Packaging & Logistics
Carriers don't charge for what your package weighs. They charge for what it should weigh, based on its size — and the difference surprises almost everyone the first time.
These tools handle the unglamorous math of shipping: dimensional weight, void fill, pallet layers, girth limits, container loads, freight class. Get it right and you stop overpaying for air; get it wrong and a "cheap" shipment eats your margin.
Dimensional (Volumetric) Weight Calculator
Calculate a parcel's billable dimensional weight from its dimensions and carrier divisor.
Packaging Void Fill Calculator
Estimate the void-fill volume needed for a box after subtracting product volume from box volume.
Pallet & Box Arrangement Calculator
Calculate how many boxes fit per pallet layer and total load, with pallet height/tare and load-cap limits.
Courier Girth & Oversized Shipping Calculator
Calculate a package's girth and combined length-plus-girth, and check it against USPS, UPS and FedEx oversize thresholds.
CBM & Ocean Container Loading Calculator
Calculate cargo CBM and how many 20ft, 40ft or 40ft High Cube containers it needs, using a realistic packing-efficiency factor.
McKee Box Compression (ECT to BCT) Calculator
Calculate a corrugated box's compression strength (BCT) from ECT, caliper and perimeter using the McKee formula, then apply a safety factor.
Freight Density & NMFC Class Calculator
Calculate shipment density in pounds per cubic foot and map it to the current 13-tier NMFC freight class scale.
Questions
What is dimensional weight, in plain terms?
It's the weight a carrier bills you for based on box size. You multiply length × width × height and divide by a divisor, which is 139 for UPS and FedEx domestic shipments in inches. If that number beats the scale weight, you pay for the bigger one.
How do I stop paying for empty space in a box?
Shrink the box first, then fill what's left. Dropping one inch from each dimension of a 12 × 12 × 12 carton cuts the volume by about 25%. The void fill calculator shows how much cushioning the leftover gap actually needs.
When does freight class matter?
Once you're shipping LTL on pallets instead of parcels. Class runs from 50 to 500 and depends on density, handling and stowability, and a denser pallet generally lands in a cheaper class. The freight class tool works it out from your pallet's dimensions and weight.