Light year Converter
Created by: tinycalcs.com/en
Number of supported units: 46
Last update: 2026
The Light year Converter supports 46 different length units. This makes it possible to convert between light years [ly], metric, Anglo-American, nautical, astronomical, and other length units as desired. All length measurements are converted in real time and displayed with up to 20 decimal places, ensuring sufficient accuracy.
Conversion of light years
In order to convert light years [ly] into another unit of length, a conversion value is required. This value can be determined using a conversion table. However, the table is relatively large, confusing, and difficult for inexperienced users to understand. The tool below provides a solution to this problem by allowing the rounded conversion values for light years [ly] to be queried directly from the conversion table.
Determine conversion factor
Conversion between light years and millimeters
You can easily convert between millimeters [mm] and light years [ly] using the formulas provided below. For accurate results, it is important to follow the correct order of mathematical operations.
- Light years [ly] = millimeters [mm] ÷ 3,981,712 ÷ 23,760,459 ÷ 105
- Millimeters [mm] = light years [ly] * 3,981,712 * 23,760,459 * 105
Conversion between light years and centimeters
The fastest and easiest way to convert between centimeters [cm] and light years [ly] is to use the converter above. Manual conversions are also possible and can be done using the formulas provided below.
- Light years [ly] = centimeters [cm] ÷ 3,981,712 ÷ 23,760,459 ÷ 104
- Centimeters [cm] = light years [ly] * 3,981,712 * 23,760,459 * 104
Conversion between light years and decimeters
The two formulas below provide an easy way to convert between decimeters [dm] and light years [ly]. To ensure precise conversion results, it is important to follow the correct order of math operations.
- Light years [ly] = decimeters [dm] ÷ 3,981,712 ÷ 23,760,459 ÷ 103
- Decimeters [dm] = light years [ly] * 3,981,712 * 23,760,459 * 103
Conversion between light years and meters
You can easily convert between meters [m] and light years [ly] using the formulas provided below. For accurate results, it is important to follow the correct order of mathematical operations.
- Light years [ly] = meters [m] ÷ 3,981,712 ÷ 23,760.459 ÷ 105
- Meters [m] = light years [ly] * 3,981,712 * 23,760.459 * 105
Conversion between light years and kilometers
The fastest and easiest way to convert between kilometers [km] and light years [ly] is to use the converter above. Manual conversions are also possible and can be done using the formulas provided below.
- Light years [ly] = kilometers [km] ÷ 3,981,712 ÷ 2,376,045.9
- Kilometers [km] = light years [ly] * 3,981,712 * 2,376,045.9
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