Online Calculators

Square Feet to Acres | sq ft to ac

ft² to acre Converter
= 2.29568411E-5 ac

Divide by 43,560
for quick conversions

ft2 / 43,560 = ac


To convert ft2 to ac, use the conversion factor

1 ac = 43,560 ft2

then divide both sides of the equation by ac, to get the conversion ratio

1 = 43,560 ft2 / ac

Use the conversion ratio to complete the unit conversion, basically dividing the input by 1, the ft2 units cancel out, and we are left with ac units.

1 ft2 ÷ 43,560 ft2 / ac
= 2.29568411E-5 ac

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Calculator Use

Convert area units of square feet (ft²) to acres (ac). Answer will include the formula for quick conversions from ft² to ac.

The square feet symbol is ft² however you will also see it represented as sf, sqft or sq ft.

To convert ac to ft² use the Acres to Square Feet Converter

How to convert square feet to acres

Divide square foot area by 43,560


1 acre is defined as exactly 43,560 square feet. Stated differently, there are 43,560 square feet in an acre and this can be written 43,560 ft²/ac.

Therefore, to convert square feet to acres divide by 43,560 ft²/ac. Units of ft² will cancel, and you are left with ac area units.

ac = ft² / 43,560 ft²/ac

Alternatively 1 square foot is 1/43,560 acres which is about 2.295684E-5 ac and we can state that there are 2.295684E-5 acres per square foot or 2.295684E-5 ac/ft². Multiply this conversion factor by square feet to convert to acres. The ft² cancel and ac remains.

ac = ft² × 2.295684E-5 ac/ft²

Quick Conversion
Multiply by
or Divide by
square feet to acres
acres to square feet

Example: Convert 10,000 square feet to acres.

10,000 ft² to ac is calculated here using the division factor 43,560
10,000 ft² / 43,560 ft²/ac
Divide through and cancel ft² units
10,000 ft² / 43,560 ft²/ac = 0.22957 ac

10,000 ft² ≈ 0.23 ac


The acre is a unit of area and has the symbol ac. Historically an acre is a measure of land area in the British imperial system of units and United States customary units and was defined as exactly 66 ft x 660 ft which equals 43,560 ft². 1 ac = 43,560 ft². Therefore, 1 ft² is exactly 1/43,560 ac which is about 0.0000229568411 ac. 1 ft² ≈ 2.295684E-5 ac.

Square Foot

A square foot is a unit of area and has the symbol ft² but you will also see people use sf, sqft and sq ft. Three square feet can be expressed as 3 ft². 1 square foot is the area of a square that has all sides equal to 1 foot. The length and width of this square is 1 ft x 1 ft = 1 ft² since area of a square is calculated by multiplying length by width. The foot is a unit of length in the British imperial system of units and United States customary units. 1 square foot is exactly 1/43,560 acres.


Cite this content, page or calculator as:

Furey, Edward "Square Feet to Acres | sq ft to ac" at https://www.calculatorsoup.com/calculators/conversions/square-feet-to-acres.php from CalculatorSoup, https://www.calculatorsoup.com - Online Calculators

Last updated: August 21, 2023

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