Light Second Conversions

Use this easy and mobile-friendly calculator to convert between Light Seconds and other units of Astronomy.
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1 Light Second ≈
0.000000031688088 Light Years
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Light Seconds
A light second is the distance that light travels in one second. It is exactly 299,792.458 kilometers or about 186,000 miles.
Light Years
A light year is the distance that light travels in one year. The year used by the International Astronomical Union is 365.25 days. A light year is defined as exactly 9,460,730,472,580.8 kilometers.

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