square feet to acres calculator
Convert square feet to acres, square yards, and square meters instantly. Enter a lot or property size in square feet and see the acreage.
Property listings, surveys, and site plans mix units constantly — a lot might be quoted in square feet while zoning rules or land records use acres. This calculator converts square feet into acres, square yards, and square meters in one step.
How this calculator works
An acre is defined as exactly 43,560 square feet, so dividing by that constant gives acres directly.
Formula: Acres = square feet ÷ 43,560. Square yards = square feet ÷ 9. Square meters = square feet × 0.092903.
Worked example
A 10,000 square foot lot:
- Acres: 10,000 ÷ 43,560 ≈ 0.2296 acres
- Square yards: 10,000 ÷ 9 ≈ 1,111.1 sq yd
- Square meters: 10,000 × 0.092903 ≈ 929.0 sq m
Reference
| Square feet | Acres |
|---|---|
| 5,000 ft² | 0.1148 acres |
| 10,000 ft² | 0.2296 acres |
| 43,560 ft² | 1.0000 acres |
| 100,000 ft² | 2.2957 acres |
Where this conversion is used
Real estate listings, plat maps, and zoning ordinances routinely quote minimum lot sizes in acres even when the buildable footprint is described in square feet — this conversion lets you check both against each other. Going the other direction, the Acres to Square Feet Calculator starts from acreage instead.
Frequently asked questions
How many square feet are in an acre?
One acre is exactly 43,560 square feet. That number comes from the old surveying definition of an acre as one furlong (660 ft) by one chain (66 ft), and it's still the standard used for land measurement in the US today.
Why do lot sizes get listed in square feet but land in acres?
Square feet is easier to picture for a house lot or small parcel, while acres is the standard unit once a property gets larger — a few acres of land would be an unwieldy number of square feet to read at a glance.
How big is a quarter acre in square feet?
A quarter acre is 43,560 ÷ 4 = 10,890 square feet — a common suburban lot size, roughly 104 ft × 104 ft if square.
Does this work for irregular lot shapes?
Yes — the conversion only needs the total square footage, not the shape. Calculate the area of an irregular lot first (by breaking it into rectangles and triangles, or from a survey), then convert that total here.
What's the difference between square yards and square meters here?
Both are just other units of area, shown for convenience. Square yards matter for sod, carpet, and fabric estimates; square meters matter for metric-based plans or international comparisons.
Estimates only. Verify quantities with your supplier before purchasing.