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Hectares to Acres Converter

Convert hectares (ha) to acres (ac), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
2.47105381467 ac
square miles
0.00386102158542 sq mi
square yards
11,959.900463 sq yd
square feet
107,639.104167 sq ft
square inches
15,500,031.0001 sq in
square kilometers
0.01 km²
ares
100 a
square meters
10,000 m²
square centimeters
100,000,000 cm²
square millimeters
10,000,000,000 mm²
square micrometers
1 × 10¹⁶ µm²

1 ha = 2.47105381467 ac

Show the working
  1. 1 ha = 2.47105381467 ac
  2. 1 × 2.47105381467 = 2.47105381467 ac

How to convert hectares to acres

1 ha = 2.47105381467 ac, so multiply by 2.47105381467 to go from hectares to acres. Going the other way, 1 ac = 0.40468564224 ha.

ac = ha × 2.47105381467
ha = ac × 0.40468564224

Worked example:

1 ha = 2.47105381467 ac
5 × 2.47105381467 = 12.3552690734 ac

Hectares to acres table

HectaresAcres
1 ha2.47105381467 ac
2 ha4.94210762934 ac
3 ha7.41316144401 ac
4 ha9.88421525869 ac
5 ha12.3552690734 ac
6 ha14.826322888 ac
7 ha17.2973767027 ac
8 ha19.7684305174 ac
9 ha22.239484332 ac
10 ha24.7105381467 ac
15 ha37.0658072201 ac
20 ha49.4210762934 ac
25 ha61.7763453668 ac
30 ha74.1316144401 ac
40 ha98.8421525869 ac
50 ha123.552690734 ac
75 ha185.3290361 ac
100 ha247.105381467 ac
250 ha617.763453668 ac
500 ha1,235.52690734 ac
1000 ha2,471.05381467 ac

About the units

Hectares (ha)
Hectares, a metric unit. Definition: BIPM SI Brochure (non-SI unit accepted for use with the SI).

Formula version 0.1.0Reviewed