Convert Acres to Square meters (m²)
Convert acres to square meters (m²) accurately, with the exact formula, worked examples, and a guide to reading overseas land and farm areas.
- Square Centimeter (cm²)40,468,560
- Square Meter (m²)4,046.856
- Square Kilometer (km²)0.004047
- Pyeong1,224.174
- Hectare (ha)0.404686
- Acre (acre)1
- Square Foot (ft²)43,560
🔒 Unit conversions are computed in your browser.
The formula for acres to square meters
One acre is exactly 4,046.856 m², so you multiply acres by 4,046.856 to get square meters. For example, 1 acre is about 4,046.9 m², 2 acres is about 8,093.7 m², and half an acre is about 2,023.4 m². The acre originally described the land a pair of oxen could plow in a day, and it's also defined as 43,560 ft² or 4,840 square yards. In Korean pyeong it comes to 4046.856 ÷ 3.305785 ≈ 1,224 pyeong, a handy fact to keep alongside the metric value.
When you actually need this
US, Australian, and UK listings quote house lots, farmland, and ranches in acres, so this is the go-to conversion for overseas land. A typical American suburban lot is about 0.25 acre, which is roughly 1,012 m² (about 306 pyeong) — a generous yard by Korean standards. When looking into a rural home or farm abroad, converting a '5 acre lot' to about 20,234 m² makes the scale click immediately. It also matters when golf courses, parks, or solar sites are described in acres and you need m² to compare with Korean data. A US football field, at about 1.32 acres, is a useful mental yardstick.
Reference points and a common pitfall
Three anchors cover most cases: 1 acre = 4,046.856 m² ≈ 4,047 m², 1 hectare = 2.471 acres, and 1 acre ≈ 1,224 pyeong. Knowing that a FIFA-standard soccer pitch (about 7,140 m²) is roughly 1.76 acres also helps calibrate size. One caveat: the US uses both the international acre and the slightly larger US survey acre, but they differ by only about 4 parts per million, so 4,046.856 m² is fine for everyday use. And remember an acre is an area, not a side length — don't mistake it for a square and enter the length of one edge.
Frequently asked questions
How many square meters is 1 acre?
One acre is exactly 4,046.856 m², usually rounded to about 4,047 m². That's roughly 1,224 pyeong.
How big is a 0.25-acre lot in square meters?
0.25 acre is 4,046.856 × 0.25 = about 1,011.7 m², or roughly 306 pyeong — a common size for a US suburban house lot.
What's the difference between an acre and a hectare?
A hectare is 10,000 m² and an acre is 4,046.856 m², so one hectare is about 2.471 acres. A hectare is roughly 2.5 times larger than an acre.