Unit converter

Acres to Square Feet (acres to sq ft)

An acre is exactly 43,560 square feet, so you multiply acres by 43,560 to get sq ft. A quarter-acre lot is 10,890 sq ft and a half acre is 21,780 sq ft. The acre is also 4,046.86 m², if you need the metric figure.

Convert acres to sq ft

acres to sq ft

1 ac = 43,560 sq ft

1 ac = 43,560 sq ft · 1 sq ft = 0.0000229568 ac

Show the math

sq ft = ac × 43560

Uses exact legal definitions; results are rounded to 6 significant figures for display.

How to convert acres to sq ft

sq ft = ac × 43560

One acre is exactly 43560 square feet, so multiply by 43560.

Worked example: converting 1 ac:

sq ft = ac × 43560
1 ac × 43560 = 43,560 sq ft

Acres to sq ft conversion table

Common values, each computed with the exact formula and rounded to 6 significant figures.

Acres (ac) to Square feet (sq ft)
Acres (ac)	Square feet (sq ft)
0.1 ac	4,356 sq ft
0.125 ac	5,445 sq ft
0.15 ac	6,534 sq ft
0.2 ac	8,712 sq ft
0.25 ac	10,890 sq ft
0.3 ac	13,068 sq ft
0.33 ac	14,374.8 sq ft
0.4 ac	17,424 sq ft
0.5 ac	21,780 sq ft
0.6 ac	26,136 sq ft
0.75 ac	32,670 sq ft
1 ac	43,560 sq ft
1.25 ac	54,450 sq ft
1.5 ac	65,340 sq ft
2 ac	87,120 sq ft
2.5 ac	108,900 sq ft
3 ac	130,680 sq ft
4 ac	174,240 sq ft
5 ac	217,800 sq ft
10 ac	435,600 sq ft
20 ac	871,200 sq ft
40 ac	1,742,400 sq ft
80 ac	3,484,800 sq ft
100 ac	4,356,000 sq ft
160 ac	6,969,600 sq ft
320 ac	13,939,200 sq ft
640 ac	27,878,400 sq ft

Quick reference: everyday acres in square feet

Common suburban quarter-acre lot
0.25 ac = 10,890 sq ft
Half-acre lot
0.5 ac = 21,780 sq ft
One acre (a square 208.7 ft per side)
1 ac = 43,560 sq ft
American football field incl. end zones (360 × 160 ft)
1.32231 ac = 57,600 sq ft
A quarter section of farmland
160 ac = 6,969,600 sq ft
One square mile (a full section)
640 ac = 27,878,400 sq ft

Where 43,560 comes from

The acre began as a strip of land one furlong long (660 ft) and one chain wide (66 ft). 660 × 66 = 43,560 sq ft. The shape doesn't matter, only the area does. A square acre measures 208.7 ft on each side, and a 100 × 435.6 ft strip is also exactly one acre.

The US survey acre, based on the old US survey foot, was about 4 parts per million larger than the international acre used here. The difference amounts to under a fifth of a square foot per acre, so for property listings and lot sizes the two are interchangeable.

Lots, lawns and landscaping projects

Property listings give lot size in acres, but materials are sold by the square foot or cubic yard. To seed a 0.3-acre lawn you're covering 13,068 sq ft. Grass seed and fertilizer labels quote coverage per 1,000 sq ft, so that's about 13 'thousands'. Subtract the house footprint and driveway first, which the square footage calculator can add up section by section.

For gravel driveways or paths, work out the area in square feet, then use the gravel calculator to turn area and depth into cubic yards and tons. For poured slabs, the concrete calculator does the same for concrete.

Frequently asked questions

How big is an acre compared with a football field?

An American football field including both end zones is 360 × 160 ft, or 57,600 sq ft, about 1.32 acres. Without the end zones (300 × 160 ft) it's 48,000 sq ft, about 1.1 acres. So an acre is a bit smaller than the playing field between the goal lines.

How many square feet is a third of an acre?

A third of an acre is 14,520 sq ft (43,560 ÷ 3). Listings often round it to 0.33 acres, which converts to 14,375 sq ft, about 145 sq ft less. If the exact figure matters for zoning or a setback calculation, ask for the surveyed square footage rather than converting a rounded acreage.

How do I find the acreage of a lot from its dimensions?

Multiply the length by the width in feet to get square feet, then divide by 43,560. A 100 × 150 ft lot is 15,000 sq ft, or 0.344 acres. For irregular lots, split the shape into rectangles and triangles, add their areas, then convert. The square feet to acres converter does the final step.