Acres to square meters

1 acre = 4,046.86 square meters

Type a value in acres (ac) to get square meters (m²) straight away. An acre is larger than a square meter, so the number goes up. Both units belong to area, measured here against the square meter.

FromTo4,046.8564

1 ac = 4,046.8564 m²

Formula

m² = ac × 4,046.8564

One acre is 4,046.8564 square meters, so multiply the acre value by that factor. Here ac is the value in acres and m² is the result in square meters.

Worked example: 2 acres × 4,046.8564 = 8,093.71 square meters.

Acres to square meters table

acres (ac)	square meters (m²)
1 ac	4,046.86 m²
2 ac	8,093.71 m²
3 ac	12,140.6 m²
4 ac	16,187.4 m²
5 ac	20,234.3 m²
6 ac	24,281.1 m²
7 ac	28,328 m²
8 ac	32,374.9 m²
9 ac	36,421.7 m²
10 ac	40,468.6 m²
15 ac	60,702.8 m²
20 ac	80,937.1 m²
25 ac	101,171 m²
30 ac	121,406 m²
40 ac	161,874 m²
50 ac	202,343 m²
60 ac	242,811 m²
75 ac	303,514 m²
100 ac	404,686 m²

Everyday acres in square meters

What it is	ac	m²
a quarter-acre house lot	0.25 ac	1,011.71 m²
one acre	1 ac	4,046.86 m²
a small farm field	2.5 ac	10,117.1 m²
a smallholding	5 ac	20,234.3 m²
one square mile	640 ac	2,589,990 m²

Quick estimate in your head

Multiply by about 4,000. For 2 ac that gives 8,000 m² against an exact 8,093.71 m², an error of 1.2%.

About the units

Acre (ac). 43,560 square feet or about 4,047 m². Used for farmland and estates in India, the US and UK.

Square meter (m²). A square 1 m on each side. The SI unit of area, used for flats outside the US and India.

Going the other way, 1 square meter is 0.000247105 acres.

Questions

How many square meters are in 1 acre?

1 acre is 4,046.86 square meters, and 1 square meter is 0.000247105 acres.

How do I convert acres to square meters?

Use m² = ac × 4,046.8564. For example, 2 acres × 4,046.8564 = 8,093.71 square meters.

Is the acre to square meter factor exact?

Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.

How much is one square mile in square meters?

640 ac is 2,589,990 m².

Source for the conversion factor: NIST Handbook 44, Appendix C (units of area).

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