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Acres to Square Feet Converter

Convert acres to square feet, or square feet back to acres, using the international acre of exactly 43,560 square feet.

What this tool does

Convert acres to square feet, or square feet back to acres, using the international acre of exactly 43,560 square feet. Type an amount in acres (international), choose the units, and the tool converts it to square feet. It converts between these two area units, in either direction.

Inputs

  • Value: A number.
  • From: Choose one: Acre (international), Square foot. Starts as Acre (international).
  • To: Choose one of the same 2 units as "From". Starts as Square foot.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount. It appears once every required field has a valid value.

Worked examples

Conversions from acres (international) to square feet:

  • 1 ac = 43,560 ft²
  • 5 ac = 217,800 ft²
  • 10 ac = 435,600 ft²
  • 50 ac = 2,178,000 ft²
  • 100 ac = 4,356,000 ft²

Multiply the number of acres (international) by 43,560 to get square feet. Both units are exact definitions, so 43,560 is the exact factor: 1 ac = 43,560 ft².

Sources: Acre (international): exact by definition. Square foot: exact by definition.

Limitations

  • Converts units of area only. It does not work out an area from lengths or measure a plot.
  • Square-unit conversions treat the area as a number: nothing about shape or location is considered.

FAQs

Q: How many square feet are in an acre?
A: One acre is exactly 43,560 square feet. A quarter acre is 10,890 square feet.
Q: Which acre does this use?
A: The international acre, defined as 43,560 square international feet (4046.8564224 square meters). The US survey acre is larger by about four parts per million and is not offered here.

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