How to use this calculator
Calculate trapezoid area using the lengths of the two parallel bases and the height.
How the calculation works
- Enter base A, base B, and height.
- The two bases are averaged.
- The average base is multiplied by height.
Formula
Area = (base A + base B) / 2 x height.
Example
Bases 8 and 12 with height 5 produce area 50.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- Use consistent units for all measurements.
- The height must be perpendicular to the bases.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.