Heron's Formula Area Calculator
Find a triangle's area from its three sides. Free online calculator with instant results — no login needed.
Area
What is the Heron's Formula Area Calculator?
Find a triangle's area from its three sides. Free online calculator with instant results — no login needed.
Enter your values above and the result updates instantly. Works when you know all three sides.
Formula
Area = √(s(s−a)(s−b)(s−c)), s = half-perimeter
Example
Area
FAQs
When to use?
When the height is unknown.
Related
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