Hectares to Acres Converter (ha to ac)
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Formula
To convert hectares to acres, multiply the value by 2.47105381.
ac = ha × 2.47105381
Example calculation
Convert 5 ha to ac:
5 ha × 2.47105381 = 12.3553 ac
Conversion table
| ha | ac |
|---|---|
| 1 | 2.4711 |
| 2 | 4.9421 |
| 3 | 7.4132 |
| 4 | 9.8842 |
| 5 | 12.3553 |
| 6 | 14.8263 |
| 7 | 17.2974 |
| 8 | 19.7684 |
| 9 | 22.2395 |
| 10 | 24.7105 |
| 15 | 37.0658 |
| 20 | 49.4211 |
| 25 | 61.7763 |
| 30 | 74.1316 |
| 35 | 86.4869 |
| 40 | 98.8422 |
| 45 | 111.1974 |
| 50 | 123.5527 |
| 55 | 135.9080 |
| 60 | 148.2632 |
| 65 | 160.6185 |
| 70 | 172.9738 |
| 75 | 185.3290 |
| 80 | 197.6843 |
| 85 | 210.0396 |
| 90 | 222.3948 |
| 95 | 234.7501 |
| 100 | 247.1054 |
| 200 | 494.2108 |
| 500 | 1235.5269 |
| 1000 | 2471.0538 |
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About the units
- Hectare (ha)
- Used for farmland and forests worldwide. Equal to 10,000 square metres, introduced in the French metric system in 1795.
- Acre (ac)
- Used for land area in the US and UK. Exactly 4,046.8564224 square metres, historically a day's ploughing for a yoke of oxen.
Frequently asked questions
- How do I convert hectares to acres?
- To convert hectares to acres, multiply the value by 2.47105381.
- How many acres are in 1 hectare?
- 1 hectare equals 2.47105 ac.
- How many acres are in 10 hectares?
- 10 ha equals 24.7105 ac.
- How do I convert acres back to hectares?
- Use the reverse converter: 1 acre equals 0.404686 ha.
- Is this converter accurate?
- Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.
Related conversions
- Reverse conversion: acres → hectares
- square centimeters → hectares
- hectares → square centimeters
- square centimeters → acres
- acres → square centimeters
- square meters → hectares
- hectares → square meters
- square meters → acres
- acres → square meters