Triangle Perimeter Calculator

Shape :
Calculate :
abc
P = a+b+c
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What is a Triangle ?

A triangle is a three-sided polygon with three angles. The sum of the interior angles of a triangle is always 180 degrees.

The formula for the perimeter(P) of a triangle is:

A = a + b + c

where:

  • P is the perimeter of the square
  • a, b and c are the lengths of the three sides.

To calculate the perimeter of a triangle, you add up the lengths of all three sides.

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.