Square Feet to Acres
Divide square feet by 43,560 and you have acres, because an acre is exactly 43,560 square feet: 10,000 sq ft is 0.229568411387 acres, and 21,780 sq ft is half an acre exactly. The converter above opens with Square foot in the From box and Acre in the To box whatever you converted last, and it prints the answer to twelve significant digits. Under the result the same plot is listed in square metres, hectares, square yards, square miles, square inches, square centimetres and square kilometres at once, which is the part most square feet to acres pages leave out: a lot quoted in acres usually has to be repeated in square metres or hectares an hour later. The swap button between the two boxes turns the page into an acres to square feet converter without reloading it, and the chart at the foot of the page runs from 1,000 square feet to a million.
1 ft² in every area unit
Square feet to acres, square metres and square yards
Every figure is this converter's own output for that number of square feet, printed the way the page prints it. The 5,445, 10,890, 21,780 and 43,560 rows are an eighth, a quarter, a half and a whole acre exactly, which is why they end there.
| Square feet | Acres | Square metres | Square yards |
|---|---|---|---|
| 1,000 | 0.0229568411387 | 92.90304 | 111.111111111 |
| 2,500 | 0.0573921028466 | 232.2576 | 277.777777778 |
| 5,000 | 0.114784205693 | 464.5152 | 555.555555556 |
| 5,445 | 0.125 | 505.8570528 | 605 |
| 7,500 | 0.17217630854 | 696.7728 | 833.333333333 |
| 10,000 | 0.229568411387 | 929.0304 | 1,111.11111111 |
| 10,890 | 0.25 | 1,011.7141056 | 1,210 |
| 15,000 | 0.34435261708 | 1,393.5456 | 1,666.66666667 |
| 20,000 | 0.459136822773 | 1,858.0608 | 2,222.22222222 |
| 21,780 | 0.5 | 2,023.4282112 | 2,420 |
| 25,000 | 0.573921028466 | 2,322.576 | 2,777.77777778 |
| 30,000 | 0.68870523416 | 2,787.0912 | 3,333.33333333 |
| 40,000 | 0.918273645546 | 3,716.1216 | 4,444.44444444 |
| 43,560 | 1 | 4,046.8564224 | 4,840 |
| 50,000 | 1.14784205693 | 4,645.152 | 5,555.55555556 |
| 87,120 | 2 | 8,093.7128448 | 9,680 |
| 100,000 | 2.29568411387 | 9,290.304 | 11,111.1111111 |
| 217,800 | 5 | 20,234.282112 | 24,200 |
| 435,600 | 10 | 40,468.564224 | 48,400 |
| 1,000,000 | 22.9568411387 | 92,903.04 | 111,111.111111 |
Common questions
- How many square feet are in an acre?
- 43,560, exactly. The same acre is 4,840 square yards, 4,046.8564224 square metres and 0.40468564224 hectares, and all four of those figures are on the page at once: type 43,560 in the From box and the headline reads 1 acre with nothing after the decimal point, with the square yard, square metre and hectare rows underneath it.
- How do I convert square feet to acres?
- Divide by 43,560. A 10,000 square foot lot is 0.229568411387 acres, 5,000 square feet is 0.114784205693 acres, and 100 square feet is 0.00229568411387 acres. Going the other way multiplies by the same number, so 0.25 acres is 10,890 square feet. The swap button between the two boxes flips the pair when you want to type acres instead.
- Is an acre exactly 43,560 square feet?
- Yes, because both units are defined in metres. An acre is exactly 4,046.8564224 m² and a square foot is exactly 0.09290304 m², and the first divides by the second exactly 43,560 times. This converter stores those two definitions rather than a rounded ratio, so 43,560 square feet comes back as 1 acre and 87,120 as 2, not as 0.99999.
- How big is a quarter acre in square feet?
- 10,890 square feet. Half an acre is 21,780, an eighth is 5,445 and a tenth is 4,356. To read one here, press the swap button so that acres is the From unit and type 0.25: the headline shows 10,890 square feet, and the rows under it give the same plot as 1,011.7141056 square metres and 1,210 square yards.
- My lot is 150 by 200 feet. How many acres is that?
- Multiply the sides first: 150 times 200 is 30,000 square feet, which this page converts to 0.68870523416 acres. The converter takes an area rather than two sides, so the multiplication is yours to do. The square footage calculator does that step for you, room by room or plot by plot, and shows acres beside the total.
- Why is one square foot shown as 0.0000229568411387 acres?
- Because an acre is a large unit and one square foot is one 43,560th of it. Results are printed to twelve significant digits with trailing zeros dropped, which is why the exact cases stay clean and everyday lot sizes keep their decimals. Areas smaller than about a millionth of the target unit switch to exponential notation instead, so a single square inch reads 1.594225e-7 acres.
- Can I convert acres to hectares on this page?
- Yes. Hectares are one of the units listed under the result, so an acre reads 0.40468564224 hectares, and choosing Hectare in either box makes it the headline instead. Going the other way, one hectare is 2.47105381467 acres. Square millimetres are the only area unit hidden by default, behind the Show 1 more switch in the readout, because nobody measures land in them.
- Is my lot size sent anywhere?
- No. The conversion is one multiplication and one division against a table of unit definitions that ships with the page, so it runs in your browser and keeps working with no network once the page has loaded. The number you last typed is kept on your own device so the page can restore it, and Start over at the top of the page clears it.
Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.