Shipping Rate Comparison Calculator
Estimate and compare shipping rates across major carriers for your package.
Formula
Dim Weight = (L x W x H) / 139. Billable Weight = max(Actual, Dim). Rate = Base Rate + (Billable Weight x Per-Lb Rate) x Speed Multiplier + Insurance. Monthly Cost = Rate x Volume.
Frequently Asked Questions
How is dimensional weight calculated?
Dimensional (DIM) weight is calculated as Length x Width x Height / DIM factor. The DIM factor is 139 for domestic shipments (UPS/FedEx) and 166 for USPS. Carriers charge based on the greater of actual weight or DIM weight.
Which shipping carrier is cheapest for small packages?
For packages under 1 lb, USPS First Class is usually cheapest ($3-5). For 1-5 lbs, USPS Priority Mail is competitive. For heavier packages (5+ lbs), UPS and FedEx Ground often offer better rates, especially with volume discounts.
Can I get shipping discounts?
Yes. Use platforms like Pirate Ship, ShipStation, or Shippo for discounted USPS/UPS rates (often 50%+ off retail). High-volume shippers can negotiate direct carrier accounts. Many ecommerce platforms also include discounted shipping.
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