Does this Triangle Area Calculator save my inputs?

No. The calculation runs in your browser and the page only displays the result for the values currently entered.

Why might my result differ slightly from another calculator?

Small differences usually come from rounding, unit choices, default assumptions, or a different formula variant. Check the inputs and formula assumptions first.

Triangle Area Calculator

Compute triangle area by base/height or side lengths.

Mathgeometryschoolarea

Base

Height

Triangle Area Calculator Formula

A = (base × height) / 2

Enter the known values and the calculator applies this formula to produce the main result, plus supporting values that help you check the answer.

Symbol	Variable	Description
base	Base	Base used by the calculator.
height	Height	Height used by the calculator.

How to Use the Triangle Area Calculator

1
Enter the known values
Fill in the fields and confirm that the units match the formula shown on the page.
2
Click Calculate
The primary answer appears in the highlighted row, with related check values underneath.
3
Read the result
The area is half of the matching rectangle area formed by the same base and height.

What This Calculator Is Best For

Use it for base-height triangle area problems in geometry, layout sketches, and quick material estimates.

Calculate a triangular garden bed.
Check a geometry assignment.
Estimate a triangular wall section.

How to Read the Result

The area is half of the matching rectangle area formed by the same base and height.

Before You Rely on the Result

Use the perpendicular height, not a slanted side, unless the slanted side is truly perpendicular to the base.

Triangle Area Calculator FAQ

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