Convert Hectares to Acres (ha to ac)
1 hectare (ha) = 2.471053815 acres (ac). 1 ac = 0.4046856422 ha. Example: 1 ha = 1 × 2.471053815 = 2.471053815 ac.
Also searched as hectares to ac, hectares in ac, hectares into acres, ha to ac, ha in acres, ha into acre, hectare to acre, ha to acres converter and how many acres in a hectare.
1 ha = 2.471053815 ac
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk hectare to acre converter to paste a column from Excel.
How to Convert Hectare to Acre
- 1 ha = 2.471053815 ac
- 1 ac = 0.4046856422 ha
- Example: convert 1 ha to ac: 1 ha = 1 × 2.471053815 ac = 2.471053815 ac
Formula
ac = ha × 2.471053814672
Derivation from SI units:
- 1 ha = 100 m × 100 m = 10 000 m² (a non-SI unit accepted for use with the SI)
- 1 acre = 43 560 ft² = 4 046.856 422 4 m² (international foot; the US survey foot was retired at the end of 2022)
- 1 ha = 10000 m² ÷ 4046.8564224 m² per ac = 2.471053814672 ac
Both units are defined exactly, so the factor is exact. Hectare definition: hectare; Acre definition: acre.
Worked examples
- 1 ha is 2.471053815 ac.
1 ha × 2.471053815 = 2.471053815 ac - A 2.5 ha plot is 6.177634537 ac.
2.5 ha × 2.471053815 = 6.177634537 ac
Hectare to Acre conversion table
| Hectares (ha) | Acres (ac) |
|---|---|
| 0.01 ha | 0.02471053815 ac |
| 0.1 ha | 0.2471053815 ac |
| 0.25 ha | 0.6177634537 ac |
| 0.5 ha | 1.235526907 ac |
| 1 ha | 2.471053815 ac |
| 2 ha | 4.942107629 ac |
| 2.5 ha | 6.177634537 ac |
| 5 ha | 12.35526907 ac |
| 10 ha | 24.71053815 ac |
| 20 ha | 49.42107629 ac |
| 40.4686 ha | 100.0000884 ac |
| 50 ha | 123.5526907 ac |
| 100 ha | 247.1053815 ac |
| 1000 ha | 2471.053815 ac |
Where it's used
Hectares from metric land records, crop and forestry data are converted to acres for US, UK and Indian buyers and listings. Multiply by about 2.4711.
Hectare to other area units
| Conversion | 1 ha equals |
|---|---|
| hectare to acre | 2.471053815 ac |
| hectare to square meter | 10000 m² |
| hectare to square centimeter | 100000000 cm² |
| hectare to square foot | 107639.1042 ft² |
| hectare to square inch | 15500031 in² |
| hectare to square millimeter | 10000000000 mm² |
| hectare to square kilometre | 0.01 km² |
| hectare to square yard | 11959.90046 yd² |
Show 1 more units
| hectare to square mile | 0.003861021585 mi² |
|---|
Frequently asked questions
How many acres are in a hectare?
1 ha = 2.471053815 ac.
How many acres are in 1 hectare?
1 ha = 2.471053815 ac.
How do I convert hectares to acres?
Multiply the value in ha by 2.471053815. For example, 1 ha × 2.471053815 = 2.471053815 ac.
Is the ha to ac conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8, non-SI units accepted for use with the SI.
- NIST Handbook 44, Appendix C: General Tables of Units of Measurement, National Institute of Standards and Technology , Appendix C, units of area.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Hectares to Acres (ha to ac). Retrieved October 25, 2026, from https://scientificconverters.com/area/hectares-to-acres/
IEEE
Scientific Converters, "Convert Hectares to Acres (ha to ac)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/area/hectares-to-acres/