---
title: "Centimeters to Light-years — cm to ly converter"
description: "1 centimeter = 1.057 × 10^-18 light-years. Convert centimeters to light-years with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/cm-to-light-years/
site: "At One Place"
---

# Centimeters to light-years

**1 centimeter in light-years: 1 cm = 1.057 × 10^-18 ly**

ly = cm × 1.057000834 × 10^-18

To convert centimeters to light-years, multiply by 1.057000834 × 10^-18. The table below gives the values people look up most often, and the converter works for any number.

## Centimeters to light-years table

*Common centimeter values converted to light-years.*

| Centimeters | Light-years |
| --- | --- |
| 1 cm | 1.057 × 10^-18 |
| 2 cm | 2.114 × 10^-18 |
| 3 cm | 3.171 × 10^-18 |
| 4 cm | 4.228 × 10^-18 |
| 5 cm | 5.285 × 10^-18 |
| 10 cm | 1.057 × 10^-17 |
| 15 cm | 1.586 × 10^-17 |
| 20 cm | 2.114 × 10^-17 |
| 25 cm | 2.643 × 10^-17 |
| 30 cm | 3.171 × 10^-17 |
| 40 cm | 4.228 × 10^-17 |
| 50 cm | 5.285 × 10^-17 |
| 75 cm | 7.928 × 10^-17 |
| 100 cm | 1.057 × 10^-16 |
| 250 cm | 2.643 × 10^-16 |
| 500 cm | 5.285 × 10^-16 |
| 1,000 cm | 1.057 × 10^-15 |

## How the conversion works

The relationship is ly = cm × 1.057000834 × 10^-18. Both units measure length, so the conversion is a fixed factor that never changes.

## Common questions

### How many light-years are in one centimeter?

One centimeter equals 1.057 × 10^-18 light-years. ly = cm × 1.057000834 × 10^-18.

### How do you convert centimeters to light-years?

Use ly = cm × 1.057000834 × 10^-18. So 10 cm is 1.057 × 10^-17 ly.

### How many centimeters are in one light-year?

One light-year equals 9.4607305 × 10^17 centimeters, which is the reverse of the conversion above.

## Related pages

- [Light-years to Centimeters](https://atoneplace.net/convert/light-years-to-cm/)
- [Centimeters to Meters](https://atoneplace.net/convert/cm-to-meters/)
- [Centimeters to Kilometers](https://atoneplace.net/convert/cm-to-km/)
- [Centimeters to Millimeters](https://atoneplace.net/convert/cm-to-mm/)
- [Centimeters to Miles](https://atoneplace.net/convert/cm-to-miles/)
- [Centimeters to Yards](https://atoneplace.net/convert/cm-to-yards/)
- [Centimeters to Feet](https://atoneplace.net/convert/cm-to-feet/)
- [Centimeters to Inches](https://atoneplace.net/convert/cm-to-inches/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)