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Acre to Square Meter Converter

Instant, two-way conversion across common engineering units.

Free

1 ac = 4,046.8564 m²(Acre → Square metre)

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Converting acres to square meters

To convert acres to square meters, multiply the value by 4,046.8564. Area figures drive floor space schedules, finish quantities and cost per area, so both metric and imperial results are shown at full precision.

Visual scale

To scale
1 acre = 4,046.8564 square meters.≈ 4.047K square meters
1 square meter = 0.00024710538 acres.≈ 247 millionths of an acre

Acre (ac)

The acre is the traditional English land unit, equal to 43,560 square feet.

Origin
Originally the area a yoke of oxen could plough in a day, later fixed by statute and now defined from the international yard.
Where it is used
Used for land parcels, development sites and agricultural holdings in the US and UK.
Relation to SI
1 acre = 4,046.8564224 m², about 0.4047 ha.

Square Meter (m²)

The square meter (m²) is the SI derived unit of area and the standard measure of building floor space.

Origin
Defined as the area of a square with sides of one meter.
Where it is used
Used for gross and net floor areas, facade and finish quantities, cost per area and planning submissions.
Relation to SI
The square meter is the SI derived area unit that anchors this category.

Frequently asked questions

How many square meters are in one acre?

1 ac equals 4,046.8564 m².

How do I convert acres to square meters?

Multiply the value by 4,046.8564. For example, 10 ac equals 40,468.564 m².

How do I convert back from square meters to acres?

1 m² equals 0.00024710538 ac. The converter above works in both directions, so you can type into either field.

When should I use hectares instead of acres?

Hectares are the metric standard for site and land areas in most planning systems, while acres remain common in US and UK land records. Use whichever the local authority requires and quote the other in brackets.

How do I convert a length ratio into an area ratio?

Square the length factor. Because 1 ft = 0.3048 m, one square foot is 0.3048², which is 0.09290304 m².

Is this area converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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