Trapezium Calculator
Enter the two parallel bases and the height. Add the two non-parallel sides when you also want the perimeter.
A QUICK WALKTHROUGH
How to use this tool
- First parallel base
- Height
- Calculate
Area = (a + b) × h ÷ 2; median = (a + b) ÷ 2; perimeter = a + b + c + d when both legs are supplied.
Use one consistent length unit. Area is reported in square units. This evaluates formulas only; it does not check whether the bases, height and legs describe a geometrically consistent trapezium.
Inputs stay in this browser; nothing is sent.
Inputs stay in this browser; nothing is sent.
GOOD TO KNOW
Common questions
Trapezium Calculator
Area = (a + b) × h ÷ 2; median = (a + b) ÷ 2; perimeter = a + b + c + d when both legs are supplied.