Area Calculator
Calculate the area and perimeter of common geometric shapes.
Area Formulas Reference
Rectangle
A = w x h
width times height
Circle
A = πr²
pi times radius squared
Triangle
A = ½bh
half base times height
Trapezoid
A = ½(a+b)h
half sum of bases times height
Ellipse
A = πab
pi times semi-axes
Parallelogram
A = bh
base times height