What is the Container Volume Calculator?
The container volume calculator lists inside dimensions, door size, CBM and maximum payload for standard containers and tells you how many containers your cargo needs, based on CBM and weight.
Usable volume is less than the theoretical CBM because of gaps between cartons. To plan carton by carton, use the Container Loading Calculator; for pallets, the Pallet Capacity Calculator.
How to use the Container Volume Calculator
- Enter your cargo's total CBM and weight.
- Choose a container type or compare all.
- Set a fill factor (e.g. 85%).
- Read the containers needed.
Formula
Containers = max(CBM ÷ (container CBM × fill), weight ÷ payload), rounded up
Example
52 CBM weighing 14 tonnes at 85% fill needs two 20ft containers, or one 40ft (67 × 0.85 = 57 CBM).
Standard containers
| Type | Inside (L × W × H) | CBM | Max payload |
|---|---|---|---|
| 20ft | 5.90 × 2.35 × 2.39 m | 33 | ~28 t |
| 40ft | 12.03 × 2.35 × 2.39 m | 67 | ~26.5 t |
| 40ft HC | 12.03 × 2.35 × 2.69 m | 76 | ~26.5 t |
Related packaging and shipping tools
Packaging decisions are connected: the box size sets the volumetric weight, which sets the courier bill, and the carton size decides how many fit on a pallet or in a container. These related calculators help with the next step:
- Container loading calculator: cartons per 20ft or 40ft container.
- Pallet loading calculator: cartons per pallet.
- Pallet capacity calculator: pallets per container.
- CBM calculator: cubic metres for a shipment.
- Carton size calculator: master carton for inner boxes.
Frequently asked questions
What is the CBM of a 20ft container?
About 33 CBM.
What is the CBM of a 40ft container?
About 67 CBM; 76 CBM for a high-cube.
What is the payload of a 20ft container?
Around 28 tonnes, though road limits may be lower.
Why use a fill factor?
Cartons never fill every centimetre of space.
Is a 40ft twice the price of a 20ft?
No, usually much less than double, so it is often better value.
Is the Container Volume Calculator free to use?
Yes. The Container Volume Calculator on Custom Converter is completely free, with no sign-up, no daily limit and no watermark.
Does the Container Volume Calculator work on mobile phones?
Yes. It is built mobile-first and works on Android phones, iPhones, tablets and computers in any modern browser, with no app to install.