Triangular Prism Calculator

Calculate volume and surface area from the three triangle sides and prism length.

Last updated: June 2026 | By Patchworkr Team

Triangle and Prism Inputs

Side A

Side B

Side C

Prism Length

Side A is required.

Triangle area is computed with Heron's formula, then multiplied by prism length for volume.

Live Results

Enter valid triangle sides and prism length to see results.

Formulas

Triangle area: A = sqrt(s(s-a)(s-b)(s-c)), where s = (a+b+c)/2

Volume: V = A x length

Surface area: SA = perimeter x length + 2A

Example: sides 3, 4, 5; length 10

Triangle area: 6

Volume: 6 x 10 = 60

Surface area: 12 x 10 + 2 x 6 = 132

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