Accurately determine the chargeable weight of your shipments. Compare actual weight vs. volumetric weight using the latest Canada Post formulas to avoid unexpected shipping costs.
Package Dimensions & Weight
Enter the dimensions and actual weight of your package.
Metric (cm / kg)
Imperial (inches / lbs)
Canada Post uses different divisors for metric (5000) and imperial (139).
Please enter a valid length greater than 0.
Please enter a valid width greater than 0.
Please enter a valid height greater than 0.
Please enter a valid weight greater than 0.
Billable (Chargeable) Weight
0.00 kg
Based on Actual Weight
Volumetric Weight:0.00 kg
Actual Weight:0.00 kg
Package Volume:0 cm³
Applied Formula:(L × W × H) / 5000
Comparison of Volumetric vs Actual Weight inputs
Parameter
Value
Status
What is the Canada Post Volumetric Weight Calculator?
The canada post volumetric weight calculator is an essential tool for eCommerce merchants, warehouse managers, and individuals shipping packages within Canada or internationally. It determines the "dimensional weight" (also known as volumetric weight) of a package, which is a theoretical weight based on how much space a box occupies in a truck or airplane relative to its actual density.
Carriers like Canada Post do not simply charge based on the scale weight. Instead, they compare the Actual Weight (how heavy it is) against the Volumetric Weight (how big it is). The higher of the two becomes the "Chargeable Weight" or "Billable Weight." This ensures that lightweight but bulky items—like pillows or bubble wrap—pay for the space they consume during transit.
Using a precise canada post volumetric weight calculator helps shippers anticipate costs accurately, optimize packaging sizes, and avoid unexpected surcharges on their monthly shipping invoices.
Canada Post Volumetric Weight Calculator Formula
The calculation logic used by the canada post volumetric weight calculator follows standard industry density factors. The formula differs slightly depending on whether you are measuring in metric (cm/kg) or imperial (inches/lbs) units.
Note: The divisor 5000 is the standard density factor. While 6000 was historically used for some ground services, 5000 is widely adopted for converting cubic centimeters to chargeable kilograms in modern logistics.
Result: The volumetric weight (0.45 kg) is lower than the actual weight (3 kg). Canada Post charges based on the 3 kg actual weight.
How to Use This Canada Post Volumetric Weight Calculator
Follow these simple steps to get an instant calculation:
Select Your Unit System: Choose between Metric (cm/kg) or Imperial (inches/lbs) using the dropdown menu.
Measure Your Package: Measure the longest side (Length), the second longest (Width), and the shortest (Height). Round up to the nearest whole number for safety, though our tool accepts decimals.
Weigh Your Package: Place the fully packed box on a scale to get the Actual Weight.
Enter Values: Input these numbers into the corresponding fields.
Analyze Results: The tool will instantly highlight the "Billable Weight." If the Volumetric Weight is higher, it will be displayed as the primary result.
Key Factors That Affect Volumetric Results
Several variables influence the final output of a canada post volumetric weight calculator. Understanding these can help you reduce shipping spend.
Packaging Efficiency: Using a box that is too large for the item increases the L×W×H value unnecessarily, driving up the volumetric weight.
Divisor Variations: While 5000 is standard for Canada Post, some private couriers or specific express services may use 6000 (which is cheaper) or smaller divisors. Always check the specific service guide.
Unit Rounding: Carriers often round dimensions up to the nearest centimeter or inch. A 30.2 cm box might be calculated as 31 cm, slightly increasing the cost basis.
Void Fill: Excessive use of bubble wrap or peanuts increases the required box size. Using denser, thinner protective materials can reduce box volume.
Carrier Surcharges: Extremely large packages might incur an "Oversize" surcharge independent of the volumetric weight calculation if they exceed maximum length limits (e.g., 2 meters).
Fuel Surcharges: Remember that fuel surcharges are applied as a percentage of the base shipping rate. A higher volumetric weight increases the base rate, thereby inflating the fuel surcharge amount as well.
Frequently Asked Questions (FAQ)
Does Canada Post always charge volumetric weight?
Generally, yes, for most parcel services. However, for very small packets or envelopes, the actual weight often applies because the volume is negligible. Always assume volumetric rules apply to parcels.
What is the divisor for Canada Post volumetric weight?
The standard density divisor is 5000 for metric calculations (cm/kg). For imperial calculations (inches/lbs), the equivalent divisor is 139.
Can I reduce my shipping costs by changing box shapes?
Yes. If you can reduce any dimension of your box without damaging the product, you lower the total volume. Custom-sized boxes are often a good investment for high-volume shippers.
Why is my chargeable weight higher than the scale weight?
This happens when your package density is low. The carrier is charging you for the "air" or space your package occupies in their vehicle, rather than just the physical mass.
Is this calculator accurate for international shipments?
Yes, the volumetric formula (L×W×H / 5000) is the IATA standard used for most international air freight and courier services, including Canada Post's international options.
What is the Cube Rule?
The Cube Rule is simply another term for Volumetric or Dimensional Weight pricing. It refers to pricing based on the cubic size of the shipment.
Does the weight include the box and packing materials?
Yes, "Actual Weight" must include the product, the box, tape, labels, and all internal cushioning. This is the Gross Weight.
How accurate is this canada post volumetric weight calculator?
This tool uses the mathematical formulas provided in carrier guides. However, final charges are always determined by the carrier's own measurement equipment at the sorting facility.
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