Acres to Hectares Converter

One acre equals 0.40468564 hectares (ha). To convert acres to hectares, multiply by 0.40468564; to go back the other way, multiply by 2.4710538 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What acres and hectares actually measure

Acre (ac) — An acre is 43,560 square feet, about 0.405 hectares — historically the area a team of oxen could plough in a day. Land in the US, UK and much of the Commonwealth.

Hectare (ha) — A hectare is 10,000 square metres — a square 100 m on each side. Farmland and land planning in most countries.

Acres to Hectares conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert acres to hectares by hand

Multiply the number of acres by 0.40468564.

For example, 25 ac × 0.40468564 = 10.117141 ha.

Going the other way, divide by 0.40468564 — or multiply by 2.4710538, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.