Rectangular Prism Calculator
Volume, surface area and space diagonal of a rectangular prism.
How it works
Volume = l×w×h; Surface = 2(lw+lh+wh); Diagonal = √(l²+w²+h²)
A cube is the special case with equal sides.
Worked example
Base area 20, height 6: V = 20 × 6 = 120.
Cuboid 3×4×5: V = 60, surface area 2(12+15+20) = 94.
Notes and limitations
Any prism has volume base area × height, regardless of the base shape. Height is the perpendicular distance between the bases, not the slant edge.