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Perimeter of Triangle Calculator

Find the perimeter of a triangle. Free online calculator with instant results — no login needed.

Side A Side B Side C

Perimeter

What is the Perimeter of Triangle Calculator?

Find the perimeter of a triangle. Free online calculator with instant results — no login needed.

Enter your values above and the result updates instantly. The sum of all three sides.

Perimeter = a + b + c

Perimeter

Works for any triangle?

Yes, add all three sides.