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Parcel Size & Shipping Fee Estimator - Online Box Dimension Tool

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Parcel Size & Shipping Fee Estimator

Quickly calculate dimensional weight, volume, and get an estimated shipping cost using real carrier divisors.

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Frequently Asked Questions

DIM weight (volumetric weight) reflects package density. Carriers charge by whichever is greater: actual weight or DIM weight. It's calculated as (Length × Width × Height) ÷ Divisor.

Lightweight, large boxes take up precious cargo space. DIM weight ensures that pricing reflects both size and weight, preventing undercharging for bulky shipments.

Common divisors: 139 for FedEx/UPS domestic (inches), 166 for USPS/FedEx international. For metric (cm→kg) use 5000. Always check your carrier’s latest guidelines.

The tool gives a quick estimate based on billable weight and a single rate. Actual pricing depends on zone, fuel surcharges, and discounts. Use it for comparison and planning, not final quotes.

Measure the longest points in each direction (including bulges). For tubes, use diameter for width and height. DIM weight still applies; many carriers have specific formulas for non-box shapes.

Yes. Switch to metric units (cm/kg) and use divisor 5000 or 6000 as per carrier. Enter an appropriate per‑kg rate to model international costs.

Use a rigid measuring tape. Length is the longest side, width the shorter side of the opening, and height the remaining dimension (depth). Round up to nearest inch/cm.

That means your package is large but light – its dimensional weight exceeds its physical weight. The carrier will charge based on DIM weight to account for space used.

Enter parcel details to see results

Volume, DIM weight, billable weight & cost estimate
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