Acres to Hectares Converter
Convert acres ↔ hectares both ways with the exact international factor — 1 acre = 0.40468564224 ha. Free, instant, and 100% private (everything runs in your browser).
Heads up: you entered a negative area. The math still converts linearly, but land areas are normally zero or positive.
Quick conversion table
| Acres | Hectares |
|---|
hectares = acres × 0.40468564224acres = hectares ÷ 0.40468564224 (= hectares × 2.4710538146717)Why exact? 1 acre = 4046.8564224 m² (international definition, 1959) and 1 ha = 10,000 m².
What this tool is (and isn't)
This tool is a pure unit converter: it converts an area you already know between acres and hectares (plus sq ft, sq m, sq km).
Not an acreage calculator: it does not measure land from dimensions. If you need to compute acreage from a lot's length × width first, that is the job of an acreage calculator.
Not a general square calculator: a square calculator covers square footage plus squaring numbers (x²); this tool is a dedicated acres ↔ hectares converter.
Frequently asked questions
How many hectares are in 1 acre?
Exactly 0.40468564224 hectares. This is not an approximation: 1 acre is defined as exactly 4046.8564224 square meters and 1 hectare is exactly 10,000 square meters, so 4046.8564224 / 10000 = 0.40468564224.
How many acres are in 1 hectare?
One hectare equals approximately 2.4710538147 acres (the reciprocal of 0.40468564224). So a 10-hectare field is about 24.71 acres.
What is the formula to convert acres to hectares?
hectares = acres × 0.40468564224. To go the other way: acres = hectares ÷ 0.40468564224, which is the same as acres = hectares × 2.4710538146717.
How many hectares is 10 acres?
10 acres = 4.0468564224 hectares. Multiply 10 by the exact factor 0.40468564224.
How many hectares is 100 acres?
100 acres = 40.468564224 hectares. A 100-acre farm is just over 40.47 hectares.
Is the acre-to-hectare factor exact or rounded?
It is exact. The international yard and pound agreement of 1959 defines the acre as exactly 4046.8564224 square meters. Since a hectare is exactly 10,000 square meters, the conversion factor 0.40468564224 terminates and has no rounding error.
How many square feet are in an acre, and in a hectare?
One acre is exactly 43,560 square feet. One hectare is exactly 10,000 square meters, which equals about 107,639.104 square feet.
Why do land listings switch between acres and hectares?
Acres are the customary land unit in the United States, United Kingdom and several Commonwealth countries, while hectares are the metric standard used in most of the rest of the world. International buyers, investors and developers convert between the two to compare parcels across markets.
Does this tool work offline?
Yes. The converter is 100% client-side: all calculations happen in your browser with plain JavaScript and no data is sent anywhere. It keeps working with no internet connection once the page is loaded.
What is the difference between this converter and an acreage calculator?
This tool converts an area you already know between acres and hectares. An acreage calculator computes the area from land dimensions (length × width of a lot). If you need to measure a parcel from its dimensions first, use an acreage calculator, then convert the result here.
Can I convert decimals and large acreages, like 2.5 or 10,000 acres?
Yes. The converter accepts decimals and large values. For example, 2.5 acres = 1.0117141056 hectares, and 10,000 acres = 4,046.8564224 hectares.
Which is bigger, an acre or a hectare?
A hectare is bigger. One hectare equals about 2.47 acres, so you need roughly two and a half acres to make one hectare.
Free tool by NRTechStudio