How to use the trapezoid area calculator
Find the area of a trapezoid. Enter base a, base b, height in the fields above; the area, median are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- a — Base a
- b — Base b
- h — Height
Worked example
With base a = 8, base b = 5, height = 4, the calculator gives area ≈ 26; median ≈ 6.5.
Frequently asked questions
What is the formula for the trapezoid area calculation?
Area = (a+b) / 2 × h. Median = (a+b) / 2. Here a is base a, b is base b, h is height.
What inputs do I need for the trapezoid area calculator?
You need base a, base b, height. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.