Triangular Prism Volume Calculator

Calculate the volume of a triangular prism by multiplying the area of the triangular base by the prism length. Ideal for sizing storage tanks, architectural features, aquariums, or packaging designs.

Measure the length of the triangle’s base perpendicular to the height
Use the altitude from the base to the opposite vertex
Enter the distance between the triangular faces along the prism

Assumes straight edges and uniform shape.

Examples

  • Base 3.2 m × height 2.4 m × length 6.5 m ⇒ 24.96 m³
  • Base 1.8 m × height 3.1 m × length 4.2 m ⇒ 11.72 m³
  • Base 0.9 m × height 0.75 m × length 2.5 m ⇒ 0.84 m³

FAQ

What is a triangular prism?

A solid with two triangular bases and three rectangular faces.

Can I use centimeters?

Yes. Convert each value to metres or use centimetres consistently and convert the result to your desired unit.

Is the triangle right-angled?

Any triangle works. If it is not right-angled, measure the perpendicular height from the base to the opposite vertex.

How do I handle sloping tanks or roofs?

If the cross-section is triangular and uniform along the length, this formula applies. For irregular shapes, break the solid into simpler prisms and sum their volumes.

Additional Information

  • Compute the triangular base area as ½ × base × height; the prism volume is that area multiplied by the length.
  • Keep all measurements in the same unit (metres, centimetres, or feet) before calculating to avoid scaling errors.
  • For right triangular prisms, the base and height correspond to the perpendicular legs of the triangle.
  • Convert cubic metres to litres by multiplying by 1,000 for quick capacity estimates.

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