Trapezoid Area Calculator
Area and perimeter of a trapezoid.
Reviewed by James Whitfield · How we check our maths
Your values
ⓘ Live results
Results
- Area
- 32
- Median (midline)
- 8
- Perimeter
- 26
- Height
- 4
Working
- 1A = ((10 + 6) ÷ 2) × 4 = 32
Quick answer
A trapezoid's area is the average of the two parallel sides times the height.
The formula
A = ((a + b)/2) × h
Worked example
Worked example
Using the values the calculator loads with.
Inputs
- Parallel side a10
- Parallel side b6
- Height4
- Leg c5
- Leg d5
Result
- Area32
- Median (midline)8
- Perimeter26
- Height4
How to use the Trapezoid Area Calculator
- 1Enter both parallel sides.
- 2Enter the perpendicular height between them.
- 3Add the legs for the perimeter.
Frequently asked questions
What if it is a right trapezoid?
One leg equals the height — enter it in both fields accordingly.
Is a parallelogram a trapezoid?
Under the inclusive definition yes, since it has a pair of parallel sides.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error