Calculate volume and surface area of a triangular prism from base dimensions and length.
A triangular prism has two parallel triangular faces and three rectangular lateral faces. Volume = base area × length. The base area is found via Heron's formula.
Volume
V = base area × length
Surface Area
SA = perimeter × length + 2 × base area
This formula assumes a right prism (lateral edges perpendicular to the base). For oblique prisms, volume is still base area × perpendicular height.
The formula V = base area × length works for any prism. This calculator uses a triangular base specifically.