# Light years to km - 8 Light Years to Kilometers

Other high-precision values are not derived from a IAU system.

Before 1929 different countries had different definitions, and the Soviet Union, the United Kingdom and the United States did not immediately accept the international value.

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### Convert Light Years to Kilometers

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London: Groombridge and Sons.
American weights and measures are based on units used in Britain prior to 1826, when imperial system was officially established.
Although modern astronomers often prefer to use thelight-years are also popularly used to gauge the expanses of interstellar and intergalactic space.

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+291reps
1 Light-year = 9,460,700,000,000 Kilometers Conversion formula km = ly ร 9,460,700,000,000 Calculation To convert from Kilometer (km) to Light-year (ly) from the data you provided, just take the following steps. Thus, 1 Light-year is equal to 9,460,700,000,000 Kilometers Convert Light-years to Kilometers Convert Kilometers to Light-years
+45reps
A light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 ร 1012 kilometres (9.46 petametres, or about 5.88 ร 1012 (nearly six trillion) miles).
+342reps
If we want to calculate how many Kilometers are 21.9 Light Years we have to multiply 21.9 by 47303652362904 and divide the product by 5. So for 21.9 we have: (21.9 ร 47303652362904) รท 5 = 1.0359499867476E+15 รท 5 = 2.0718999734952E+14 Kilometers So finally 21.9 light year = 207189997349520 km Popular Unit Conversions
+226reps
One light year is approximately 5.880 trillion miles and equals exactly 9460730472580.8 kilometers or 9460730472580800 meters. You can convert Light Years to other units here by enter amount of if into green input below. You can also check some basic conversions in Light Years Conversion Table. light years astronomical units kilometers