Maths & numbers
Trapezoid area calculator
Find area from parallel sides and perpendicular height.
A clear answer. Here’s how.
Trapezoid area = (a+b)h/2, where a and b are the parallel sides and h is their perpendicular separation. Sloping side lengths are not the height.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- First parallel side
- 8
- Second parallel side
- 5
- Perpendicular height
- 4
Example result
- Area
- 26