Surface Area of a Triangular Prism Calculator

Your details

Choose the triangle type that matches your known measurements.
One leg of the right-angle triangle base.
cm
The other leg of the right-angle triangle base.
cm
The length (depth) of the prism from one triangular face to the other.
cm
Total surface area
132cm²

Sum of all five faces: 2 triangular bases + 3 rectangular lateral faces

Lateral surface area120cm²
Base area (one triangle)6cm²
Perimeter of base12cm
Volume60cm³

Total surface area: 132.00 cm² (right triangle base).

  • The 3 rectangular side faces account for 90.9% of total surface area (120.00 cm²).
  • The 2 triangular bases together make up 9.1% of total surface area (12.00 cm²).
  • The volume of this prism is 60.00 cm³.

Next stepTo reduce material use in manufacturing or packaging, lowering the prism length or using a more compact triangle shape (equilateral) minimises the surface-area-to-volume ratio.

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