Volumetric Weight Calculator for Air Freight
Answer: Air freight volumetric weight is calculated as length x width x height in centimeters x quantity divided by the carrier divisor, usually 6000 for IATA air freight.
Volumetric weight for air freight is length x width x height in centimeters x quantity divided by the carrier divisor, usually 6000 for IATA air cargo.
How the calculation works
Airlines and forwarders price cargo on the space it occupies as well as the weight it places on the aircraft. The calculator converts your dimensions to centimeters, multiplies them into cubic centimeters, and divides by the selected divisor.
air volumetric weight kg = length cm x width cm x height cm x quantity / divisorUse 6000 for standard air freight unless the forwarder says otherwise. Use 5000 for international express or courier-style services. After you get volumetric weight, compare it with actual gross weight; the higher value is the chargeable weight.
FAQ
What is the standard divisor for air freight?
The standard IATA-style air freight divisor is 6000 cm3 per kg. This means 6000 cubic centimeters count as 1 kg of volumetric weight.
Why do couriers use 5000 instead of 6000?
A 5000 divisor produces a higher billed weight for the same carton. Express networks handle many light ecommerce parcels, so the stricter divisor protects aircraft and van space.
Is volumetric weight the amount I pay on?
Not by itself. You pay on chargeable weight, which is the higher of actual gross weight and volumetric weight.
What dimensions should I enter?
Enter the outer packed dimensions, including carton bulge, tape, labels, and pallet height if the freight is palletized.
How do I know whether my cargo is too bulky for air freight?
Divide actual kg by total CBM. If the result is below 167 kg/m3 for IATA air, volumetric weight will usually be higher than actual weight.
Does the formula change for inches?
The metric formula still works after conversion. In US domestic inch-pound rating, carriers often use 139 in3 per pound, which is roughly equivalent to a 5000 cm3/kg divisor.
Does air freight have a minimum charge?
Yes. Even if dimensional weight is low, forwarders often apply a shipment minimum around 80 to 200 USD for small air freight bookings.
Comparison
| Service | Divisor | Volumetric formula | Best fit |
|---|---|---|---|
| IATA air freight | 6000 cm3/kg | L x W x H cm / 6000 | 50 to 2000 kg forwarder-managed air |
| Express courier | 5000 cm3/kg | L x W x H cm / 5000 | Small urgent parcels and samples |
| US domestic parcel | 139 in3/lb | L x W x H in / 139 | Domestic parcel networks |
| Ocean LCL | 1000 kg/CBM equivalent | max(CBM, metric tons) | Slower, cheaper bulky freight |
Dated facts
As of May 2026, standard international air freight quotes still commonly use the 6000 cm3/kg divisor, while DHL Express, FedEx International Priority, UPS Worldwide, and many ecommerce parcel networks commonly use 5000 cm3/kg. Typical non-peak China to US general-cargo air rates are often around 4.50 to 7.50 USD/kg before destination delivery and customs costs.
Related calculators
After calculating dimensional weight, confirm the billed number with the chargeable weight calculator, estimate the linehaul quote with the air freight cost calculator, and total carton volume first in the CBM calculator if your supplier only gave outer dimensions and piece counts.
Frequently asked questions
- What divisor should I use for air freight volumetric weight?
- Use 6000 for standard IATA air freight unless your forwarder gives a different divisor. Use 5000 for international express courier shipments.
- What is the air freight volumetric weight formula?
- Volumetric weight in kg equals length x width x height in cm x quantity divided by the divisor.
- Is air volumetric weight the same as chargeable weight?
- No. Volumetric weight is compared against actual gross weight. The higher number is chargeable weight.
- Why is the 5000 divisor more expensive than 6000?
- A lower divisor creates a higher volumetric weight from the same carton size, so courier pricing is stricter for light bulky cargo.
- Should I use product size or carton size?
- Use the outer packed carton or pallet dimensions. Airlines and warehouses measure the freight as tendered, not the product inside.
- How do I know if cargo is volume-sensitive?
- Divide actual gross weight by CBM. If the density is below about 167 kg/m3 for IATA air freight, volumetric weight will likely be higher.