How to Convert Acres to Square Feet?

Acres and square feet are units often used in area measurement of land and can be converted interchangeably with precise measurements. 1 acre expressed in terms of square feet measures 43,560 units. The following formula can be used for acres to square feet conversion –
Square feet (ft2) = acre (ac) x 43,560

For larger conversions, an area converter tool is preferable. These are precise calculators available online and display the results instantly.

What is an Acre?


An acre is expressed as an area of 1 chain by 1 furlong. Here, 1 chain equals 66 feet, whereas 1 furlong measures 660 feet precisely. The total area of 1 acre is equal to 10 square chains. An acre is a part of the US customary and imperial units system of measurement.

1 acre can be visualised as –

  • 150 cars parked in a square formation
  • 60% of a football field
  • Around 16 tennis courts

An acre is equal to 4,047 square meters, around 40% of a hectare, and comprises 640 square miles.

The origin of acre dates back to the Middle Ages when 1 acre equalled the area a man and a yoke of oxen can till in a day.

Several monarchs in England introduced the statutory measurement of an acre in varying degrees. During Queen Victoria’s reign, 1 acre equalled 4,840 square yards as per the British Weights and Measures Act of 1878.

The measurement of an acre also differed significantly throughout Europe before the metric system introduction. In India, acre units are primarily used to measure the area of agricultural land, whereas a square foot is used to measure residential plots.

What is Square Feet?


Square foot (plural – square feet) is the area of a square wherein all four sides measure 1 foot each. It is a US customary and imperial unit of area.

A square foot is measured by finding the length and breadth of an area and multiplying both the values.

In India, the square foot is mostly used in plot and flat measurements. The Real Estate (Regulation and Development) Act, 2016 also mandates that builders use it as a standard unit for property measurement.

Square feet is used to denote the following measurements in real estate –

  • Carpet area – Area of the floor excluding the inner walls and pillars (if any). The term originates from the area where carpet can be placed.
  • Built-up area – Carpet area along with the walls and balconies.
  • Super built-up area – Built-up area along with areas that can be accessed by others in an apartment. These include elevators, stairs, lobby along with swimming pool, gardens, etc. in some cases.

Acres to Square Feet Conversion (ac to sq ft) Table


Acre Square feet
1 43,560
2 87,120
3 130,680
4 174,240
5 217,800
6 261,360
7 304,920
8 348,480
9 392,040
10 435,600

How to Convert Acres to Square Feet (ac to sq ft)?


Conversion of 1 acre to sq ft can be done by multiplying the former with 43,560. Hence, 15 acres of land expressed in square feet is calculated as -
15 acres = 15 x 43,560 or 6,53,400 square feet

Utilise an online area converter for efficient acres to square feet conversion. These tools are available for free and display accurate results in no time.