---
title: "40 km² to ha = 4,000 ha"
description: "40 square kilometers is 4,000 hectares. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/40-square-km-to-hectares/
site: "At One Place"
---

# 40 km² to ha

**40 square kilometers in hectares: 40 km² = 4,000 ha**

ha = km² × 100

40 square kilometers is 4,000 hectares. To get there, multiply by 100.

## Values either side

*Square kilometers near 40, converted to hectares.*

| Square kilometers | Hectares |
| --- | --- |
| 32 km² | 3,200 |
| 35 km² | 3,500 |
| 36 km² | 3,600 |
| 37 km² | 3,700 |
| 40 km² ← | 4,000 |
| 45 km² | 4,500 |
| 50 km² | 5,000 |
| 55 km² | 5,500 |
| 60 km² | 6,000 |

## How the conversion works

The relationship is ha = km² × 100. Both units measure area, so the conversion is a fixed factor that never changes.

## Common questions

### What is 40 km² in hectares?

40 km² is 4,000 ha.

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

Multiply by 100.

## Related pages

- [Square kilometers to hectares](https://atoneplace.net/convert/square-km-to-hectares/)
- [40 ha to km²](https://atoneplace.net/convert/40-hectares-to-square-km/)
- [32 km² to ha](https://atoneplace.net/convert/32-square-km-to-hectares/)
- [35 km² to ha](https://atoneplace.net/convert/35-square-km-to-hectares/)
- [36 km² to ha](https://atoneplace.net/convert/36-square-km-to-hectares/)
- [37 km² to ha](https://atoneplace.net/convert/37-square-km-to-hectares/)
- [45 km² to ha](https://atoneplace.net/convert/45-square-km-to-hectares/)
- [50 km² to ha](https://atoneplace.net/convert/50-square-km-to-hectares/)
- [55 km² to ha](https://atoneplace.net/convert/55-square-km-to-hectares/)
- [60 km² to ha](https://atoneplace.net/convert/60-square-km-to-hectares/)

## 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/)