Trapezium calculator

Enter what you know about the trapezium and let the tool calculate the rest.
Note: You can use mathematical expressions.

This tool makes it easy to calculate sides, angles, height, perimeter and area of a trapezium.

A trapezium is a geometric shape that has four sides, two of which are parallel. An isosceles trapezium is a trapezium where the two non-parallel sides have the same length.

Calculations involving trapeziums can sometimes be done simpler by treating them as rectangles with two right-angled triangles on the sides. The area can be calculated by multiplying the mean of the two parallel sides by the height.

Area =
a + b
× h

Another word for trapezium, that is used mainly in the US and Canada, is trapezoid.

Geometric shapes: Circle, Parallelogram, Rectangle, Square, Trapezium, Triangle