Acres to Hectares
Convert acres to hectares with the international foot. One acre is 4046.8564224 m². One hectare is 10000 m². So 1 ac = 0.40468564224 ha. This is not a cadastral survey.
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How to convert acres to hectares
- Enter the area in acres. The default is 1.
- Keep From as Acres and To as Hectares, or pick square meters or square feet.
- Read hectares. Multiply acres by 0.40468564224.
- Swap units to convert hectares back to acres. Square feet to square meters is a sibling spoke.
International acre
Area (square meter)
| Acre | 1 ac = 4046.8564224 m² (international foot) |
|---|---|
| Hectare | 1 ha = 10000 m² = 0.01 km² |
| Ratio | 1 ac = 0.40468564224 ha |
| Square foot | 1 ft² = 0.09290304 m² |
| Square mile | 640 ac in the international mile |
| Survey foot | Not used. GIS survey acres differ slightly |
What acres to hectares does
This spoke starts at acres and targets hectares. The engine stores square meters. An acre here is 4046.8564224 m², built from the international foot (0.3048 m) as 10 square chains. A hectare is 10000 m² by SI prefix (a square 100 m on a side). Divide those: 4046.8564224 / 10000 = 0.40468564224 ha per acre.
Floor area in square feet is square feet to square meters. The hub is area.
Acre and hectare factors
ha = ac × 0.40468564224. ac = ha / 0.40468564224. m² = ac × 4046.8564224. km² = ha / 100. Swap exchanges From and To. Do not treat 2.47 acres as exact for 1 ha; the exact reciprocal of 0.40468564224 is about 2.4710538147 ac/ha.
International acre versus survey acre
The US survey foot (1200/3937 m) made a slightly different acre. This page uses 0.3048 m per foot, the same choice as square feet to square meters. Title work and older GIS layers may still use the survey acre. This converter is not a plat or a legal description.
When to convert acres to hectares here
Move a farm listing from acres into hectares, compare a 10 ac parcel with ha, or drop to square meters. Leave length times width on a square-footage calculator.
What this page does not do
It does not multiply length by width. It does not convert the survey foot. It is not a cadastral or title tool. Input stays in this tab.