Square Footage Calculator
Calculate area for various shapes including rectangles, circles, triangles, trapezoids and more
Rectangle
Area = Length × Width
Price Calculation (Optional)
Rectangle Border
Area = (L×W) - ((L-2b)×(W-2b))
Price Calculation (Optional)
Price Calculation (Optional)
Ring (Annulus)
Area = π × (R² - r²)
Price Calculation (Optional)
Triangle (Heron's Formula)
s = (a+b+c)/2, Area = √(s(s-a)(s-b)(s-c))
Price Calculation (Optional)
Triangle
Area = ½ × Base × Height
Price Calculation (Optional)
Trapezoid
Area = ½ × (b₁ + b₂) × h
Price Calculation (Optional)
Circular Sector
Area = (θ/360) × π × r²
Price Calculation (Optional)
Parallelogram
Area = Base × Height
Price Calculation (Optional)
Calculation Results
Calculation results will appear here...
All calculations use mathematical formulas for accurate area measurements
Area Calculation Formulas
Rectangle
Multiply length by width to get the area of a rectangle.
Area = Length × Width
Circle
Square the radius and multiply by π (approximately 3.14159).
Area = π × r²
Triangle
Multiply base by height and divide by 2 for triangle area.
Area = ½ × Base × Height
Trapezoid
Average the two bases, multiply by height for trapezoid area.
Area = ½ × (b₁ + b₂) × h
Sector
Fraction of circle area based on central angle in degrees.
Area = (θ/360) × π × r²
Parallelogram
Multiply base by perpendicular height for parallelogram area.
Area = Base × Height
Common Area Examples
Standard Room
4m × 5m = 20m²
Bedroom or living room
Basketball Court
28m × 15m = 420m²
NBA regulation size
Tennis Court
23.77m × 10.97m = 261m²
Singles court area
