---
title: "Square centimeters to Square kilometers — cm² to km² converter"
description: "1 square centimeter = 1 × 10^-10 square kilometers. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/square-cm-to-square-km/
site: "At One Place"
---

# Square centimeters to square kilometers

**1 square centimeter in square kilometers: 1 cm² = 1 × 10^-10 km²**

km² = cm² × 1 × 10^-10

To convert square centimeters to square kilometers, multiply by 1 × 10^-10. The table below gives the values people look up most often, and the converter works for any number.

## Square centimeters to square kilometers table

*Common square centimeter values converted to square kilometers.*

| Square centimeters | Square kilometers |
| --- | --- |
| 1 cm² | 1 × 10^-10 |
| 2 cm² | 2 × 10^-10 |
| 3 cm² | 3 × 10^-10 |
| 4 cm² | 4 × 10^-10 |
| 5 cm² | 5 × 10^-10 |
| 10 cm² | 1 × 10^-9 |
| 15 cm² | 1.5 × 10^-9 |
| 20 cm² | 2 × 10^-9 |
| 25 cm² | 2.5 × 10^-9 |
| 30 cm² | 3 × 10^-9 |
| 40 cm² | 4 × 10^-9 |
| 50 cm² | 5 × 10^-9 |
| 75 cm² | 7.5 × 10^-9 |
| 100 cm² | 1 × 10^-8 |
| 250 cm² | 2.5 × 10^-8 |
| 500 cm² | 5 × 10^-8 |
| 1,000 cm² | 1 × 10^-7 |

## How the conversion works

The relationship is km² = cm² × 1 × 10^-10. Both units measure area, so the conversion is a fixed factor that never changes.

## Common questions

### How many square kilometers are in one square centimeter?

One square centimeter equals 1 × 10^-10 square kilometers. km² = cm² × 1 × 10^-10.

### How do you convert square centimeters to square kilometers?

Use km² = cm² × 1 × 10^-10. So 10 cm² is 1 × 10^-9 km².

### How many square centimeters are in one square kilometer?

One square kilometer equals 10,000,000,000 square centimeters, which is the reverse of the conversion above.

## Related pages

- [Square kilometers to Square centimeters](https://atoneplace.net/convert/square-km-to-square-cm/)
- [Square centimeters to Square meters](https://atoneplace.net/convert/square-cm-to-square-meters/)
- [Square centimeters to Hectares](https://atoneplace.net/convert/square-cm-to-hectares/)
- [Square centimeters to Acres](https://atoneplace.net/convert/square-cm-to-acres/)
- [Square centimeters to Square feet](https://atoneplace.net/convert/square-cm-to-square-feet/)
- [Square centimeters to Square miles](https://atoneplace.net/convert/square-cm-to-square-miles/)

## 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/)