Triangle Calculator
Calculate area and perimeter of a triangle.
Results
Area:
Perimeter:
What is this Online Triangle Calculator for?
The Triangle Calculator computes the area and perimeter of a triangle. It supports two methods: using Base & Height, or using the lengths of all three sides (Heron's Formula).
How does it work?
For Base/Height, Area = 0.5 * b * h. For three sides, it calculates the semi-perimeter (s) and uses Heron's Formula: √(s(s-a)(s-b)(s-c)).