Héron's Formula Calculator

Calculate triangle area using Héron's formula with three side lengths

Triangle Sides

Enter the lengths of all three sides of the triangle

Side A

Side B

Side C

Unit

Quick Examples

Try these common triangle configurations

How to Use

Calculate triangle area using the lengths of all three sides

Formula:

Area = √(s(s-a)(s-b)(s-c))

where s = (a+b+c)/2

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