Heron's Formula Calculator

Calculate the area and perimeter of a triangle from its three side lengths using Heron's formula

Frequently Asked Questions

What does Heron's formula need?

It needs only the three side lengths of a triangle, with no angle or height, to find the area.

Why might it report no triangle?

If any side is longer than the sum of the other two, the sides cannot close into a triangle, so the calculator reports an error.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.