Box Volume Calculator

Volume of a rectangular box (cuboid): V = Length × Width × Height. Surface area = 2(LW + LH + WH)

The calculator uses the standard published formula for box volume. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with watts. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Volume = L × W × H. Each step in the calculation is shown so you can verify the result manually.