Courier Divisors Explained (5000 vs 6000 vs 4000).
Different shipping channels and freight forwarders use different divisors to convert dimensional volume into billable weight:
| Logistics Channel | Metric Divisor (cm³/kg) | Imperial Divisor (in³/lb) | Typical Carriers |
|---|---|---|---|
| Domestic Couriers & Express | 5000 | 139 | Delhivery, DTDC, Blue Dart, FedEx, UPS |
| IATA International Air Cargo | 6000 | 166 | Airline Cargo Forwarders, Airport Freight |
| Premium Air Express | 4000 | 111 | DHL Express Worldwide, Specialized Air charters |
Tips to Reduce Volumetric Shipping Costs.
1. Cut Down Excess Box Height
Shaving just 5 cm off each carton dimension can reduce volumetric weight by up to 25% across multiple parcels.
2. Vacuum-Pack Soft Goods
Apparel, blankets, and textiles can be vacuum compressed to eliminate air pockets before boxing.
3. Use Custom-Fit Mailer Polybags
Flexible courier bags conform directly to goods and avoid rigid outer dimensional penalties.
Volumetric Weight FAQs.
What is volumetric weight (dimensional weight)?
Volumetric weight (also called dimensional weight or DIM weight) is a pricing technique used by courier and freight companies to estimate the amount of space a parcel occupies relative to its actual physical weight.
What is the formula for calculating volumetric weight?
In the metric system, the formula is: Length (cm) × Width (cm) × Height (cm) / Divisor (typically 5000 for domestic express couriers, or 6000 for IATA air cargo).
What is the difference between 5000 and 6000 divisor?
A divisor of 5000 is used by most domestic and international express couriers (e.g., Delhivery, DTDC, FedEx, DHL, Blue Dart). A divisor of 6000 is traditionally used in commercial IATA air freight forwarder bookings and results in a slightly lower dimensional weight.
What is chargeable weight?
Chargeable weight is the exact weight used by the shipping carrier to calculate your invoice. It is always whichever value is higher: the actual scale weight (gross dead weight) or the calculated volumetric weight.
How do you calculate CBM (Cubic Meters)?
Cubic Meters (CBM) is calculated by multiplying Length × Width × Height in metres: (Length in cm × Width in cm × Height in cm) / 1,000,000.
How can I reduce the volumetric weight of my package?
Use form-fitting corrugated cartons, avoid oversized boxes with excess void fill, use compression bags for textiles/clothing, and trim carton corners down to the exact height of the contents.