TNT Volumetric Weight Calculator
International Express ÷5000 · Domestic Australia ÷4000 — chargeable weight as you type.
Enter a box below and the billable weight appears here — the number your carrier charges you for, after its divisor, its dimension rounding and its weight rounding.
Enter a box below and the billable weight appears here — the number your carrier charges you for, after its divisor, its dimension rounding and its weight rounding.
TNT Volumetric Weight: Quick Answer
TNT volumetric weight formula: Length × Width × Height (cm) ÷ 5,000 for International Express, or ÷ 4,000 (250 kg/m³) for TNT domestic services in Australia. TNT bills the greater of actual and volumetric weight, calculated per piece. Since the FedEx merger many TNT shipments now rate through FedEx systems. Divisors verified July 2026.
How TNT Calculates Volumetric Weight
TNT rates shipments on chargeable weight: the greater of actual weight and volumetric weight. For International Express the volumetric formula is L × W × H (cm) ÷ 5,000. For domestic services in Australia, TNT applies a 4,000 divisor — the same as saying 250 kg per cubic metre.
Example: a 60 × 50 × 40 cm carton weighing 12 kg. International: 120,000 ÷ 5,000 = 24 kg volumetric → billed at 24 kg. Domestic AU: 120,000 ÷ 4,000 = 30 kg → billed at 30 kg. The same box costs more domestically per kg of chargeable weight — which is why checking the right mode matters.
Since FedEx acquired TNT, many markets book TNT shipments through FedEx systems — if your account has migrated, use the FedEx calculator. For general air cargo booked through a forwarder, the IATA ÷6000 calculator applies instead.
Which TNT Volumetric Weight Rule Applies
The single most expensive mistake with TNT is applying the wrong divisor. Use this to identify your lane before you quote:
| Lane | Divisor | 1 m³ bills as | Typical booking route |
|---|---|---|---|
| International Express (cross-border) | ÷ 5,000 | 200 kg | TNT / FedEx international account |
| Domestic Australia (road & overnight) | ÷ 4,000 | 250 kg | TNT Australia domestic rate card |
| Air cargo via forwarder | ÷ 6,000 | ≈167 kg | Freight forwarder, not TNT direct |
TNT Volumetric Weight Worked Example: One Pallet, Two Lanes
Four cartons, each 60 × 40 × 40 cm at 9 kg. Volume per carton = 96,000 cm³.
- International (÷5,000): 19.2 kg volumetric vs 9 kg actual → billed 19.2 kg per carton = 76.8 kg for the shipment.
- Domestic AU (÷4,000): 24 kg volumetric vs 9 kg actual → billed 24 kg per carton = 96 kg.
Identical freight, 19.2 kg of billable difference, purely from the divisor. That gap is why confirming your lane matters more than shaving a centimetre off the box.
After the FedEx acquisition
FedEx acquired TNT in 2016 and has been folding TNT lanes into the FedEx network market by market. Practically this means three things for chargeable weight: your shipment may now rate on a FedEx rate card even if the label says TNT; imperial lanes use the FedEx 139 in³/lb divisor rather than a metric one; and surcharge schedules (oversize, additional handling, remote area) follow whichever network actually carries the freight. If your invoice header changed to FedEx, use the FedEx rules.
TNT Volumetric Weight Rounding and Minimums
TNT rounds each measured dimension up to the next whole centimetre before multiplying, then rounds the chargeable weight up — commonly to the next 0.5 kg on express services. A 39.2 cm side is measured as 40 cm; across three dimensions that rounding alone can add several billable kilograms on a large carton. Multi-piece consignments are calculated per piece and summed, not compared as shipment totals — see per-piece vs per-shipment billing for why that distinction changes the bill.
TNT Volumetric Weight FAQ
What divisor does TNT use for volumetric weight?+
TNT International Express uses 5,000 cm³/kg: L × W × H in cm ÷ 5,000 = volumetric weight in kg. TNT domestic services in Australia use a 4,000 divisor (equivalent to 250 kg per cubic metre). Always check your service terms — contract rates can differ.
How does TNT decide what weight to bill?+
TNT compares the actual weight against the volumetric weight for the shipment and charges the greater of the two — the chargeable weight. Light but bulky consignments are billed on volume.
Is TNT the same as FedEx now?+
FedEx acquired TNT in 2016 and has been integrating TNT services into the FedEx network; in many markets TNT shipments are now booked and rated through FedEx systems (typically 5,000 divisor or 139 in³/lb). If your account has migrated, check the FedEx dimensional weight rules.
How do I calculate TNT volumetric weight for multiple boxes?+
Calculate the volumetric weight per box, take the greater of volumetric vs actual for each box, then sum. This calculator does it automatically — add a row per box size and set quantities.
Can I measure in inches and get the result in kg?+
Yes. Dimension units (cm/in) and weight units (kg/lb) are independent here — enter inches, read kilograms. The conversion is handled internally.