Welcome to this Heron's Formula Calculator

This is a calculator to determine the area of any triangle from its side lengths

Please enter your three side lengths, we will call them a, b, and c, below:

a:    b:    c:   




What is Heron's Formula?? What does it do??


This formula comes from pythagorean theorem in combination with the basic formula for the area of a triangle: bh/2.
We can use this to find the area of a triangle without finding the height. It is extremely useful.
√s(s-a)(s-b)(s-c)

Please watch the below video if you have any questions