Calculate the Perimeter of a Triangle

This will calculate the perimeter of a triangle based on the length of its sides.
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Triangle Perimeter - 3′ x 4′ x 5′
12feet
144inches
12′ 0″feet and inches
3.6576meters
365.76centimeters
(results may be rounded)

Perimeter of a Triangle Formula

Calculating the perimeter of a triangle is easy. Just add up the length of its 3 sides.

Perimeter = SideA + SideB + SideC

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Browse by Side Length in Centimeters
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Browse by Side Length in Meters
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