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Acres to Square Feet (ac to ft²) Converter

1 acre (ac) = 43,560 square feet (ft²). To convert acres to square feet, multiply by 43,560: 5 ac × 43,560 = 217,800 ft².

1 ac = 43560 ft²
Convert the other way: Square Feet to Acres

Quick facts

How to convert acres to square feet

  1. Take the value in acres.
  2. Multiply it by 43,560 (the number of square feet in one acre).
  3. Round the result to the precision you need.
ft² = ac × 43,560

Worked example (a small farm): 5 ac × 43,560 = 217800 ft².

To convert square feet back to acres, multiply by 0.0000229568, or divide by 43,560.

Source: NIST SP 811 (2008). Marla and kanal use the Punjab standard stated in their definitions; local sizes can differ.

Acres to Square Feet conversion table

Acres to Square Feet conversion table
Acres [ac]Square Feet [ft²]
0.001 ac43.56 ft²
0.01 ac435.6 ft²
0.1 ac4356 ft²
0.5 ac21780 ft²
1 ac43560 ft²
2 ac87120 ft²
5 ac217800 ft²
10 ac435600 ft²

ac to ft² chart from 1 to 100

Square Feet to Acres conversion table

Square Feet to Acres conversion table
Square Feet [ft²]Acres [ac]
1 ft²0.0000229568 ac
10 ft²0.0002295684 ac
100 ft²0.0022956841 ac
1000 ft²0.0229568411 ac
10000 ft²0.2295684114 ac
100000 ft²2.2956841139 ac
1000000 ft²22.9568411387 ac

Acres vs Square Feet

AcreSquare Foot
Symbolacft²
Equals1 ac = 43,560 ft²1 ft² = 0.0000229568 ac

What is an acre?

A US customary and imperial unit historically based on the area a yoke of oxen could plow in a day. Used in the US and UK for land and real estate.

What is a square foot?

The area of a square with 1-foot sides. The standard unit for home and floor space in the US.

Frequently asked questions

How many square feet are in an acre?

There are 43,560 square feet in 1 acre (1 ac = 43560 ft²).

How many acres are in a square foot?

There are 0.0000229568 acres in 1 square foot (1 ft² = 0.0000229568 ac).

How do I convert acres to square feet?

Multiply the number of acres by 43,560. For example, 10 ac × 43,560 = 435,600 ft². To convert back, multiply by 0.0000229568.

What is 10 ac in square feet?

10 ac = 435,600 ft².

What is 100 ac in square feet?

100 ac = 4,356,000 ft².

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008). Marla and kanal use the Punjab standard stated in their definitions; local sizes can differ). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026