What you provide
What you provide
- Length: First base dimension.
- Width: Second perpendicular base dimension.
- Height: Dimension perpendicular to the base.
SOLID GEOMETRY / BOX
Rectangular Prism Calculator
Calculate rectangular-prism volume, closed surface area, space diagonal, and base area from length, width, and height.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Three dimensions multiply for volume, three face-pair products form surface area, and all squares form the diagonal.
Calculation path
Volume = lwh; surface area = 2(lw + lh + wh).
What you receive
What you receive
- Rectangular-prism volume
- Closed surface area
- Space diagonal and base area
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
Dimensions are outside lengths of a complete rectangular solid; wall thickness and open faces are not deducted.
This is an educational planning result, not a structural, electrical, thermal, solar, battery, generator, or safety design. Confirm specifications, units, codes, and professional requirements before acting.