Area Calculator
Calculate area of common 2D shapes. All formulas and examples included.
Rectangle
Formula: Area = length × width
Example: length = 10, width = 5 → Area = 50
Triangle
Formula: Area = 0.5 × base × height
Example: base = 8, height = 5 → Area = 20
Trapezoid
Formula: Area = 0.5 × (base1 + base2) × height
Example: base1 = 6, base2 = 8, height = 4 → Area = 28
Circle
Formula: Area = π × r²
Example: radius = 7 → Area = 153.94
Sector
Formula: Area = (θ / 360) × π × r²
Example: radius = 6, angle = 90° → Area = 28.27
Ellipse
Formula: Area = π × a × b
Example: a = 5, b = 3 → Area = 47.12
Parallelogram
Formula: Area = base × height
Example: base = 10, height = 4 → Area = 40