Acre to Hectare Converter
Convert Acre (ac) to Hectare (ha) instantly. 1 ac = 0.404686 ha.
Area Converter
20 units available
1 ac = 0.404686 ha
Formula:
ha = ac × 0.4046856422With your value: 1 ac = 0.40468564 ha
How big is that?
Everyday references on a logarithmic scale, all expressed in acre so you can sanity-check the result.
Other Acre to Hectare conversions
Acre to Hectare Conversion Table
| Acre (ac) | Hectare (ha) |
|---|---|
| 0.5 | 0.202343 |
| 1 | 0.404686 |
| 2 | 0.809371 |
| 5 | 2.023428 |
| 10 | 4.046856 |
| 15 | 6.070285 |
| 20 | 8.093713 |
| 25 | 10.117141 |
| 50 | 20.234282 |
| 100 | 40.468564 |
| 250 | 101.171411 |
| 500 | 202.342821 |
| 1000 | 404.685642 |
Hectare to Acre Conversion Table
| Hectare (ha) | Acre (ac) |
|---|---|
| 0.5 | 1.235527 |
| 1 | 2.471054 |
| 2 | 4.942108 |
| 5 | 12.355269 |
| 10 | 24.710538 |
| 15 | 37.065807 |
| 20 | 49.421076 |
| 25 | 61.776345 |
| 50 | 123.552691 |
| 100 | 247.105381 |
| 250 | 617.763454 |
| 500 | 1,235.526907 |
| 1000 | 2,471.053815 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Acre (ac)
Area
Derived from the square metre via the length definitions above.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Hectare (ha)
Area
Derived from the square metre via the length definitions above.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Acre to Hectare
To convert from Acre (ac) to Hectare (ha), multiply the value by 0.4046856422.
Formula: ha = ac × 0.4046856422
Reverse: ac = ha × 2.4710538147
Step-by-Step Example
- Start with your value in Acre. For example: 5 ac
- Multiply by the conversion factor: 5 x 0.4046856422
- The result is: 2.023428 ha
About Acre
The acre is a unit of land area equal to 43,560 square feet or about 4,047 square meters. It is used primarily in the US, UK, and former British colonies.
Fun Fact: An acre was originally defined as the amount of land a yoke of oxen could plow in one day.
Common uses: land measurement, agriculture, real estate.
About Hectare
The hectare equals 10,000 square meters or about 2.471 acres. It is the primary unit for land measurement in most countries.
Common uses: agriculture, forestry, land planning.
Frequently Asked Questions
How many Hectare are in 1 Acre?
There are exactly 0.4046856422 Hectare in 1 Acre. This means the conversion factor from Acre to Hectare is 0.4046856422.
What is the formula to convert Acre to Hectare?
The formula to convert Acre to Hectare is: ha = ac × 0.4046856422. For example, to convert 10 Acre to Hectare, you would multiply 10 by 0.4046856422.
What is a Acre?
The acre is a unit of land area equal to 43,560 square feet or about 4,047 square meters. It is used primarily in the US, UK, and former British colonies.
What is a Hectare?
The hectare equals 10,000 square meters or about 2.471 acres. It is the primary unit for land measurement in most countries.
What are the common uses of Acre?
The Acre is commonly used in land measurement, agriculture, real estate.
Related Area Conversions
Cite this page
UnitConvertLab. (2026). Acre to Hectare converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/acre-to-hectare