---
title: "1 cm to mm = 10 mm"
description: "1 centimeter is 10 millimeters. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/1-cm-to-mm/
site: "At One Place"
---

# 1 cm to mm

**1 centimeter in millimeters: 1 cm = 10 mm**

mm = cm × 10

1 centimeter is 10 millimeters. To get there, multiply by 10.

## Values either side

*Centimeters near 1, converted to millimeters.*

| Centimeters | Millimeters |
| --- | --- |
| 0.5 cm | 5 |
| 1 cm ← | 10 |
| 1.5 cm | 15 |
| 2 cm | 20 |
| 2.5 cm | 25 |
| 3 cm | 30 |

## How the conversion works

The relationship is mm = cm × 10. Both units measure length, so the conversion is a fixed factor that never changes.

## Common questions

### What is 1 cm in millimeters?

1 cm is 10 mm.

### How do you convert centimeters to millimeters?

Multiply by 10.

## Related pages

- [Centimeters to millimeters](https://atoneplace.net/convert/cm-to-mm/)
- [1 mm to cm](https://atoneplace.net/convert/1-mm-to-cm/)
- [0.5 cm to mm](https://atoneplace.net/convert/0-5-cm-to-mm/)
- [1.5 cm to mm](https://atoneplace.net/convert/1-5-cm-to-mm/)
- [2 cm to mm](https://atoneplace.net/convert/2-cm-to-mm/)
- [2.5 cm to mm](https://atoneplace.net/convert/2-5-cm-to-mm/)
- [3 cm to mm](https://atoneplace.net/convert/3-cm-to-mm/)

## 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/)