Square Footage Calculator
Measure any space in seconds. Pick a shape — rectangle, circle or triangle — enter its dimensions, and get area in square feet and square meters plus total material cost with a waste allowance for cuts, mistakes and pattern matching.
TheCalculators — Square Footage Calculator
Printed thecalculators.com
Total Area
120 sq ft
11.15 m² · 12 × 10 ft
- Shape
- Rectangle
- Dimensions
- 12 × 10 ft
- Area (sq ft)
- 120
- Area (m²)
- 11.15
- Area (sq yd)
- 13.33
- Area (acres)
- 0.0028
- Material Cost
- $300.00
- Cost + 10% Waste
- $330.00
How the area is computed
- 1Shape formulaA = length × width = 12 × 10 = 120 sq ft
- 2Metric conversion120 sq ft × 0.092903 = 11.15 m²
- 3Material cost120 sq ft × $2.50 = $300.00
- 4With waste$300.00 × (1 + 10%) = $330.00
Cost at different material prices
For multi-room projects, calculate each space separately and add the areas. Tile and hardwood usually need 10–15% waste; 20% for diagonal layouts.
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Formula
Rectangle A = L × W · Circle A = πr² · Triangle A = ½ × b × h · 1 sq ft = 0.092903 m²
Pro tips
- • Measure to the inch, not the foot — errors multiply across a room.
- • Buy material in the same lot/dye lot for the whole area to avoid color mismatches.
FAQ
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