## Convert light year to light second

 light-year light-second

How many light-year in 1 light-second? The answer is 3.1688087814029E-8. We assume you are converting between light year and light second. You can view more details on each measurement unit: light-year or light-second The SI base unit for length is the metre. 1 metre is equal to 1.0570008340246E-16 light-year, or 3.3356409519815E-9 light-second. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between light years and light seconds. Type in your own numbers in the form to convert the units!

## Quick conversion chart of light-year to light-second

1 light-year to light-second = 31557600 light-second

2 light-year to light-second = 63115200 light-second

3 light-year to light-second = 94672800 light-second

4 light-year to light-second = 126230400 light-second

5 light-year to light-second = 157788000 light-second

6 light-year to light-second = 189345600 light-second

7 light-year to light-second = 220903200 light-second

8 light-year to light-second = 252460800 light-second

9 light-year to light-second = 284018400 light-second

10 light-year to light-second = 315576000 light-second

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You can do the reverse unit conversion from light-second to light-year, or enter any two units below:

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## Definition: Light-year

A light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in free space and infinitely far away from any gravitational or magnetic fields, in one Julian year (365.25 days of 86400 seconds each).

## Definition: Light-second

A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the light second. It is just over 186,282 miles and almost 109 feet.

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