ProMathTools
ProMathTools

Heron's Formula Calculator

Calculate the area of a triangle given its side lengths.

Enter side length a

Enter side length b

Enter side length c

How it works

Calculate the area of a triangle given its side lengths.


The Formula

Area = √(s * (s - a) * (s - b) * (s - c))
where s = (a + b + c) / 2

Worked Example

  1. Example: Find the area of a triangle with side lengths 3, 4, and 5.

    Given a triangle with side lengths a = 3, b = 4, and c = 5, calculate its area using Heron's formula.


Tips, Assumptions & Limitations

  • Make sure to enter valid side lengths.
FAQ

Heron's formula is a mathematical formula used to calculate the area of a triangle given its side lengths.

Companion article

Heron's Formula: A Step-by-Step Guide

Related Calculators

Browse Category

All Math Calculators

Related Guides


How this calculator works

Heron's formula is a mathematical formula used to calculate the area of a triangle given its side lengths. In this article, we will explain how to use Heron's formula and provide a step-by-step guide on how to calculate the area of a triangle.

Explanation

Heron's formula is based on the concept of the semi-perimeter of a triangle, which is half the perimeter of the triangle. The formula is given by: Area = √(s * (s - a) * (s - b) * (s - c)) where s = (a + b + c) / 2.

Formula

Area = √(s * (s - a) * (s - b) * (s - c))
where s = (a + b + c) / 2

Worked example

For example, given a triangle with side lengths a = 3, b = 4, and c = 5, we can calculate its area using Heron's formula.

How to use this tool

To use the Heron's formula calculator, simply enter the side lengths of the triangle and click the 'Calculate' button. The calculator will then display the area of the triangle.

Frequently asked questions

What is the formula for Heron's formula?
The formula for Heron's formula is: Area = √(s * (s - a) * (s - b) * (s - c)) where s = (a + b + c) / 2

Read the full guide →

About UsBlogChrome ExtensionFAQsTerms and ConditionsPrivacy PolicySitemap
EmailLinkedInFacebook

© 2025-2026 PromathTools. All rights reserved.

Built by KruskalCode – SaaS & Automation Experts · EverydayDevTools