Hectare to Acre Calculator
Enter an area in hectares and instantly see it in acres, square meters, square feet, and square kilometers — built for land surveys, farm sizing, and international real estate comparisons.
Convert Hectares to Acres
Enter a value in either field — the other updates instantly.
2.4711 ac
Why Convert Hectares to Acres?
The hectare is the metric standard for land area, used across most of the world for farms, forests, and national land statistics. The acre is a customary unit still widely used in the US, UK, and several Commonwealth countries for describing farmland, plots, and residential lots. Whenever land measured in hectares needs to be compared against a US or UK-style listing, an agricultural report, or a legal land description in acres, this conversion bridges the gap.
One hectare equals exactly 2.4710538147 acres, because a hectare is defined as exactly 10,000 square meters and an acre has a fixed exact relationship to the square meter through the international foot. Since this relationship is derived from fixed international standards rather than an approximation, the conversion is always exact and never depends on region.
The Hectare to Acre Formula
Converting hectares to acres is a single multiplication, since both units are fixed relative to each other by international definition.
Hectares → Acres
ac = ha × 2.47105
Multiply the number of hectares by 2.47105 to get the equivalent area in acres.
Example: 8 ha × 2.47105 = 19.77 ac
Acres → Hectares
ha = ac × 0.404686
Multiply the number of acres by 0.404686 (or divide by 2.47105) to get the equivalent area in hectares.
Example: 50 ac × 0.404686 = 20.23 ha
Hectare to Acre Conversion Table
A ready reference for common land measurements, from half a hectare up to 100 hectares.
| Hectares | Acres | Square Meters | Square Feet |
|---|---|---|---|
| 0.5 ha | 1.2355 ac | 5,000 m² | 53,819.55 ft² |
| 1 ha | 2.4711 ac | 10,000 m² | 107,639.10 ft² |
| 2 ha | 4.9421 ac | 20,000 m² | 215,278.21 ft² |
| 5 ha | 12.3553 ac | 50,000 m² | 538,195.52 ft² |
| 10 ha | 24.7105 ac | 100,000 m² | 1,076,391.04 ft² |
| 50 ha | 123.5527 ac | 500,000 m² | 5,381,955.21 ft² |
| 100 ha | 247.1054 ac | 1,000,000 m² | 10,763,910.41 ft² |
| 0.404686 ha (1 ac) | 1.0000 ac | 4,046.86 m² | 43,560 ft² |
For a value not listed here, the calculator at the top of this page computes the exact figure instantly, including fractional areas like 3.25.
Worked Examples: Step by Step
Example 1: Convert 6 hectares (a mid-sized farm plot) to acres
- Formula: ac = ha × 2.47105
- 6 × 2.47105 = 14.83
- Answer: 6 ha ≈ 14.83 ac
Example 2: Convert 40 acres (a US farm listing) to hectares
- Formula: ha = ac × 0.404686
- 40 × 0.404686 = 16.19
- Answer: 40 ac ≈ 16.19 ha
Example 3: A 25 hectare vineyard — how many acres, and how does it compare to a 60 acre US vineyard?
- Acres: 25 × 2.47105 = 61.78 ac
- Comparison: 61.78 ac is larger than 60 ac
- Answer: The 25 hectare vineyard is about 1.78 acres larger than the 60 acre US vineyard
Where This Conversion Comes Up
Farm and Land Sales
International land listings are usually given in hectares, while US and UK buyers think in acres — this conversion helps both sides judge size and value consistently.
Agriculture and Crop Yield Reporting
Global agronomy reports quote yield per hectare, while US farm planning often uses acres, making this conversion routine when comparing productivity across regions.
Forestry and Conservation
Forest cover, reforestation targets, and protected land area are typically tracked in hectares internationally, needing conversion to acres for US-based land management reports.
Real Estate Development
Developers evaluating a metric-zoned site against acre-based US zoning and lot-size requirements need to convert hectares to acres to compare against local codes.
Renewable Energy Siting
Utility-scale solar and wind farm proposals often specify site area in hectares internationally, while US permitting documents commonly reference acreage.
Common Mistakes When Converting
- Confusing hectares with acres. 1 hectare ≈ 2.47 acres, not 1 acre — treating the two as roughly equal understates the true area by more than half.
- Mixing up multiply and divide. Hectares to acres is always a multiplication by a number greater than 2 (× 2.47105); acres to hectares is always a multiplication by a number less than 1 (× 0.404686) — mixing the two up produces wildly wrong results.
- Forgetting a hectare is exactly 10,000 square meters. Starting from an approximate square meter figure instead of the exact 10,000 m² definition can introduce unnecessary error before the acre conversion is even applied.
- Rounding 2.47105 too early in multi-step calculations. For large tracts of land, rounding the conversion factor too early can introduce a noticeable error by the time the final acreage figure is calculated.
Cheat Sheet: Common Round Numbers
| Unit | Value |
|---|---|
| 1 ha | 2.47105 ac |
| 1 ac | 0.404686 ha |
| 1 ha | 10,000 m² |
| 1 ha | 0.01 km² |
| 1 ha | 107,639.10 ft² |
Frequently Asked Questions
How many acres is 1 hectare?
1 hectare equals 2.47105 acres.
How do I convert hectares to acres?
Multiply the number of hectares by 2.47105. For example, 3.5 ha × 2.47105 = 8.65 ac.
Is the hectare to acre conversion exact or approximate?
It's exact. A hectare is defined as exactly 10,000 square meters, and an acre is defined as exactly 4,046.8564 square meters, so dividing those fixed values gives an exact hectare-to-acre factor with no rounding involved beyond the displayed decimal places.
What is 15 hectares in acres?
15 hectares equals approximately 37.07 acres.
How do I convert acres back to hectares?
Multiply the number of acres by 0.404686. For example, 100 ac × 0.404686 = 40.47 ha.
Why is a hectare bigger than an acre?
A hectare is defined as 10,000 square meters, which works out to roughly 2.47 times the area of an acre (4,046.8564 square meters), so a hectare is the larger of the two units.
Does this calculator work in reverse, from acres to hectares?
Yes. Enter a value into the Acres field and the Hectares field updates automatically — the swap button lets you jump straight to entering acres instead.