E-Commerce & Packaging ToolVolumetric Weight & Flat Rate Finder
Packaging & Box Fit Optimizer
Enter your product dimensions to find the exact matching box size, eliminate courier volumetric penalties, and evaluate whether Canada Post Flat Rate boxes will save you money.
Item Dimensions & Weight
Quick Item Presets:
Internal Cushioning Buffer (Bubble wrap):1.5 cm per side
0 cm (Tight fit)1.5 cm (Standard wrap)4 cm (Fragile glass)
Best Matching Box Profile27% Space Efficiency
Canada Post Flat Rate Box — Large
Outer: 40 × 30 × 19 cm
Actual Weight:1.50 kg
Volumetric (Dim) Weight:4.56 kg
Largest prepaid box option. Massive savings for coast-to-coast heavy parcels up to 5kg.
Ideal for: Winter jackets, small appliances, multiple shoe boxes, bulky craft kits
Canada Post Flat Rate Eligible
$32.49 CADFixed rate anywhere in Canada up to 5kg
All Compatible Packaging Options (2)
Sorted by fit efficiencyCanada Post Flat Rate
27% FitCanada Post Flat Rate Box — Large
40 × 30 × 19 cm (Max 5 kg)
Fixed national price $32.49 CAD regardless of destination zone.
Billable: 4.56 kg$32.49 CAD Flat Rate
Standard Corrugated
27% FitLarge Retail Box (14x12x8 in)
35.6 × 30.5 × 20.3 cm (Max 30 kg)
Volumetric weight (4.41 kg) exceeds actual weight (1.50 kg). Pack snugly to avoid courier dimensional penalty.
Billable: 4.41 kgBox cost: ≈ $2.60 CAD