Acreage Calculator
Enter a value in any of the four units and get all four conversions at once, plus a reference table of common lot sizes.
Square feet
43,560
Acres
1.0000
Square meters
4,047
Hectares
0.4047
Common lot sizes
| Lot | Sq ft | Acres | Sq m |
|---|---|---|---|
| Quarter acre | 10,890 | 0.25 | 1012 |
| Third acre | 14,520 | 0.33 | 1349 |
| Half acre | 21,780 | 0.50 | 2023 |
| 1 acre | 43,560 | 1.00 | 4047 |
| 2 acres | 87,120 | 2.00 | 8094 |
| 5 acres | 217,800 | 5.00 | 20234 |
| 1 hectare | 107,639 | 2.47 | 10000 |
At the default (43,560 sq ft) that's exactly 1 acre, about 4,047 sq m, and about 0.4047 hectares.
How it's calculated
Square feet, acres, square meters, and hectares are all exact, defined conversions -- not estimates -- so every figure here reconciles to the others precisely (1 acre = 43,560 sq ft exactly; 1 sq m = 0.09290304 sq ft exactly; 1 hectare = 10,000 sq m exactly).
Keep going
- Measuring a yard or lot by hand first? The square footage calculator handles irregular shapes before you convert the total to acres. Square Footage Calculator
- Need just the square feet-to-square meters figure without acres or hectares involved, this converter is the more direct tool. Square Feet to Square Meters Converter
Frequently Asked Questions
How big is an acre in real terms?
An acre is 43,560 sq ft -- roughly the size of an American football field without the end zones, or about 209 ft x 209 ft if it were a perfect square (most real lots aren't square, so this is just a feel-for-scale figure).
Do I need square feet or square meters?
The US, UK, and a handful of other countries commonly measure residential land and floor area in square feet; most of the rest of the world uses square meters (or hectares for larger land parcels). Use whichever your local listings, deed, or survey document uses.
What's a hectare?
A hectare is exactly 10,000 sq m -- about 2.47 acres. It's the standard unit for larger land parcels (farms, rural property, many countries' agricultural and forestry data) outside the US.
What's a typical suburban lot size in the US?
It varies enormously by market, but a quarter acre (10,890 sq ft) is a commonly cited typical suburban single-family lot size; dense urban lots can be well under that, and rural lots run into multiple acres.
How do I measure an irregular lot?
Split it into simple shapes the same way you would a room -- the square footage calculator above handles rectangles, triangles, trapezoids, circles, and L-shapes -- then convert the total square footage here into acres, hectares, or square meters.