Hectares to Acres

Hectares (ha) to acres (ac).

Value

Convert to

12.3553ac

Precision (significant figures)

Formula

ac = ha × 2.47105

1 ha = 2.47105 ac

acres = ha × 2.47105. A hectare is a 100 × 100 m square (10,000 m²), about 2.47 acres. So 5 ha is 12.3553 acres and 100 ha, one square kilometer, is 247.105 acres.

Formula

Worked example

Start with 5 ha.
Multiply by 2.47105 (ac per ha): 5 × 2.47105 = 12.3553 ac.

Hectares to acres chart

Hectares (ha)	Acres (ac)
0.1	0.247105
0.25	0.617763
0.5	1.23553
1	2.47105
2	4.94211
3	7.41316
5	12.3553
10	24.7105
20	49.4211
25	61.7763
50	123.553
100	247.105
200	494.211
400	988.422
1,000	2,471.05
10,000	24,710.5

When you need this conversion

Reading international land and farm listings, crop yields per hectare, forestry reports and environmental data when you think in acres.

Quick reference

1 ha = 2.47105 ac
2 ha = 4.94211 ac
5 ha = 12.3553 ac
10 ha = 24.7105 ac
100 ha = 247.105 ac

Yields

Crop yields convert the other way. A yield per hectare is larger than the same yield per acre: 8 tonnes per hectare is 3.24 tonnes per acre (8 ÷ 2.47105).

Common mistakes

Multiplying yields by 2.47. Per-hectare figures are divided by 2.47 to get per-acre figures, not multiplied.

Treating hectares as square kilometers. 1 km² is 100 ha.

For the reverse, use acres to hectares.

Questions

How many acres is 1 hectare?

2.47105 acres.

How many acres is 10 hectares?

24.7105 acres.

How big is a hectare?

100 m × 100 m. A rugby or soccer pitch is about 0.7 ha.

How many hectares in a square kilometer?

100.

Sources

Last reviewed 2026-09-24. How we check values · Report a problem with this page