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Area of a Triangle Calculator

Find the area of a triangle from base and height.

Last updated: 25 Aug 2026

Quick answer

The area of a triangle is ½ × base × height. For example, base 10 and height 6 gives 30 square units. Enter base and height above to calculate.

Find the area of a triangle using Area = ½ × base × height.

How to calculate the area of a triangle

  1. 1 Enter the base.
  2. 2 Enter the height (perpendicular to the base).
  3. 3 We apply ½ × base × height.

Frequently asked questions

What is the area of a triangle formula?
Area = ½ × base × height, where height is perpendicular to the base.
What if I only know the three sides?
Use Heron's formula; this calculator uses base and height.
What units is the area in?
The same unit as base and height, squared.

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