Acre to Square Feet Converter

This acre to square feet converter changes acres into square feet and square feet into acres for anyone buying a building plot, planning a garden or comparing land listings in the UK or US. You can also type a plot's length and width in feet, yards or metres and get the acreage straight away, because an acre is defined as 43,560 square feet and every other figure follows from that. Results include square yards, square metres, hectares and the side length of a square plot of the same size.

Quick answer: One acre is exactly 43,560 square feet. An acre to square feet converter multiplies acres by 43,560, so half an acre is 21,780 sq ft and a quarter acre is 10,890 sq ft. To go back, divide square feet by 43,560: a 10,000 sq ft plot is 0.2296 acres.

What Is an Acre to Square Feet Converter?

An acre to square feet converter is a tool that expresses a land area given in acres as square feet, the unit used for floor plans and smaller plots. The formula is simply square feet = acres × 43,560, and acres = square feet ÷ 43,560. The number comes from the acre's old shape of one chain by one furlong, which is 66 feet by 660 feet.

Grace is buying a 0.35 acre self build plot in Kent and wants to know how much of it a 1,500 sq ft bungalow would cover. Multiplying 0.35 by 43,560 gives 15,246 sq ft, so the house footprint would use 9.8% of the land and leave around 13,700 sq ft for garden, drive and parking. The plot plan shows a 66 ft frontage, so she also knows the plot runs back about 231 ft.

How to Use the Acre to Square Feet Converter

Step 1: Choose What You Have

Pick acres if you have an acreage, square feet if you have a floor or plot area, or plot size if you only know the length and width. Switching between acres and square feet carries the current answer across so you can check it in reverse.

Step 2: Enter the Area

Type the figure from the listing or deed. The quick fraction buttons fill in a quarter, half, three quarters or one acre, which are the sizes people search for most when they see plots advertised.

Step 3: Or Measure the Plot

Choose plot size, then enter the length and width and the unit they were measured in. A tape measure in metres works as well as one in feet, and the tool handles the conversion. For a plot with an odd shape, split it into rectangles, convert each, and add the results.

Step 4: Read the Results

The large figure answers your question, and the tiles give the same area in square yards, square metres and hectares, plus the side length of a square plot of that size. The comparison box puts the area into tennis courts so it is easier to picture. For metric land sizes, the hectare to acre converter also turns land prices between per hectare and per acre.

How Many Square Feet Are in an Acre?

There are exactly 43,560 square feet in an acre. That equals 4,840 square yards or 4,046.86 square metres, and if you laid one acre out as a perfect square, each side would be 208.71 feet (63.61 m) long. The acre does not have to be square, though: the legal definition in the Weights and Measures Act 1985 fixes only its area, so a long narrow strip and a compact square plot can both be one acre.

How Do You Convert Square Feet to Acres?

Divide the square feet by 43,560 to get acres. A 5,000 sq ft back garden is 0.1148 acres, a 20,000 sq ft paddock is 0.4591 acres, and a 100,000 sq ft warehouse plot is 2.2957 acres. If your figure is in square metres instead, divide by 4,046.86, so a 600 m² plot is 0.1483 acres.

How Do You Work Out the Acreage of a Plot?

Multiply the length by the width in feet, then divide by 43,560. A plot 100 ft wide and 200 ft deep is 20,000 sq ft, or 0.4591 acres. If the plan is in metres, multiply the two sides and divide by 4,046.86 instead, or turn each side into feet first with the length converter and use the same formula. For plots that taper, average the two widths before multiplying, which is accurate for any shape with two parallel sides.

Acres to Square Feet Conversion Table

Acres	Square feet	Square metres	Side of a square plot
0.1	4,356	404.69	66.0 ft
0.25	10,890	1,011.71	104.4 ft
0.5	21,780	2,023.43	147.6 ft
0.75	32,670	3,035.14	180.7 ft
1	43,560	4,046.86	208.7 ft
2	87,120	8,093.71	295.2 ft
5	217,800	20,234.28	466.7 ft
10	435,600	40,468.56	660.0 ft

Older US documents may use the survey acre, which is 43,560 US survey square feet and works out at 43,560.17 international square feet. When NIST retired the survey foot at the end of 2022, the international figure became standard, so any listing comparing value per acre with value per square foot, a job the unit price comparison calculator handles well, can use 43,560 with confidence. Figures checked October 2026.

Key Terms for the Acre to Square Feet Converter

These unit definitions explain how the acre to square feet converter reaches its figures, helping you compare plots, listings and land prices accurately.

Acre

A unit of land area used in the UK and US, fixed by area rather than shape. Its exact size of 43,560 square feet descends from a strip one chain wide and one furlong long, the area a team could plough in a day.

International foot

The standard foot of exactly 0.3048 metres, agreed by international convention. Because the acre is defined in square feet, this constant links every imperial land figure to its metric equivalent without rounding.

Square yard

The area of a square measuring one yard on each side, equal to 9 square feet. An acre contains exactly 4,840 of them, a figure often seen in older UK deeds and turf or paving quotes.

Hectare

The metric land unit equal to 10,000 square metres, a square 100 metres on each side. It is roughly two and a half acres, and agricultural and European listings usually quote prices per hectare rather than per acre.

Chain and furlong

Traditional surveying lengths of 66 feet and 660 feet. Multiplying one by the other gives the acre, and a 66 foot frontage remains common on UK building plots for that historic reason.

Weights and Measures Act 1985

The UK statute that sets the legal definitions of imperial and metric units, including the acre. It fixes area only, so a long narrow strip and a compact square can both legally measure one acre.

Frequently Asked Questions