# Square meters to Hectares (m² to ha)

> Convert square meters to hectares: 1 m² = 0.0001 ha. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `square-meters-to-hectares` · Quantity: Area (`area`, base unit m2) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/square-meters-to-hectares · This document: https://tttkmbb.com/conversion/square-meters-to-hectares.md · JSON: https://tttkmbb.com/conversion/square-meters-to-hectares.json (add `?value=` for a result)

## Formula

- `1 m² = 0.0001 ha`
- `hectares = square meters × 0.0001`
- Reverse: `square meters = hectares × 10000`

The factor follows from the SI definitions of both units (NIST SP 811); values below are rounded to 6 significant figures, the API returns up to 12.

## Worked examples

- 5 m² = 0.0005 ha
- 12.5 m² = 0.00125 ha
- 100 m² = 0.01 ha

## Conversion table

| Square meters (m²) | Hectares (ha) |
| --- | --- |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 3 | 0.0003 |
| 4 | 0.0004 |
| 5 | 0.0005 |
| 6 | 0.0006 |
| 7 | 0.0007 |
| 8 | 0.0008 |
| 9 | 0.0009 |
| 10 | 0.001 |
| 15 | 0.0015 |
| 20 | 0.002 |
| 25 | 0.0025 |
| 30 | 0.003 |
| 40 | 0.004 |
| 50 | 0.005 |
| 75 | 0.0075 |
| 100 | 0.01 |
| 200 | 0.02 |
| 250 | 0.025 |
| 500 | 0.05 |
| 1000 | 0.1 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=m2&to_unit=ha` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":5,"from_unit":"m2","to_unit":"ha"}`
- All area units: https://tttkmbb.com/api/v1/units?quantity=area · full converter: [Area Converter](https://tttkmbb.com/conversion/area.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many hectares are in one square meter?**

1 m² = 0.0001 ha. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

**What is the formula to convert square meters to hectares?**

Multiply the value in square meters by 0.0001: hectares = square meters × 0.0001. For example, 5 m² = 0.0005 ha.

**How do I convert hectares back to square meters?**

Multiply by the inverse factor 10000 (square meters = hectares × 10000), or use the hectares-to-square meters page.

## Related conversions

- [Hectares to square meters](https://tttkmbb.com/conversion/hectares-to-square-meters.md) (reverse)
- [Square meters to Square feet](https://tttkmbb.com/conversion/square-meters-to-square-feet.md)
- [Square feet to Square meters](https://tttkmbb.com/conversion/square-feet-to-square-meters.md)
- [Acres to Hectares](https://tttkmbb.com/conversion/acres-to-hectares.md)
- [Hectares to Acres](https://tttkmbb.com/conversion/hectares-to-acres.md)
- [Acres to Square meters](https://tttkmbb.com/conversion/acres-to-square-meters.md)
- [Square meters to Acres](https://tttkmbb.com/conversion/square-meters-to-acres.md)
- [Square kilometers to Square miles](https://tttkmbb.com/conversion/square-km-to-square-miles.md)
- [Square miles to Square kilometers](https://tttkmbb.com/conversion/square-miles-to-square-km.md)

## Data Sources

- NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors — https://www.nist.gov/pml/special-publication-811 (standard, retrieved 2026-09-24)
- BIPM – The International System of Units (SI Brochure, 9th edition) — https://www.bipm.org/en/publications/si-brochure (standard, retrieved 2026-09-24)
- Wikipedia – Conversion of units — https://en.wikipedia.org/wiki/Conversion_of_units (reference, retrieved 2026-09-24)