Hectares to Acres Converter
Enter the area in hectares below to convert it to acres.
Convert Hectares to Acres
Enter a value in hectares (ha) to convert to acres (ac).
Hectare to Acre Conversion Table
Table showing various hectare measurements converted to acres. Click any preset value or arrow to load it into the converter.
| Hectares (ha) | Acres (ac) |
|---|---|
| 1 ha | 2.4710538 ac |
| 2 ha | 4.9421076 ac |
| 2.5 ha | 6.1776345 ac |
| 5 ha | 12.3552691 ac |
| 10 ha | 24.7105381 ac |
| 15 ha | 37.0658072 ac |
| 20 ha | 49.4210763 ac |
| 25 ha | 61.7763454 ac |
| 30 ha | 74.1316144 ac |
| 50 ha | 123.5526907 ac |
How to Convert Hectares to Acres
To convert hectares to acres, multiply the area by the following conversion ratio: 2.4710538 acres/hectare.
Since one hectare is equal to 2.4710538 acres, you can use this simple formula to convert:
The area in acres is equal to the area in hectares multiplied by 2.4710538.
For example, here's how to convert 5 hectares to acres using the formula above.
How Many Acres Are in a Hectare?
There are 2.4710538 acres in a hectare, which is why we use this value in the formula above.
Our hectare to acre calculator automatically converts your area measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Hectares and acres are both units used to measure area. Keep reading to learn more about each unit.
What Is a Hectare?
A hectare is a unit of area equal to 10,000 square meters (m²), the base unit for area. Metric land unit equal to 10,000 square meters (approx. 2.471 acres). [1]
The hectare is classified as a metric and SI-compatible unit of area. Hectares can be abbreviated as ha; for example, 1 hectare can be written as 1 ha.
When working with hectares (ha) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, hectares (ha) are widely used across large-scale industrial, bulk, and macro-level area specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is an Acre?
An acre is a unit of area equal to 4,046.8564224 square meters (m²), the base unit for area. Imperial & US Customary land unit equal to 43,560 square feet. [2]
The acre is classified as a US customary and imperial unit of area. Acres can be abbreviated as ac; for example, 1 acre can be written as 1 ac.
When working with acres (ac) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, acres (ac) are widely used across large-scale industrial, bulk, and macro-level area specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting area between hectares (ha) and acres (ac), keep full floating-point precision (1 ha = 2.4710538 ac; 1 ac = 0.4046856 ha) during intermediate calculations and round only the final acre figure to match your instrument tolerance.
More Hectare & Acre Conversions
Need to calculate in the opposite direction? Use our acres to hectares converter (ac to ha) to switch your starting unit immediately. You can also explore related tools such as converting square miles to acres, converting square feet to acres, or converting hectares to square meters.
Convert from Hectares
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length & Area)·Area Metrology Standard — Hectares (ha) to Acres (ac)
- [2]NIST HB 44 SpecificationNIST HB 44 (Acre, Hectare & Land Survey Tables)·Unit Specifications: Hectare (ha) & Acre (ac)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (Area))·Conversion Factors & Mathematical Basis (ha to ac)