speed of light | 1 c | 2 c | 3 c | 4 c | 5 c | 6 c | 7 c | 8 c | 9 c | 10 c | 11 c | 12 c | 13 c | 14 c | 15 c | 16 c | 17 c | 18 c | 19 c | 20 c | 21 c | 22 c | 23 c | 24 c | 25 c | 26 c | 27 c | 28 c | 29 c | 30 c | 31 c | 32 c | 33 c | 34 c | 35 c | 36 c | 37 c | 38 c | 39 c | 40 c | 41 c | 42 c | 43 c | 44 c | 45 c | 46 c | 47 c | 48 c | 49 c | 50 c | 51 c | 52 c | 53 c | 54 c | 55 c | 56 c | 57 c | 58 c | 59 c | 60 c | 61 c | 62 c | 63 c | 64 c | 65 c | 66 c | 67 c | 68 c | 69 c | 70 c | 71 c | 72 c | 73 c | 74 c | 75 c | 76 c | 77 c | 78 c | 79 c | 80 c | 81 c | 82 c | 83 c | 84 c | 85 c | 86 c | 87 c | 88 c | 89 c | 90 c | 91 c | 92 c | 93 c | 94 c | 95 c | 96 c | 97 c | 98 c | 99 c | 100 c |
knot | 582,749,918.35853 kn | 1,165,499,836.7171 kn | 1,748,249,755.0756 kn | 2,330,999,673.4341 kn | 2,913,749,591.7927 kn | 3,496,499,510.1512 kn | 4,079,249,428.5097 kn | 4,661,999,346.8682 kn | 5,244,749,265.2268 kn | 5,827,499,183.5853 kn | 6,410,249,101.9438 kn | 6,992,999,020.3024 kn | 7,575,748,938.6609 kn | 8,158,498,857.0194 kn | 8,741,248,775.378 kn | 9,323,998,693.7365 kn | 9,906,748,612.095 kn | 10,489,498,530.454 kn | 11,072,248,448.812 kn | 11,654,998,367.171 kn | 12,237,748,285.529 kn | 12,820,498,203.888 kn | 13,403,248,122.246 kn | 13,985,998,040.605 kn | 14,568,747,958.963 kn | 15,151,497,877.322 kn | 15,734,247,795.68 kn | 16,316,997,714.039 kn | 16,899,747,632.397 kn | 17,482,497,550.756 kn | 18,065,247,469.114 kn | 18,647,997,387.473 kn | 19,230,747,305.832 kn | 19,813,497,224.19 kn | 20,396,247,142.549 kn | 20,978,997,060.907 kn | 21,561,746,979.266 kn | 22,144,496,897.624 kn | 22,727,246,815.983 kn | 23,309,996,734.341 kn | 23,892,746,652.7 kn | 24,475,496,571.058 kn | 25,058,246,489.417 kn | 25,640,996,407.775 kn | 26,223,746,326.134 kn | 26,806,496,244.492 kn | 27,389,246,162.851 kn | 27,971,996,081.209 kn | 28,554,745,999.568 kn | 29,137,495,917.927 kn | 29,720,245,836.285 kn | 30,302,995,754.644 kn | 30,885,745,673.002 kn | 31,468,495,591.361 kn | 32,051,245,509.719 kn | 32,633,995,428.078 kn | 33,216,745,346.436 kn | 33,799,495,264.795 kn | 34,382,245,183.153 kn | 34,964,995,101.512 kn | 35,547,745,019.87 kn | 36,130,494,938.229 kn | 36,713,244,856.587 kn | 37,295,994,774.946 kn | 37,878,744,693.305 kn | 38,461,494,611.663 kn | 39,044,244,530.022 kn | 39,626,994,448.38 kn | 40,209,744,366.739 kn | 40,792,494,285.097 kn | 41,375,244,203.456 kn | 41,957,994,121.814 kn | 42,540,744,040.173 kn | 43,123,493,958.531 kn | 43,706,243,876.89 kn | 44,288,993,795.248 kn | 44,871,743,713.607 kn | 45,454,493,631.965 kn | 46,037,243,550.324 kn | 46,619,993,468.683 kn | 47,202,743,387.041 kn | 47,785,493,305.4 kn | 48,368,243,223.758 kn | 48,950,993,142.117 kn | 49,533,743,060.475 kn | 50,116,492,978.834 kn | 50,699,242,897.192 kn | 51,281,992,815.551 kn | 51,864,742,733.909 kn | 52,447,492,652.268 kn | 53,030,242,570.626 kn | 53,612,992,488.985 kn | 54,195,742,407.343 kn | 54,778,492,325.702 kn | 55,361,242,244.06 kn | 55,943,992,162.419 kn | 56,526,742,080.778 kn | 57,109,491,999.136 kn | 57,692,241,917.495 kn | 58,274,991,835.853 kn |
The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second (approximately 3.00×108 m/s, or 186,282 mi/s); it is exact because the unit of length, the metre, is defined from this constant and the international standard for time.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
speed of light | c | ≡ 299792458 m/s | = 299792458 m/s | Other Speed |
speed of lights | knots | speed of lights | knots |
---|---|---|---|
1 | = 582749918.35853 | 6 | = 3496499510.1512 |
2 | = 1165499836.7171 | 7 | = 4079249428.5097 |
3 | = 1748249755.0756 | 8 | = 4661999346.8682 |
4 | = 2330999673.4341 | 9 | = 5244749265.2268 |
5 | = 2913749591.7927 | 10 | = 5827499183.5853 |
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 lights | knots | speed of lights |
---|---|---|---|
1 | = 1.7160019564083E-9 | 6 | = 1.029601173845E-8 |
2 | = 3.4320039128165E-9 | 7 | = 1.2012013694858E-8 |
3 | = 5.1480058692248E-9 | 8 | = 1.3728015651266E-8 |
4 | = 6.8640078256331E-9 | 9 | = 1.5444017607674E-8 |
5 | = 8.5800097820414E-9 | 10 | = 1.7160019564083E-8 |
speed of lights | knots |
---|---|
1 | = 582,749,918.35853 |
1.7160019564083 × 10-9 | = 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 …) |