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Geometry Area Calculator
Circle · Triangle · Rectangle · Trapezoid · Ellipse
Shape & Inputs
Select Shape
Circle
Rectangle
Triangle (base × height)
Trapezoid
Ellipse
Circle Sector
Formula
A = π × r²
Calculate Area
Area
—
square units
Shape Preview
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Formula Reference
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Circle
A = πr²
▭
Rectangle
A = l × w
△
Triangle
A = ½bh
⬡
Trapezoid
A = ½(a+b)h
🥚
Ellipse
A = πab
🥧
Sector
A = ½r²θ