Trapezoid Area Calculator
Compute the area of a trapezoid from its two parallel bases and height. Supports metric and imperial inputs and shows common unit conversions.
How it works
Area of a trapezoid = (Base A + Base B) ÷ 2 × Height. Enter both bases and the perpendicular height between them.
Notes on units: – Metric inputs are treated as centimetres (cm). Results are shown in cm² and m². – Imperial inputs are treated as inches (in). Results are shown in in² and ft² (and m² for reference).
What This Tool Does
The Trapezoid Area Calculator helps you quickly find the area of a trapezoid using its two parallel sides (bases) and height. Whether you’re working on geometry homework, engineering problems, or practical measurements, this tool applies the standard trapezoid area formula accurately and instantly.
It works for:
- Regular trapezoids
- Right trapezoids
- Isosceles trapezoids
- Irregular trapezoids (as long as bases and height are known)
The calculator supports both metric and imperial units and performs all calculations directly in your browser.
How to Use (Steps)
Follow these simple steps to calculate trapezoid area:
- Choose the unit system (Metric or Imperial).
- Enter Base A (first parallel side).
- Enter Base B (second parallel side).
- Enter the height (perpendicular distance between the bases).
- Click Calculate to instantly see the result.
To start a new calculation, click Reset.
Trapezoid Area Formula (Explained)
The formula for trapezoid area is:
Area = (Base A + Base B) ÷ 2 × Height
This equation works for:
- Right trapezoid area calculation
- Isosceles trapezoid area calculation
- Any trapezoid with known parallel sides and height
If you’re wondering how to find the area of a trapezoid, this formula is the standard method taught in mathematics and geometry.
Key Features
- ✔ Accurate trapezoid area calculator
- ✔ Supports metric and imperial units
- ✔ Instant calculation with no delays
- ✔ Works for right and isosceles trapezoids
- ✔ Mobile-friendly and responsive
- ✔ No ads, no tracking, no signup required
Privacy & Offline Usage
Your privacy matters.
This trapezoid area calculator:
- Runs 100% in your browser
- Sends no data to any server
- Stores no personal information
- Works offline after the page loads
You can safely use it without an internet connection.
FAQs
What is the formula for the area of a trapezoid?
The formula is:
(Base A + Base B) ÷ 2 × Height
How do you find the area of a trapezoid?
Measure the two parallel sides and the perpendicular height, then apply the trapezoid area formula.
Can I calculate the area of an isosceles trapezoid?
Yes. The same trapezoid area formula works for isosceles trapezoids.
Does this work for a right trapezoid?
Yes. Enter the two bases and height, and the calculator will handle it correctly.
Is this trapezoid area calculator free?
Yes, it is completely free and always will be.