From

ac

To

Square feet435,600 ft²
Square meters40,468.56 m²
Square yards48,400 yd²
Square inches62,726,400 in²

Precision

Factor 1 ac = 0.40468564224 ha · exact

Show this area in every unit

Same area in other units
Square centimeters (cm²)	404,685,642.2
Square meters (m²)	40,468.56422
Hectares (ha)	4.046856422
Square kilometers (km²)	0.04046856422
Square inches (in²)	62,726,400
Square feet (ft²)	435,600
Square yards (yd²)	48,400
Acres (ac)	10
Square miles (mi²)	0.015625

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Floor plan to scale · your area as a square

Your area is drawn as a square. The solid grid counts the unit you entered and the dashed grid the unit you converted to; when a single unit square would be too small to see, each grid square groups several (the legend says how many). The dashed outline is a familiar space at the same scale.

How to convert acres to hectares

1 acre = 4,046.8564224 m² (exact)

1 hectare = 10,000 m²

hectares = acres × 0.40468564224

Shortcut: Multiply by 0.4: 10 acres ≈ 4 ha (exactly 4.047). In reverse, 1 ha ≈ 2.5 acres.

Acres to hectares table

Acres to hectares conversion table
Acres	Hectares
0.25 ac	0.1012 ha
0.5 ac	0.2023 ha
1 ac	0.4047 ha
2 ac	0.8094 ha
2.5 ac	1.0117 ha
5 ac	2.0234 ha
10 ac	4.0469 ha
20 ac	8.0937 ha
40 ac	16.1874 ha
50 ac	20.2343 ha
80 ac	32.3749 ha
100 ac	40.4686 ha
160 ac	64.7497 ha
320 ac	129.4994 ha
640 ac	258.9988 ha
1,000 ac	404.6856 ha

Values are calculated with exact factors and rounded for the table; the converter above shows full precision.

Worked examples

1 ac to hectares

1 ÷ 2.471053815

0.4047 ha

10 ac to hectares

10 ÷ 2.471053815

4.0469 ha

160 ac to hectares

160 ÷ 2.471053815

64.7497 ha

Questions

How many hectares is 1 acre?

About 0.4047 hectares.

How many acres is 1 hectare?

About 2.471 acres.

How many hectares is a square mile?

A square mile is 640 acres, about 259 hectares.

Related conversions

Square meters to square feet
Square feet to square meters
Area converter: every area unit, with the full drawing

The history: Acres and hectares: measuring land through history.

Acres to hectares converter