Chargeable Weight Calculator (Air & Sea)
Compute volumetric vs actual weight and the chargeable weight carriers bill — air, LCL and courier divisors built in.
Carriers bill the GREATER of actual and volumetric weight. Air uses 6000 cm³/kg (IATA), couriers often 5000, sea LCL treats 1 cbm = 1000 kg. Light, bulky cargo 'cubes out' and pays on volume.
Sources & references
- IATA — volumetric weight standard (6000 cm³/kg)
- Sea freight W/M (weight or measurement) revenue-ton practice
Calculations use the formula described and the rates YOU enter — they are planning estimates, not quotations. Live freight rates, surcharges, duties and accessorials change constantly and vary by carrier and contract; confirm with your forwarder or carrier before quoting or booking.
Carriers don't sell weight or space — they sell whichever costs you more. Chargeable weight is the rule that enforces it: the greater of your shipment's actual gross weight and its volumetric (dimensional) weight, where volumetric weight converts the space occupied into a weight-equivalent using a mode-specific divisor. A box of pillows weighs little but fills a pallet — so it 'cubes out' and pays on volume, and the exporter who quoted on actual weight just lost margin.
About Chargeable Weight Calculator (Air & Sea)
The divisors encode each mode's economics. Air freight uses 6000 cm³/kg (the IATA standard); express couriers often use a denser 5000; sea LCL treats one cubic metre as 1000 kg (the W/M, weight-or-measurement, rule); road freight commonly 3000. Enter dimensions, pieces and actual weight, pick the mode, and this calculator shows the volumetric weight, the actual, and which one becomes chargeable — the number every rate-per-kg quote is actually multiplied by. Two habits this calculator builds: quote on chargeable weight, never actual (the single most common costing error in first-time exporting), and treat dimensional accuracy as a pricing input — rounding 119 cm up to 120 on a multi-piece shipment moves real money, and carriers re-measure. For borderline cargo, it also reveals when re-packing to a denser configuration (or choosing a courier's 5000 divisor over air's 6000) changes the bill. Pair it with the freight rate calculators below, which all bill on this number.
How to use Chargeable Weight Calculator (Air & Sea)
- 1Set each input — length, width, height, number of pieces — using your own figures.
- 2The estimate recomputes instantly as you type; no submit button, no waiting.
- 3Review the line-item breakdown to see how each component contributes to the total.
- 4Click “Copy quote” to paste the itemised result into an email, quote or audit note.
Why use Chargeable Weight Calculator (Air & Sea)?
- ✓Itemised line-by-line breakdown, not just a single opaque total
- ✓Copy-ready output for emails, quotes and audit notes
- ✓Recomputes live as you type — compare scenarios in seconds
- ✓Free and private — nothing you enter leaves your browser
Frequently asked questions
What is volumetric (dimensional) weight?+
A weight-equivalent of the space a shipment occupies, calculated as (length × width × height) ÷ a divisor. It exists because light bulky cargo costs a carrier space, not lift capacity — so they convert volume into a billable weight. If volumetric exceeds actual, the shipment 'cubes out' and you pay on volume; if actual exceeds volumetric, you pay on weight. The chargeable weight is always the greater of the two.
Why do air and courier use different divisors?+
Different cargo densities and commercial choices. Air freight's 6000 cm³/kg (1 cbm = 167 kg) is the long-standing IATA convention; many express couriers use 5000 (1 cbm = 200 kg), a denser factor that charges bulky parcels more — reflecting their tightly packed networks. The lower the divisor, the higher the volumetric weight for the same box, so a courier's 5000 can make the same parcel pay more than air's 6000. Always check which factor your carrier applies.
How does chargeable weight work for sea LCL?+
By the weight-or-measurement (W/M) rule: LCL is billed per revenue ton, where 1 cubic metre or 1000 kg, whichever is greater, equals one ton. So a 0.5-tonne shipment occupying 2 cbm bills as 2 revenue tons (volume wins); a dense 2-tonne shipment in 1 cbm bills as 2 tons (weight wins). FCL doesn't use chargeable weight — you pay per container regardless — which is part of the FCL-vs-LCL break-even math.
Can I reduce chargeable weight by repacking?+
Often yes, when you're cubing out: denser, smaller packaging lowers volumetric weight toward actual, reducing the billed figure — worth real money on bulky air shipments. The limit is the actual weight (you can't bill below it) and product protection. Choosing a mode with a higher divisor (air's 6000 over a courier's 5000) helps too. This calculator lets you test repack scenarios before they hit an invoice.
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