Example: Parallel side a: 8 · Parallel side b: 12 · Height: 5 → Area: 50.
Median (midsegment): 10
Frequently asked questions
How do I calculate trapezoid? Enter your numbers above and the result updates instantly. For example: Parallel side a: 8 · Parallel side b: 12 · Height: 5 → Area: 50.
Is this Trapezoid Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for trapezoid. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.