| light-second | 1 light-second | 2 light-second | 3 light-second | 4 light-second | 5 light-second | 6 light-second | 7 light-second | 8 light-second | 9 light-second | 10 light-second | 11 light-second | 12 light-second | 13 light-second | 14 light-second | 15 light-second | 16 light-second | 17 light-second | 18 light-second | 19 light-second | 20 light-second | 21 light-second | 22 light-second | 23 light-second | 24 light-second | 25 light-second | 26 light-second | 27 light-second | 28 light-second | 29 light-second | 30 light-second | 31 light-second | 32 light-second | 33 light-second | 34 light-second | 35 light-second | 36 light-second | 37 light-second | 38 light-second | 39 light-second | 40 light-second | 41 light-second | 42 light-second | 43 light-second | 44 light-second | 45 light-second | 46 light-second | 47 light-second | 48 light-second | 49 light-second | 50 light-second | 51 light-second | 52 light-second | 53 light-second | 54 light-second | 55 light-second | 56 light-second | 57 light-second | 58 light-second | 59 light-second | 60 light-second | 61 light-second | 62 light-second | 63 light-second | 64 light-second | 65 light-second | 66 light-second | 67 light-second | 68 light-second | 69 light-second | 70 light-second | 71 light-second | 72 light-second | 73 light-second | 74 light-second | 75 light-second | 76 light-second | 77 light-second | 78 light-second | 79 light-second | 80 light-second | 81 light-second | 82 light-second | 83 light-second | 84 light-second | 85 light-second | 86 light-second | 87 light-second | 88 light-second | 89 light-second | 90 light-second | 91 light-second | 92 light-second | 93 light-second | 94 light-second | 95 light-second | 96 light-second | 97 light-second | 98 light-second | 99 light-second | 100 light-second |
| furlong | 1,490,259.1764098 fur | 2,980,518.3528195 fur | 4,470,777.5292293 fur | 5,961,036.7056391 fur | 7,451,295.8820488 fur | 8,941,555.0584586 fur | 10,431,814.234868 fur | 11,922,073.411278 fur | 13,412,332.587688 fur | 14,902,591.764098 fur | 16,392,850.940507 fur | 17,883,110.116917 fur | 19,373,369.293327 fur | 20,863,628.469737 fur | 22,353,887.646147 fur | 23,844,146.822556 fur | 25,334,405.998966 fur | 26,824,665.175376 fur | 28,314,924.351786 fur | 29,805,183.528195 fur | 31,295,442.704605 fur | 32,785,701.881015 fur | 34,275,961.057425 fur | 35,766,220.233834 fur | 37,256,479.410244 fur | 38,746,738.586654 fur | 40,236,997.763064 fur | 41,727,256.939473 fur | 43,217,516.115883 fur | 44,707,775.292293 fur | 46,198,034.468703 fur | 47,688,293.645113 fur | 49,178,552.821522 fur | 50,668,811.997932 fur | 52,159,071.174342 fur | 53,649,330.350752 fur | 55,139,589.527161 fur | 56,629,848.703571 fur | 58,120,107.879981 fur | 59,610,367.056391 fur | 61,100,626.2328 fur | 62,590,885.40921 fur | 64,081,144.58562 fur | 65,571,403.76203 fur | 67,061,662.93844 fur | 68,551,922.114849 fur | 70,042,181.291259 fur | 71,532,440.467669 fur | 73,022,699.644079 fur | 74,512,958.820488 fur | 76,003,217.996898 fur | 77,493,477.173308 fur | 78,983,736.349718 fur | 80,473,995.526127 fur | 81,964,254.702537 fur | 83,454,513.878947 fur | 84,944,773.055357 fur | 86,435,032.231766 fur | 87,925,291.408176 fur | 89,415,550.584586 fur | 90,905,809.760996 fur | 92,396,068.937406 fur | 93,886,328.113815 fur | 95,376,587.290225 fur | 96,866,846.466635 fur | 98,357,105.643045 fur | 99,847,364.819454 fur | 101,337,623.99586 fur | 102,827,883.17227 fur | 104,318,142.34868 fur | 105,808,401.52509 fur | 107,298,660.7015 fur | 108,788,919.87791 fur | 110,279,179.05432 fur | 111,769,438.23073 fur | 113,259,697.40714 fur | 114,749,956.58355 fur | 116,240,215.75996 fur | 117,730,474.93637 fur | 119,220,734.11278 fur | 120,710,993.28919 fur | 122,201,252.4656 fur | 123,691,511.64201 fur | 125,181,770.81842 fur | 126,672,029.99483 fur | 128,162,289.17124 fur | 129,652,548.34765 fur | 131,142,807.52406 fur | 132,633,066.70047 fur | 134,123,325.87688 fur | 135,613,585.05329 fur | 137,103,844.2297 fur | 138,594,103.40611 fur | 140,084,362.58252 fur | 141,574,621.75893 fur | 143,064,880.93534 fur | 144,555,140.11175 fur | 146,045,399.28816 fur | 147,535,658.46457 fur | 149,025,917.64098 fur |
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in onesecond, and is equal to exactly 299792458 metres (just over 186282 miles).
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| light-second | ≡ Distance light travels in one second in vacuum | ≡ 299 792 458 m | Science - Astronomy (Length) |
| light-seconds | furlong | light-seconds | furlong |
|---|---|---|---|
| 1 | = 1490259.1764098 | 4 | = 5961036.7056391 |
| 1.5 | = 2235388.7646147 | 4.5 | = 6706166.293844 |
| 2 | = 2980518.3528195 | 5 | = 7451295.8820488 |
| 2.5 | = 3725647.9410244 | 5.5 | = 8196425.4702537 |
| 3 | = 4470777.5292293 | 6 | = 8941555.0584586 |
A furlong is a measure of distance in imperial units and U.S. customary units equal to one-eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| furlong | fur | ≡ 10 chains = 660 ft = 220 yd | = 201.168 m | Imperial/US |
| furlong | light-seconds | furlong | light-seconds |
|---|---|---|---|
| 1 | = 6.7102421902822E-7 | 4 | = 2.6840968761129E-6 |
| 1.5 | = 1.0065363285423E-6 | 4.5 | = 3.019608985627E-6 |
| 2 | = 1.3420484380564E-6 | 5 | = 3.3551210951411E-6 |
| 2.5 | = 1.6775605475705E-6 | 5.5 | = 3.6906332046552E-6 |
| 3 | = 2.0130726570847E-6 | 6 | = 4.0261453141693E-6 |
| light-seconds | furlong |
|---|---|
| 1 | = 1,490,259.1764098 |
| 6.7102421902822 × 10-7 | = 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 …) |