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Free tool

Cubic feet calculator

Enter the size of a box and how many you have. This gives the cubic feet of one box, the whole lot, and the same total in cubic metres.

Inches, feet, centimetres or metres
Totals for a full shipment
Cubic metres and cubic inches too

Work out cubic feet

Cubic feet is the space a box takes up. Carriers, warehouses and freight forwarders all use it.

One cubic foot is 1,728 cubic inches, a box 12 inches on every side. One cubic metre is about 35.31 cubic feet.

How to calculate cubic feet

Measure the length, width and height of the box in inches. Multiply the three together. Divide the answer by 1,728. If you measured in feet, multiply the three and you are done. If you measured in centimetres, multiply them and divide by 28,317.

(Length × Width × Height in inches) ÷ 1,728 = cubic feet

A box 24 × 18 × 12 in is 5,184 cubic inches. Divided by 1,728, that is 3 cubic feet. Ten of them are 30 cubic feet, or 0.85 cubic metres.

Where cubic feet shows up in shipping

Freight class. LTL density is weight divided by cubic feet, and density sets the class. The freight class calculator does the whole sum.

Dimensional weight. Parcel carriers divide cubic inches by a divisor and bill on the result when it beats the scale. The dimensional weight calculator handles the divisors.

Ocean freight. Container space is quoted in cubic metres, so the metric total is the one a forwarder asks for.

Storage. Many warehouses bill space by the cubic foot or by the pallet. At BoxHero storage sits inside a flat monthly retainer with no overage charge.

Common questions

How many cubic inches are in a cubic foot?

1,728. A cubic foot is 12 inches by 12 inches by 12 inches.

How do I convert cubic feet to cubic metres?

Multiply by 0.0283. One cubic metre is about 35.31 cubic feet.

Should I measure the product or the box?

Measure the outside of the packed box. That is the size carriers and warehouses measure.

Does cubic feet change what I pay to ship?

Yes. For parcels, the cubic size of the box drives dimensional weight. For freight, cubic feet sets density and so the class. Either way a bigger box costs more.

Start with a price.

Tell us your orders a month and units per order. You see a per-order price before you commit to anything.

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