Square metres to acres

Multiply square metres by 0.000247105 to get acres.

1 m² = 0.000247105 acBIPM SI · NIST HB 44

Convert

m²

1.2355ac

5,000 m² = 1.2355 ac

How to convert square metres to acres

The acre is exactly 43 560 square feet (4046.8564224 m²). The square metre is the SI unit of area, a square one metre on each side.

Worked example — 5,000 m²: 5,000 × 0.000247105 = 1.2355 ac.

Square metres to acres table

Common conversions. The reverse table is on acres to square metres.
Square metres	Acres
500 m²	0.123553 ac
1,000 m²	0.247105 ac
2,000 m²	0.494211 ac
4,047 m²	1 ac
5,000 m²	1.2355 ac
10,000 m²	2.4711 ac
20,000 m²	4.9421 ac
40,469 m²	10.0001 ac
100,000 m²	24.7105 ac

Reverse and related

acres → square metresreverse conversion ft² → m²1 ft² = 0.092903 m² m² → ft²1 m² = 10.7639 ft² ac → ft²1 ac = 43,560 ft² ha → ac1 ha = 2.4711 ac ac → ha1 ac = 0.404686 ha m² → yd²1 m² = 1.196 yd²

About square metres and acres

Square metre (m²)

1 m² = 0.000247105 ac

Definition. The SI unit of area, a square one metre on each side

History and origin

The square metre is the SI unit of area, simply a square one metre on each side. It came with the metre in the metric system of the 1790s.

Current use

Square metres measure floor area and the size of rooms and apartments across the metric world.

Source: BIPM SI Brochure (2019)

Acre (ac)

1 ac = 4,046.8564 m²

Definition. Exactly 43 560 square feet (4046.8564224 m²)

History and origin

The acre began as the area a yoke of oxen could plough in a day, later fixed as 43 560 square feet, or one furlong by one chain. It equals about 4047 square metres.

Current use

Acres are the customary measure for land, farm plots and larger properties in the United States and United Kingdom.

Source: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement

Where people use this

Square metres: floor area, room and apartment sizes. Acres: land and farm plots, US real estate. 4047 m² is about 1 acre.

How we know this is right

The factor is fixed by the standards that define the units, not chosen — so it is exact, not a measurement:

1 ac = 4,046.856422 m², so 1 m² = 1 ÷ 4,046.856422 = 0.000247105 ac.

Every value is carried to full double precision; the display is rounded.

Sources: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement; BIPM SI Brochure (2019).

Questions people ask

How many acres is 1000 m²?

1000 m² is about 0.247 acres. To convert square metres to acres, divide by 4046.86.

How many acres is 5000 m²?

5000 m² is about 1.24 acres, and 4047 m² is about 1 acre.

How many acres is 10,000 m²?

10,000 m² — one hectare — is about 2.47 acres.

All square metre conversions

Square feet to square metres1 ft² = 0.092903 m² Square metres to square feet1 m² = 10.7639 ft² Acres to square metres1 ac = 4,046.8564 m² Square metres to square yards1 m² = 1.196 yd² Hectares to square metres1 ha = 10,000 m² Square metres to square centimetres1 m² = 10,000 cm² Square metres to square kilometres1 m² = 0.000001 km²