Square Meters to Acres Converter
Convert square meters to acres — 4,046.86 m² to the acre. Results update as you type; exact factors shown.
One square meter is 0.0002 acres — see the exact factor, not a rounded rule of thumb.
How the square meters to acres converter works
Areas convert through the square meter. Because the inch is exactly 25.4 mm, a square foot is exactly 0.09290304 m², an acre (43,560 square feet) is exactly 4,046.8564224 m² and a square mile (640 acres) is 2,589,988.110336 m². A hectare is 10,000 m² by definition.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common area conversions
| From | To | Units |
|---|---|---|
| 500 m² | 0.1236 ac | square meters to acres |
| 1,000 m² | 0.2471 ac | square meters to acres |
| 2,000 m² | 0.4942 ac | square meters to acres |
| 4,046.86 m² | 1 ac | square meters to acres |
| 5,000 m² | 1.2355 ac | square meters to acres |
| 10,000 m² | 2.4711 ac | square meters to acres |
| 20,000 m² | 4.9421 ac | square meters to acres |
| 40,000 m² | 9.8842 ac | square meters to acres |
| 50,000 m² | 12.3553 ac | square meters to acres |
| 100,000 m² | 24.7105 ac | square meters to acres |
| 500,000 m² | 123.5527 ac | square meters to acres |
| 1,000,000 m² | 247.1054 ac | square meters to acres |
Units in this converter and their exact factors
| Unit | Symbol | One unit in square meters |
|---|---|---|
| square millimeter | mm² | 0.000001 square meter |
| square centimeter | cm² | 0.0001 square meter |
| square meter | m² | 1 square meter |
| hectare | ha | 10,000 square meter |
| square kilometer | km² | 1,000,000 square meter |
| square inch | in² | 0.00064516 square meter |
| square foot | ft² | 0.09290304 square meter |
| square yard | yd² | 0.83612736 square meter |
| acre | ac | 4,046.8564224 square meter |
| square mile | mi² | 2,589,988.110336 square meter |
FAQFrequently asked questions about area conversion
How many m² in an acre?
4,046.86.
What is 10,000 m² in acres?
2.471 acres — one hectare.
How big is a typical suburban block?
Often 400 to 800 m², which is a tenth to a fifth of an acre.
Which do land titles use?
Hectares and square meters in metric countries; acres persist in the US and in UK rural land.
How do I picture an acre?
About 60% of a football pitch.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.