Convert acres to square feet

One acre is 43560 square feet. To convert any amount, multiply by 43560. Going the other way, one square foot is 0.0000229568411 acres.

Multiply the acre figure by 43560. So ft² = acre × 43560. For a quick mental estimate, multiplying by about 43560 gets you within a percent or so, which is close enough for most everyday purposes.

One acre is roughly a football pitch without the ends. The acre was originally the area one man with one ox could plough in a day. It is exactly 4,840 square yards, and is still the standard unit for land in the US, UK and Canada.

One square foot is about the size of a floor tile. The square foot is exactly 0.09290304 square metres. It remains the property unit in the US, Canada, the UK and much of South Asia.

Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding acre before converting introduces an error the conversion then multiplies.