (68 °F) | 7 knots ≈ 0.010498866213152 speed of sounds (68 °F) |
| 3 knots ≈ 0.0044995140913508 speed of sounds (68 °F) | 8 knots ≈ 0.011998704243602 speed of sounds (68 °F) |
| 4 knots ≈ 0.0059993521218011 speed of sounds (68 °F) | 9 knots ≈ 0.013498542274052 speed of sounds (68 °F) |
| 5 knots ≈ 0.0074991901522514 speed of sounds (68 °F) | 10 knots ≈ 0.014998380304503 speed of sounds (68 °F) |
| 1 speed of sounds (68 °F) ≈ 666.7386609 knots |
| 1 knots ≈ 0.0014998 speed of sounds (68 °F) |