How do I convert Acres to Square Metres?

To convert Acres (ac) to Square Metres (m²), use the formula: 1 ac = 4046.856422 m². For example, 1 ac equals 4046.86 m².

How many m² are in one ac?

There are 4046.86 square metres in one acres (1 ac = 4046.86 m²).

What is the conversion formula for ac to m²?

The exact conversion formula is: 1 ac = 4046.856422 m². This converter uses this formula to give you an accurate result for any value you enter.

How many square metres are in an acre?

One acre is exactly 4046.856422 square metres, which is the area of a square roughly 63.6 metres on each side.

How do I convert square metres back to acres?

Divide the number of square metres by 4046.856422. This converter is bidirectional, so you can also type into the Square Metres field to get acres.

Acres to Square Metres Converter

The acre is a traditional imperial unit of land area used mainly in the United States and the United Kingdom, while the square metre (m²) is the metric SI unit used worldwide. Converting between them is essential for real estate, farming, construction and survey work that mixes imperial plot sizes with metric plans. This free converter does it instantly and in both directions.

How it works

The conversion uses the exact internationally defined factor:

1 acre = 4046.856422 square metres

To convert acres to square metres, multiply the number of acres by 4046.856422. To convert back, divide square metres by 4046.856422. Type a value into either field and the other updates in real time.

Example

Convert a 10-acre parcel to square metres:

10 × 4046.856422 = 40,468.56 m²

That is a little over four hectares of land.

Acres (ac)	Square Metres (m²)
1 ac	4046.86 m²
10 ac	40468.56 m²
100 ac	404685.64 m²
1000 ac	4046856.42 m²

All calculations run entirely in your browser — no data is sent to any server.