knot | 1 kn | 2 kn | 3 kn | 4 kn | 5 kn | 6 kn | 7 kn | 8 kn | 9 kn | 10 kn | 11 kn | 12 kn | 13 kn | 14 kn | 15 kn | 16 kn | 17 kn | 18 kn | 19 kn | 20 kn | 21 kn | 22 kn | 23 kn | 24 kn | 25 kn | 26 kn | 27 kn | 28 kn | 29 kn | 30 kn | 31 kn | 32 kn | 33 kn | 34 kn | 35 kn | 36 kn | 37 kn | 38 kn | 39 kn | 40 kn | 41 kn | 42 kn | 43 kn | 44 kn | 45 kn | 46 kn | 47 kn | 48 kn | 49 kn | 50 kn | 51 kn | 52 kn | 53 kn | 54 kn | 55 kn | 56 kn | 57 kn | 58 kn | 59 kn | 60 kn | 61 kn | 62 kn | 63 kn | 64 kn | 65 kn | 66 kn | 67 kn | 68 kn | 69 kn | 70 kn | 71 kn | 72 kn | 73 kn | 74 kn | 75 kn | 76 kn | 77 kn | 78 kn | 79 kn | 80 kn | 81 kn | 82 kn | 83 kn | 84 kn | 85 kn | 86 kn | 87 kn | 88 kn | 89 kn | 90 kn | 91 kn | 92 kn | 93 kn | 94 kn | 95 kn | 96 kn | 97 kn | 98 kn | 99 kn | 100 kn |
speed of sound (68 °F) | 0.0014998 s | 0.0029997 s | 0.0044995 s | 0.0059994 s | 0.0074992 s | 0.0089990 s | 0.0104989 s | 0.0119987 s | 0.0134985 s | 0.0149984 s | 0.0164982 s | 0.0179981 s | 0.0194979 s | 0.0209977 s | 0.0224976 s | 0.0239974 s | 0.0254972 s | 0.0269971 s | 0.0284969 s | 0.0299968 s | 0.0314966 s | 0.0329964 s | 0.0344963 s | 0.0359961 s | 0.0374960 s | 0.0389958 s | 0.0404956 s | 0.0419955 s | 0.0434953 s | 0.0449951 s | 0.0464950 s | 0.0479948 s | 0.0494947 s | 0.0509945 s | 0.0524943 s | 0.0539942 s | 0.0554940 s | 0.0569938 s | 0.0584937 s | 0.0599935 s | 0.0614934 s | 0.0629932 s | 0.0644930 s | 0.0659929 s | 0.0674927 s | 0.0689925 s | 0.0704924 s | 0.0719922 s | 0.0734921 s | 0.0749919 s | 0.0764917 s | 0.0779916 s | 0.0794914 s | 0.0809913 s | 0.0824911 s | 0.0839909 s | 0.0854908 s | 0.0869906 s | 0.0884904 s | 0.0899903 s | 0.0914901 s | 0.0929900 s | 0.0944898 s | 0.0959896 s | 0.0974895 s | 0.0989893 s | 0.1004891 s | 0.1019890 s | 0.1034888 s | 0.1049887 s | 0.1064885 s | 0.1079883 s | 0.1094882 s | 0.1109880 s | 0.1124879 s | 0.1139877 s | 0.1154875 s | 0.1169874 s | 0.1184872 s | 0.1199870 s | 0.1214869 s | 0.1229867 s | 0.1244866 s | 0.1259864 s | 0.1274862 s | 0.1289861 s | 0.1304859 s | 0.1319857 s | 0.1334856 s | 0.1349854 s | 0.1364853 s | 0.1379851 s | 0.1394849 s | 0.1409848 s | 0.1424846 s | 0.1439845 s | 0.1454843 s | 0.1469841 s | 0.1484840 s | 0.1499838 s |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
knot | kn | ≡ 1 nmi/h = 1.852 km/h = 1852m/3600s | = 0.514444444 m/s | Other Speed |
knots | speed of sounds (68 °F) | knots | speed of sounds (68 °F) |
---|---|---|---|
1 | ≈ 0.0014998380304503 | 6 | ≈ 0.0089990281827017 |
2 | ≈ 0.0029996760609006 | 7 | ≈ 0.010498866213152 |
3 | ≈ 0.0044995140913508 | 8 | ≈ 0.011998704243602 |
4 | ≈ 0.0059993521218011 | 9 | ≈ 0.013498542274052 |
5 | ≈ 0.0074991901522514 | 10 | ≈ 0.014998380304503 |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
speed of sound (68 °F) | s | 225 to 1062 km/h (761–660 mph or 661–574 kn) | ≈ 343 m/s | Other Speed |
speed of sounds (68 °F) | knots | speed of sounds (68 °F) | knots |
---|---|---|---|
1 | ≈ 666.73866090713 | 6 | ≈ 4000.4319654428 |
2 | ≈ 1333.4773218143 | 7 | ≈ 4667.1706263499 |
3 | ≈ 2000.2159827214 | 8 | ≈ 5333.909287257 |
4 | ≈ 2666.9546436285 | 9 | ≈ 6000.6479481641 |
5 | ≈ 3333.6933045356 | 10 | ≈ 6667.3866090713 |
knots | speed of sounds (68 °F) |
---|---|
1 | ≈ 0.0014998 |
666.7386609 | ≈ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |