Acres to square feet

1 acre = 43,560 square feet

Type a value in acres (ac) to get square feet (sq ft) straight away. An acre is larger than a square foot, so the number goes up. Both units belong to area, measured here against the square meter.

FromTo43,560

1 ac = 43,560 sq ft

Formula

sq ft = ac × 43,560

One acre is 43,560 square feet, so multiply the acre value by that factor. Here ac is the value in acres and sq ft is the result in square feet.

Worked example: 2 acres × 43,560 = 87,120 square feet.

Acres to square feet table

acres (ac)	square feet (sq ft)
1 ac	43,560 sq ft
2 ac	87,120 sq ft
3 ac	130,680 sq ft
4 ac	174,240 sq ft
5 ac	217,800 sq ft
6 ac	261,360 sq ft
7 ac	304,920 sq ft
8 ac	348,480 sq ft
9 ac	392,040 sq ft
10 ac	435,600 sq ft
15 ac	653,400 sq ft
20 ac	871,200 sq ft
25 ac	1,089,000 sq ft
30 ac	1,306,800 sq ft
40 ac	1,742,400 sq ft
50 ac	2,178,000 sq ft
60 ac	2,613,600 sq ft
75 ac	3,267,000 sq ft
100 ac	4,356,000 sq ft

Everyday acres in square feet

What it is	ac	sq ft
a quarter-acre house lot	0.25 ac	10,890 sq ft
one acre	1 ac	43,560 sq ft
a small farm field	2.5 ac	108,900 sq ft
a smallholding	5 ac	217,800 sq ft
one square mile	640 ac	27,878,400 sq ft

Quick estimate in your head

Multiply by about 44,000. For 2 ac that gives 88,000 sq ft against an exact 87,120 sq ft, an error of 1.0%.

About the units

Acre (ac). 43,560 square feet or about 4,047 m². Used for farmland and estates in India, the US and UK.

Square foot (sq ft). A square 1 foot on each side, 0.0929 m². The usual unit for flat and office sizes in India and the US.

Going the other way, 1 square foot is 0.0000229568 acres.

Questions

How many square feet are in 1 acre?

1 acre is 43,560 square feet, and 1 square foot is 0.0000229568 acres.

How do I convert acres to square feet?

Use sq ft = ac × 43,560. For example, 2 acres × 43,560 = 87,120 square feet.

Is the acre to square foot factor exact?

The factor comes from the unit definitions. Results here are rounded to 6 significant digits for display.

How much is one square mile in square feet?

640 ac is 27,878,400 sq ft.

Source for the conversion factor: NIST Handbook 44, Appendix C (units of area).

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