How to convert hectares to acres
One hectare equals 2.4711 acres, so multiply the number of hectares by 2.4711:
ac = ha × 2.4711
ha = ac ÷ 2.4711 (1 ac = 0.404686 ha)
Example: 0.5 ha → 0.5 × 2.4711 = 1.2355 ac.
Going the other way, divide by 2.4711, or multiply by 0.404686; the acres to hectares converter does it for you.
Everyday values
| Hectares | Acres | For example |
|---|---|---|
| 0.5 ha | 1.2355 ac | half a hectare |
| 1 ha | 2.4711 ac | 100 m × 100 m |
| 5 ha | 12.3553 ac | a small farm |
| 100 ha | 247.105 ac | one square kilometre |
When you need this conversion
One hectare is the area of a square 100 metres on each side, and 100 hectares make one square kilometre. Farm sizes, forest areas and land prices are usually quoted per hectare outside the US and UK.
Hectare to acre conversion table
| ha | ac | ha | ac |
|---|---|---|---|
| 1 ha | 2.4711 ac | 11 ha | 27.1816 ac |
| 2 ha | 4.9421 ac | 12 ha | 29.6526 ac |
| 3 ha | 7.4132 ac | 13 ha | 32.1237 ac |
| 4 ha | 9.8842 ac | 14 ha | 34.5948 ac |
| 5 ha | 12.3553 ac | 15 ha | 37.0658 ac |
| 6 ha | 14.8263 ac | 16 ha | 39.5369 ac |
| 7 ha | 17.2974 ac | 17 ha | 42.0079 ac |
| 8 ha | 19.7684 ac | 18 ha | 44.479 ac |
| 9 ha | 22.2395 ac | 19 ha | 46.95 ac |
| 10 ha | 24.7105 ac | 20 ha | 49.4211 ac |
About the units
- Hectare (ha): 10,000 square metres (100 m × 100 m).
- Acre (ac): 43,560 square feet, about 4,046.86 m².
Both are units of area. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many acres are in one hectare?
One hectare is 2.4711 acres. One acre is 0.404686 hectares.
How do I convert hectares to acres?
Multiply the value in hectares by 2.4711. To go back, divide by 2.4711.
What is 0.5 ha in acres?
0.5 ha = 1.2355 ac.
What is 5 ha in acres?
5 ha = 12.3553 ac.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.