Specialty Volume Calculators

Because a light, bulky box occupies space a carrier could have sold to someone else. Couriers compute a dimensional weight by dividing the parcel's volume by a divisor set by the carrier, then bill whichever is greater — actual or dimensional. A box of pillows is the classic case: barely any mass, but charged as if it were heavy.

Because litres describe how much water the board displaces, and displacement is what actually floats a rider. Length and width tell you little on their own — two boards of identical length can differ by several litres depending on thickness and foil. Volume is the one number that scales with the rider's body weight.

Gross is the raw internal space; net is what the air actually occupies once the driver, port and any bracing have been subtracted. Enclosure tuning depends on the net figure, so using gross volume produces a box that behaves differently from the design intent.

They measure the same thing in different units. CBM is cubic metres, the standard for ocean and air freight quoting; one CBM equals about 35.31 cubic feet. Freight rates are usually quoted per CBM, so shipments measured in feet have to be converted before they can be priced.