acres to square feet calculator

How to convert acres to square feet

This acres to square feet calculator multiplies the acreage by 43,560, because one acre is exactly 43,560 square feet. Type in any acreage, including decimals like 0.18 or 2.75, and you get square feet, square yards (acres × 4,840), and hectares (acres × 0.404686) at once.

Land is listed, taxed, and zoned by the acre. Almost everything you build or buy for that land, from sod and seed to a concrete pad or a gravel drive, is priced by the square foot. Converting first lets you compare a lot against a plan without guessing.

Where the 43,560 comes from

The acre is an old English field measure: a strip one furlong long (660 ft) and one chain wide (66 ft), roughly what an ox team could plow in a day. Multiply the two and you get 660 × 66 = 43,560 square feet. The number looks awkward because it came from plowing, not from the foot.

The calculator gives three outputs:

• Square feet = acres × 43,560
• Square yards = acres × 4,840 (because 43,560 ÷ 9 = 4,840)
• Hectares = acres × 0.404686

Square feet and square yards are rounded to whole numbers; hectares are shown to four decimal places.

Worked examples

1. A 2.5-acre rural parcel

• Square feet: 2.5 × 43,560 = 108,900 sq ft
• Square yards: 2.5 × 4,840 = 12,100 sq yd
• Hectares: 2.5 × 0.404686 = 1.0117, shown as 1.0117 ha

So a 2.5-acre parcel is just over one hectare.

2. A 0.18-acre suburban lot

• Square feet: 0.18 × 43,560 = 7,840.8, shown as 7,841 sq ft
• Square yards: 0.18 × 4,840 = 871.2, shown as 871 sq yd
• Hectares: 0.18 × 0.404686 = 0.0728 ha

If the house footprint is 1,800 sq ft and the driveway is 600 sq ft, about 7,841 − 2,400 = 5,441 sq ft remains for lawn, beds, and patio before setbacks.

Acres to square feet reference table

Acres	Square feet	Square yards	Side of a square lot
0.1	4,356	484	66.0 ft
0.25	10,890	1,210	104.4 ft
0.33	14,375	1,597	119.9 ft
0.5	21,780	2,420	147.6 ft
0.75	32,670	3,630	180.7 ft
1	43,560	4,840	208.7 ft
2	87,120	9,680	295.2 ft
5	217,800	24,200	466.7 ft
10	435,600	48,400	660.0 ft

The last column is the square root of the square footage. It is handy for picturing a lot. A 10-acre square happens to be exactly one furlong on each side.

Getting the acreage right before you convert

The conversion is exact, so any error comes from the acreage you start with.

• Use the deed or plat, not the listing. Listings often round to a tidy number such as “about 1/2 acre.” The recorded survey gives the real figure, often to two or three decimals.
• Check whether the acreage is gross or net. Some parcels include road right-of-way, easements, or a pond in the total. The usable area can be noticeably smaller than the deed figure.
• For your own measurements, measure the lot in feet, find the area with the square footage calculator, and then go the other way with the square feet to acres calculator.
• For metric documents, convert square meters with the square meters to square feet calculator rather than going through hectares twice.

Common mistakes

• Using 43,000 or 44,000 as a shortcut. On a 5-acre parcel, rounding to 43,000 loses 2,800 sq ft. That is enough lawn to need an extra pallet of sod.
• Confusing square feet with feet of frontage. A lot with 100 ft of road frontage is not 100 sq ft, and it is not a quarter acre. You need the depth as well.
• Treating acreage as perimeter. Fencing depends on shape. A square acre needs about 835 ft of fence. A 66 ft × 660 ft strip of the same area needs 1,452 ft.
• Mixing square yards and square feet. Sod and seed are often quoted per square foot, while topsoil spreads and some landscape bids use square yards. Check which unit a quote uses before you compare.

Related tools

Planning what goes on the land? The acreage calculator measures a parcel from its dimensions. The square yards to square feet calculator handles flooring and turf quotes. The grass seed calculator turns your square footage into pounds of seed.