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 |
mile per hour | 670,616,629.3844 mph | 1,341,233,258.7688 mph | 2,011,849,888.1532 mph | 2,682,466,517.5376 mph | 3,353,083,146.922 mph | 4,023,699,776.3064 mph | 4,694,316,405.6908 mph | 5,364,933,035.0752 mph | 6,035,549,664.4596 mph | 6,706,166,293.844 mph | 7,376,782,923.2283 mph | 8,047,399,552.6127 mph | 8,718,016,181.9971 mph | 9,388,632,811.3815 mph | 10,059,249,440.766 mph | 10,729,866,070.15 mph | 11,400,482,699.535 mph | 12,071,099,328.919 mph | 12,741,715,958.304 mph | 13,412,332,587.688 mph | 14,082,949,217.072 mph | 14,753,565,846.457 mph | 15,424,182,475.841 mph | 16,094,799,105.225 mph | 16,765,415,734.61 mph | 17,436,032,363.994 mph | 18,106,648,993.379 mph | 18,777,265,622.763 mph | 19,447,882,252.147 mph | 20,118,498,881.532 mph | 20,789,115,510.916 mph | 21,459,732,140.301 mph | 22,130,348,769.685 mph | 22,800,965,399.069 mph | 23,471,582,028.454 mph | 24,142,198,657.838 mph | 24,812,815,287.223 mph | 25,483,431,916.607 mph | 26,154,048,545.991 mph | 26,824,665,175.376 mph | 27,495,281,804.76 mph | 28,165,898,434.145 mph | 28,836,515,063.529 mph | 29,507,131,692.913 mph | 30,177,748,322.298 mph | 30,848,364,951.682 mph | 31,518,981,581.067 mph | 32,189,598,210.451 mph | 32,860,214,839.835 mph | 33,530,831,469.22 mph | 34,201,448,098.604 mph | 34,872,064,727.989 mph | 35,542,681,357.373 mph | 36,213,297,986.757 mph | 36,883,914,616.142 mph | 37,554,531,245.526 mph | 38,225,147,874.911 mph | 38,895,764,504.295 mph | 39,566,381,133.679 mph | 40,236,997,763.064 mph | 40,907,614,392.448 mph | 41,578,231,021.832 mph | 42,248,847,651.217 mph | 42,919,464,280.601 mph | 43,590,080,909.986 mph | 44,260,697,539.37 mph | 44,931,314,168.754 mph | 45,601,930,798.139 mph | 46,272,547,427.523 mph | 46,943,164,056.908 mph | 47,613,780,686.292 mph | 48,284,397,315.676 mph | 48,955,013,945.061 mph | 49,625,630,574.445 mph | 50,296,247,203.83 mph | 50,966,863,833.214 mph | 51,637,480,462.598 mph | 52,308,097,091.983 mph | 52,978,713,721.367 mph | 53,649,330,350.752 mph | 54,319,946,980.136 mph | 54,990,563,609.52 mph | 55,661,180,238.905 mph | 56,331,796,868.289 mph | 57,002,413,497.674 mph | 57,673,030,127.058 mph | 58,343,646,756.442 mph | 59,014,263,385.827 mph | 59,684,880,015.211 mph | 60,355,496,644.596 mph | 61,026,113,273.98 mph | 61,696,729,903.364 mph | 62,367,346,532.749 mph | 63,037,963,162.133 mph | 63,708,579,791.518 mph | 64,379,196,420.902 mph | 65,049,813,050.286 mph | 65,720,429,679.671 mph | 66,391,046,309.055 mph | 67,061,662,938.44 mph |
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 | miles per hour | speed of lights | miles per hour |
---|---|---|---|
1 | = 670616629.3844 | 6 | = 4023699776.3064 |
2 | = 1341233258.7688 | 7 | = 4694316405.6908 |
3 | = 2011849888.1532 | 8 | = 5364933035.0752 |
4 | = 2682466517.5376 | 9 | = 6035549664.4596 |
5 | = 3353083146.922 | 10 | = 6706166293.844 |
Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. Although kilometres per hour is now the most widely used measure of speed, miles per hour remains the standard unit for speed limits in the United States, the United Kingdom, Antigua & Barbuda and Puerto Rico, although the latter two use kilometres for long distances.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
mile per hour | mph | ≡ 1 mi/h | = 0.44704 m/s | Imperial/US |
miles per hour | speed of lights | miles per hour | speed of lights |
---|---|---|---|
1 | = 1.4911649311738E-9 | 6 | = 8.9469895870429E-9 |
2 | = 2.9823298623476E-9 | 7 | = 1.0438154518217E-8 |
3 | = 4.4734947935215E-9 | 8 | = 1.1929319449391E-8 |
4 | = 5.9646597246953E-9 | 9 | = 1.3420484380564E-8 |
5 | = 7.4558246558691E-9 | 10 | = 1.4911649311738E-8 |
speed of lights | miles per hour |
---|---|
1 | = 670,616,629.3844 |
1.4911649311738 × 10-9 | = 1 |
You can find the conversion in other languages in the following:
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 …) |