Construction
Square Footage Calculator
Area in ft², m², and acres for common shapes — plus a cost estimate.
Inputs
Square Footage Calculator
Result
Area
300 ft²
- Square meters
- 27.87 m²
- Acres
- 0.0069 ac
- Cost estimate
- —
How it's calculated
rectangle: A = a·b circle: A = π·(d/2)² triangle: A = ½·b·h L-shape: A = a·b + c·d
Common questions
How do I convert ft² to m²?
Multiply by 0.092903. So 1000 ft² ≈ 92.9 m². To go the other way, multiply m² by 10.7639.
How many ft² are in an acre?
One acre is exactly 43 560 ft², roughly 4047 m² or a square about 208.7 ft on each side.
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