Calculate dimensional weight for shipping carriers and compare billable weight outcomes.
Enter your values
Open the DIM Weight Calculator and fill in the required input fields with your numbers or selections.
Review the calculation
The tool automatically computes the result as you type. Double-check your inputs to ensure accuracy.
Interpret your results
Review the calculated output along with any breakdowns, charts, or explanations provided to understand what the numbers mean for your situation.
Go deeper with workflow guides, side-by-side comparisons, and reusable embeds connected to this tool.
Add this calculator to your website with a simple iframe.
Shipping Cost Estimator
Compare shipping costs across USPS, UPS, and FedEx. Calculates dimensional weight and finds the cheapest carrier.
Amazon FBA Fee Calculator
Calculate Amazon FBA fees including referral fees, fulfillment fees, and storage costs. Find your true profit per unit.
Dropshipping Margin Calculator
Calculate dropshipping profit margins after product cost, ads, payment fees, and returns.
eBay Fee Calculator
Estimate eBay seller fees, payment processing charges, shipping costs, and net profit per sale.
Etsy Fee Calculator
Calculate Etsy listing fees, transaction fees, payment fees, and total profit on each order.
Landed Cost Calculator
Estimate true imported product cost including duties, freight, insurance, and handling fees.
Print-on-Demand Profit Calculator
Estimate net profit per order for print-on-demand products after platform and fulfillment fees.
Product Pricing Calculator
Set product retail prices from target margin, COGS, and channel fee assumptions.
Dimensional weight (also called volumetric weight or DIM weight) is a pricing method used by shipping carriers that accounts for package volume rather than just actual weight. Carriers charge based on whichever is greater: the actual weight or the dimensional weight.
The dimensional weight formula is simple: multiply Length x Width x Height (in inches) and divide by the carrier's dimensional factor. UPS and FedEx use a dim factor of 139 for domestic shipments, while USPS uses 166. International shipments often use a factor of 139 across all carriers.
Dimensional weight pricing was introduced because large, lightweight packages take up valuable cargo space. A box of pillows, for example, might weigh only 5 lbs but occupy the same trailer space as a 50-lb box of books. Without dim weight pricing, carriers would lose money transporting bulky, lightweight goods.
To reduce dim weight charges, use the smallest box that safely fits your product. Eliminate excess void fill, consider poly mailers for soft goods, and explore custom box sizes instead of standard ones. Even reducing each dimension by one inch can meaningfully lower your billable weight and shipping costs over thousands of shipments.