Convert Acres to Hectares

Instantly convert acres (ac) to hectares (ha). Enter a value to see the result and the conversion formula.

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How our Acres to Hectares unit converter works

To ensure maximum accuracy when converting Acres to Hectares, our calculator uses a scientific pivot method. Instead of relying on a potentially inaccurate direct conversion, the system first converts ac into the base unit of the International System (the square meter), then recalculates the result into ha. This approach drastically reduces rounding errors.

About this conversion

Global agriculture and environmental policy use the hectare. Converting US/Canadian acres to hectares is standard practice for exports.

When to use this conversion

Used in ecological reporting, forestry management, and by international investors assessing North American farmland.

Formula

Hectares (ha) = Acres (ac) × 0.404686

Tip: You can swap units and convert decimals. Results are rounded for readability.

Examples

Acres (ac) Hectares (ha)
1 ac 0.404686 ha
2 ac 0.809372 ha
5 ac 2.02343 ha
10 ac 4.04686 ha
20 ac 8.09372 ha
50 ac 20.2343 ha
100 ac 40.4686 ha
250 ac 101.1715 ha
500 ac 202.343 ha
1000 ac 404.686 ha

FAQ

How big is a 1-acre residential lot?

A 1-acre lot is about 0.4 hectares (approx 43,560 sq ft), offering significant space for a large home and big yard.

How is commercial farming measured?

A typical North American family farm can be 400 acres, which converts to about 162 hectares.