Acres to Hectares converter

How to convert acres to hectares

To convert acres to hectares, use ha = ac × 0.404686. For example, 50 ac is 20.2343 ha. Type any value in the converter above and the result updates instantly.

The Acres to Hectares formula

The conversion is ha = ac × 0.404686. One acre equals 0.404686 ha. This conversion is exact: acre is defined precisely in terms of hectare, so the only rounding is in the digits shown.

Acres to Hectares conversion table

Where acres and hectares are used

Acres measure land area in the United States and the United Kingdom, mainly for farms and large plots.

Hectares measure land area in most countries: 1 hectare is 10,000 square meters.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 0.5 ac = 0.202343 ha
• 2 ac = 0.809371 ha
• 10 ac = 4.04686 ha

Converting acres to hectares in your head

As a quick estimate, multiply by 0.4 (rounded).

Hectares to Acres reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Square units are not the same as length units: 1 m² is about 10.76 ft², not 3.28 ft².
• Real estate listings may use gross or net areas; the conversion is exact but the measured area may differ.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the Hectares to Acres converter.