Hectares to Acres Converter

How it is calculated

Enter an area in hectares (ha). The tool multiplies it by a fixed factor to get acres and by 10,000 to get square metres:

acres = ha × 2.4710538

m² = ha × 10 000

Acres are shown with four decimals and square metres as a whole number with thousands separators. The factor is applied as written, so the acre result is a rounded display of a longer number. To go the other way, divide by the same factor: one acre is about 0.4047 ha. The tool does not block negative numbers; it just returns a negative area, which has no physical meaning. Only the international acre is used, not regional historical acres or the survey acre.

Common mistakes

• Typing a decimal comma such as 2,5. The field expects a decimal point (2.5); a comma-formatted number gives no result.
• Mixing up hectares with acres and multiplying when you should divide. One hectare is larger than two acres, so the acre figure is always about 2.5 times the hectare figure.
• Confusing hectares with square kilometres. 1 km² is 100 ha, so 3 km² must be entered as 300 ha.
• Reading the square metre line as acres or the reverse because both appear together. Check the unit suffix, ac or m², before copying a figure into a document.
• Rounding the result by hand and converting back. 6.18 acres converts back to about 2.501 ha, so keep the four decimals when precision matters, for example in a land deed.