Air Freight Chargeable Weight Calculator
Enter carton dimensions, piece count and gross weight to calculate airline chargeable weight using the IATA ÷6000 or express courier ÷5000 volumetric divisor. Shows whether actual or volumetric weight applies and by how much.
Enter carton dimensions, piece count and gross weight to calculate airline chargeable weight using the IATA ÷6000 or express courier ÷5000 volumetric divisor. Compares actual vs volumetric weight and shows which the airline will bill.
IATA ÷6000 is standard for airline belly cargo and air freight. Express couriers (DHL, FedEx, UPS) use ÷5000.
Formula
Volumetric Weight (kg) = L × W × H (cm) × Pieces ÷ Divisor | Chargeable = MAX(Actual Weight, Volumetric Weight)
The IATA volumetric divisor of 6,000 converts cm³ into kilograms for pricing purposes. Express couriers use 5,000. When a shipment's volume-to-weight ratio is high (light but bulky), the airline charges based on volumetric weight rather than the lighter actual weight — ensuring revenue per unit of space, not just weight.
Worked Example
10 cartons · 80 × 60 × 50 cm · total gross weight 85 kg · IATA divisor 6,000:
Volume per carton = 80 × 60 × 50 = 240,000 cm³
Total volume = 240,000 × 10 = 2,400,000 cm³
Volumetric weight = 2,400,000 ÷ 6,000 = 400 kg
Actual = 85 kg → Chargeable = MAX(400, 85) = 400 kg
Despite 85 kg actual weight, the airline charges 400 kg. At $3.50/kg this is $1,400 — versus $297.50 on actual weight. The volumetric weight multiplier of 4.7× is why right-sized cartons and dense packing reduce air freight cost dramatically.
FAQ
Frequently Asked Questions
Use this in your workflow
Use the chargeable weight in the Freight Cost per KG Calculator to find your effective freight rate, then feed freight cost per unit into the Landed Cost Calculator for full import cost. Browse all Business Calculator Hub.
Worked example: 20 cartons by air freight
A useful starting point before entering your own figures above.
| Item | Value |
|---|---|
| Carton dimensions (L × W × H) | 60 × 50 × 40 cm |
| Number of pieces | 20 |
| Total actual gross weight | 180 kg |
| Volume per carton (60 × 50 × 40) | 120,000 cm³ |
| Total volume (20 × 120,000) | 2,400,000 cm³ |
| Volumetric weight — IATA ÷6000 | 400 kg |
| Volumetric weight — courier ÷5000 | 480 kg |
| Chargeable weight (IATA) | 400 kg (volumetric wins) |
| Chargeable weight (courier) | 480 kg (volumetric wins) |
Interpretation: the shipment is relatively light (180 kg actual) but bulky. Volumetric weight (400 kg IATA / 480 kg courier) far exceeds actual weight, so the airline charges on volume. The courier rate is 20% higher for the same physical cargo — compare IATA airline freight vs courier rates based on chargeable weight, not just the per-kg price.
Limitations
This calculator assumes uniform carton dimensions. If your shipment has mixed carton sizes, calculate each size separately and sum the results. Most airlines and couriers round up each piece to the nearest 0.5 kg before summing — this rounding can add several kilograms across a multi-piece shipment and is not reflected here. Fuel surcharges, security fees and peak season surcharges are not included. Always confirm the final chargeable weight and all surcharges with your airline or freight forwarder.
When to use this calculator
- →Verifying airline or courier quotes — confirm that the stated chargeable weight matches the dimensions
- →Comparing IATA air freight vs express courier costs on the same shipment dimensions
- →Deciding whether air freight is viable before booking — checking if volumetric weight is significantly higher
- →Planning carton size changes to bring volumetric weight closer to actual weight
Frequently asked questions
What is air freight chargeable weight?
Chargeable weight is the weight the airline uses to calculate the freight charge. It is the higher of actual gross weight and volumetric weight. For light, bulky shipments the airline charges on volumetric weight; for dense heavy shipments actual weight is billed.
What is the IATA volumetric divisor?
The IATA standard volumetric divisor for air freight is 6,000 cm³ per kilogram. Express couriers (DHL, FedEx, UPS) typically use 5,000 cm³/kg, resulting in higher volumetric weights for the same dimensions.
How is the divisor applied if dimensions are in inches?
This calculator converts inches to centimetres automatically before applying the divisor. If calculating manually in inches, the equivalent divisors are 366 (for IATA/6000) and 305 (for couriers/5000).
Do airlines round up the chargeable weight?
Yes — most airlines and couriers round up each piece to the nearest 0.5 kg before summing. This rounding can add several kilograms on multi-piece shipments. Always ask your carrier for the exact rounding method.
Can I reduce air freight chargeable weight?
Yes: right-size cartons to remove wasted space, compress compressible goods, consolidate shipments into fewer denser cartons, and use lightweight packaging materials. A 10–20% reduction in carton volume often moves a shipment below the volumetric threshold.
What is the difference between this and the Freight Chargeable Weight Calculator?
Both calculators find chargeable weight as the greater of actual vs volumetric weight. This Air Freight calculator focuses on IATA (6000) and express courier (5000) divisors. The Freight Chargeable Weight Calculator covers additional divisors including road freight and LCL sea (4000) and also outputs total volume in m³.