Dimensional Weight Calculator
Instantly calculate DIM (volumetric) weight and billable weight for Canada Post, Purolator, UPS, FedEx, and DHL. Metric and imperial. No sign-up required.
How DIM Weight Is Calculated
All major Canadian carriers use a DIM factor of 5,000 for metric shipments:
DIM Weight (kg) = Length × Width × Height (cm) ÷ 5,000The carrier bills whichever is greater — actual weight or DIM weight.
Why Dimensional Weight Matters for Canadian Sellers
Carriers Charge More
When your parcel's DIM weight exceeds its actual weight, carriers bill you the higher DIM rate. Many sellers are surprised by this when shipping lightweight but bulky products.
5,000 Is the Standard
Every major Canadian carrier uses a DIM divisor of 5,000 cm³/kg. This calculator applies that factor automatically across all five carriers.
Reduce Costs with a 3PL
CanadiEx negotiates volume rates with all five carriers, reducing the impact of DIM weight charges by 30–55% compared to retail shipping rates.
Frequently Asked Questions
What is dimensional weight (DIM weight)?
Dimensional weight, also called volumetric weight, is a pricing technique used by carriers to account for the space a package occupies. Carriers charge based on the greater of actual weight or dimensional weight, so a large but light package may cost more than expected.
What DIM factor do Canadian carriers use?
All major Canadian carriers — Canada Post, Purolator, UPS, FedEx, and DHL — use a DIM factor of 5,000 for metric shipments. The formula is: DIM Weight (kg) = Length × Width × Height (cm) ÷ 5,000.
When does DIM weight apply?
DIM weight applies when it is greater than the actual weight of the parcel. If your package is physically large but light (e.g., pillows, foam, empty boxes), you will almost certainly be billed on dimensional weight.
How can I reduce my DIM weight charges?
Use right-sized packaging — avoid oversized boxes with excessive void fill. Work with a 3PL like CanadiEx that negotiates volume-based carrier rates, which can reduce DIM weight surcharges by 30–55%.
Also useful: Canada Shipping Cost Estimator · CBM & Pallet Calculator
Tired of Paying Retail DIM Weight Rates?
CanadiEx clients ship at negotiated carrier rates — up to 55% less than retail. Same-day fulfillment, 99.9% accuracy.
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