Acres to Square Feet Converter

Convert between acres and square feet for lot size, land and yard planning.

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Acres to Square Feet Converter

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An acre is a fixed unit of area equal to 43,560 square feet, regardless of its shape -- it doesn't have to be square. To convert acres to square feet, multiply by 43,560; to go the other way, divide by 43,560.

This shows up constantly in property listings, lot surveys, and larger landscaping or grading projects where square feet alone becomes an unwieldy number. A typical suburban residential lot runs somewhere between a quarter and a third of an acre in many areas, though this varies enormously by region.

For smaller, more typical yard and garden project areas, see the Square Feet to Square Yards or Square Meters converters, which are more commonly useful at that scale.

Where these numbers come from

Standard unit-conversion factors. Material weight figures (where used) are typical averages -- check your specific supplier for exact density.

Frequently asked questions

How big is an acre in more everyday terms?

Roughly 90% of a football field (without end zones), or a square about 208 ft on each side -- though a real acre is rarely a perfect square in practice.

Why 43,560 specifically?

It comes from historical surveying units: an acre was originally defined as 1 chain by 1 furlong (66 ft by 660 ft), which multiplies out to exactly 43,560 square feet.

Is an acre the same everywhere?

The standard US survey acre and the international acre differ by a tiny fraction (about 4 parts per million) due to historical unit definitions -- for any practical construction or landscaping purpose, they're interchangeable.

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