Calculate chargeable weight for Ocean LCL and Air Freight. Enter dimensions and weight — billing rule applied automatically.
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Golden Rule
Chargeable Weight = MAX ( Actual Weight, Volumetric Weight )
Volume Input
How to enter volume
cm
cm
cm
in
in
in
1 in = 2.54 cm · auto-converted to CBM
m³
ft³
pcs
—
Chargeable Weight Result🚢 OCEAN LCL — W/M RULE
Volume (CBM)
—
m³
Volume (CFT)
—
ft³
Gross Weight
—
Metric Tons
Revenue Tons
—
R/T (billed)
Enter values above to see result.
Freight Charge Estimator
$/R/T
Est. Base Charge
—
💡W/M Rule: 1 CBM = 1 Metric Ton = 1 Revenue Ton. Whichever is greater — volume or weight — is the billed unit. Always use gross weight (include pallets, packaging, dunnage).
Volume Input
How to enter volume
cm
cm
cm
in
in
in
1 in = 2.54 cm · auto-converted to CBM / DIM weight
m³
ft³
pcs
—
Chargeable Weight Result✈ AIR FREIGHT — DIM WEIGHT
Volume
—
m³ (CBM)
DIM Weight
—
kg
Actual Weight
—
kg
Chargeable Weight
—
kg (billed)
Enter values above to see result.
Freight Charge Estimator
$/kg
Est. Base Charge
—
💡DIM Weight: L × W × H ÷ DIM Factor. If DIM weight exceeds actual, cargo is bulky — billed on DIM. Always verify the DIM factor on the carrier's current rate sheet (5,000–7,000 cm³/kg).
Reference Guide
W/M & Billing Instructions
Everything your team needs to understand chargeable weight — Ocean LCL and Air Freight — in one page.
⚖️
The One Rule That Governs All Freight Billing
Chargeable Weight = MAX ( Actual Weight, Volumetric Weight )
Always bill on whichever is higher — the physical weight on the scale, or the space the cargo occupies. Never both, always the bigger one.
🚢
Section 1
Ocean LCL — W/M Rule
Revenue Tons (R/T) = MAX ( CBM, MT )
1
Measure each piece (L × W × H in cm)
2
Calculate CBM per pieceCBM = L × W × H ÷ 1,000,000
3
Total CBM = CBM × No. of pieces
4
Convert weight to Metric TonsMT = Total gross weight (kg) ÷ 1,000
5
Pick the higher → that's your Revenue Ton
6
Charge = R/T × Rate per R/T
CBM > MT
Bill on CBM
Light, bulky cargo
⇄
MT > CBM
Bill on MT
Heavy, dense cargo
💡 3 pallets · 120×100×90 cm · 350 kg each CBM = 3.240 · MT = 1.050 → Bill 3.240 R/T × $85 = $275.40
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Section 2
Air Freight — DIM Weight
Chargeable kg = MAX ( Actual Wt, DIM Wt )
1
Measure each piece (L × W × H in cm)
2
Calculate DIM weight per pieceDIM Wt = L × W × H ÷ DIM Factor
3
Total DIM Wt = DIM Wt × No. of pieces
4
Total actual weight = kg × qty
5
Pick the higher → that's your Chargeable kg
6
Charge = Chargeable kg × Rate per kg
DIM > Actual
Bill on DIM
Light, bulky cargo
⇄
Actual > DIM
Bill on Actual
Heavy, dense cargo
💡 2 cartons · 80×60×50 cm · 18 kg · DIM 6,000 DIM = 40 kg · Actual = 18 kg → Bill 40 kg × $3.50 = $280.00
📋
Quick Reference
Side-by-Side Comparison
🚢 Ocean LCL
✈ Air Freight
What we compare
CBM vs MT
DIM Weight vs Actual Weight
Volume formula
L × W × H ÷ 1,000,000
L × W × H ÷ DIM Factor
Standard factor
1 CBM = 1 Revenue Ton
6,000 cm³/kg (IATA standard)
Billing unit
Revenue Ton (R/T)
Chargeable kg
Charge formula
R/T × Rate per R/T
Chargeable kg × Rate per kg
CFT / inch convert
CFT ÷ 35.315 = CBM
Inches × 2.54 = cm first
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Using net weight
Always use gross weight — include pallets, packaging, and dunnage.
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Forgetting to × pieces
Calculate total CBM and total weight across ALL pieces before comparing.
❌
Wrong DIM factor
Always verify on carrier rate sheet. DIM factors vary: 5,000–7,000 cm³/kg.
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Mixing units
Convert everything to cm and kg before starting. Never mix cm with inches.