Acre (ac)
The acre is used for land in the United States, the United Kingdom, and other countries using imperial measures.
History: the acre comes from medieval land measurement and remains common in countries using imperial units.
Quickly convert acres to hectares without lookup tables or manual math.
This page is focused on converting acres to hectares. Type a number into the first field and the result appears immediately in the second field.
Example: 1 ac = 0.4046856422 ha. Conversion formula: result = value × 4046.8564224 / 10000.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The acre is used for land in the United States, the United Kingdom, and other countries using imperial measures.
History: the acre comes from medieval land measurement and remains common in countries using imperial units.
The hectare equals 10,000 square meters and is most common for land, farming, and cadastral records.
History: the hectare spread with the metric system as a practical land unit equal to 10,000 square meters.
Enter a value in the Acre field. The converter applies the formula "result = value × 4046.8564224 / 10000" and immediately shows the result in hectares.
1 ac = 0.4046856422 ha.
Yes. Use the swap button or choose the reverse pair from the full conversion list.