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 :   




Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems.




Recent Articles

  1. How to Test for Symmetry

    Aug 22, 19 05:03 PM

    How to test for symmetry - Graphs of relations can have two different types of symmetry.

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest


Math quizzes

 Recommended

Scientific Notation Quiz

Graphing Slope Quiz

Adding and Subtracting Matrices Quiz  

Factoring Trinomials Quiz 

Solving Absolute Value Equations Quiz  

Order of Operations Quiz

Types of angles quiz


Tough algebra word problems

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius!

Recent Articles

  1. How to Test for Symmetry

    Aug 22, 19 05:03 PM

    How to test for symmetry - Graphs of relations can have two different types of symmetry.

    Read More

K-12 math tests


Everything you need to prepare for an important exam!

K-12 tests, GED math test, basic math tests, geometry tests, algebra tests. 

Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.