Heron's formula calculator


Given the three lengths of any triangle, Heron's formula calculator will compute the area for you

A-triangle-image




Instructions for using the calculator

Note that the triangle above is only a representation of a triangle.

Your triangle may look different. However, all it takes to find the area is to enter the lengths of a, b, and c.

If the area = 0, this means that the lengths you entered gave a straight line instead of a triangle.

This happens when the length of one side (the longest side) equal to the sum of the other two sides

If it says NaN, the values you entered did not make a triangle

You make a triangle when the length of any side is smaller than the sum of the other two sides


Enter the length of a:        

Enter the length of b:        

Enter the length of c:       







The area is :   



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