Compare estimated dimensional weight across UPS, FedEx, USPS, and DHL without connecting carrier accounts.
Compare actual weight with dimensional weight by carrier.
Results will appear here after you enter positive dimensions, actual weight, and calculate.
Dimensional weight rules vary by carrier, service, destination, and contract. These results are estimates and should be verified with the carrier.
Learn how package dimensions affect billable shipping weight and carrier charges.
Dimensional weight is a billing weight based on how much space a package occupies. Carriers compare dimensional weight with the actual scale weight and often charge against the higher number. For bulky ecommerce shipments, the box can matter as much as the product weight.
Delivery trucks, planes, and sorting facilities run out of space before they run out of weight capacity. Dimensional weight gives carriers a way to price large, lightweight parcels that consume valuable network capacity.
Many checkout estimates use product weight, a default package, or rough averages. If the warehouse ships in a larger box, the carrier invoice can be based on a higher dimensional weight than the checkout estimate expected.
Why shipping quotes don't match what you're actually charged
Example order
Denver New York
Backpack
Weight
1 lb.
Dimensions
13 x 8 x 14 in
Mug
Weight
2.33 lbs.
Dimensions
5.4 x 5.4 x 6.1 in
Notebook
Weight
0.63 lbs.
Dimensions
5 x 8 x 0.5 in
Checkout quote
UPS Ground
$23.63
Carrier invoice
UPS Ground
$53.28
Loss on one order: $29.65
Loss on 100 orders: ~$3,000
Loss on 3,000 orders: ~$89,000
Packwell automatically selects the right box from available packaging options based on product dimensions, so your checkout shipping price matches what the carrier will charge.
Use the Packwell UI or REST API to integrate precise box selection and packing instructions into your existing business process.
Step 1
Add the boxes you use for shipping, or let Packwell calculate the ideal box size automatically.
Step 2
Send the items to be shipped, including dimensions, weight, and quantity. Optionally define packing rules like stacking or orientation.
Step 3
Packwell uses a 3D Bin Packing Algorithm to select the best box for shipping the items and minimize dimensional weight and wasted space.
Step 4
Use actual weight and dimensional weight to get accurate shipping rates from your carrier. No more undercharging or surprise costs.
Step 5
Follow the packing plan visualization to ensure orders are packed consistently and match what was quoted.
Run a sample order through Packwell in the interactive demo.
For stores that ship mixed-product orders from their own warehouse or 3PL. Calculate the package size before checkout so bulky or multi-item orders do not destroy shipping margin.
For stores that ship mixed-product orders from their own warehouse or 3PL. Calculate the package size before checkout so bulky or multi-item orders do not destroy shipping margin.
For distributors storing customer merchandise and shipping different combinations to employees, events, offices, or customers. Select the right box and quote shipping before the warehouse packs the order.
For gifting workflows where stored products are sent to many recipients in different combinations. Estimate package dimensions, charge shipping accurately, and give fulfillment teams packing instructions.
For teams building gift boxes, welcome kits, or event kits with customer-defined contents. Calculate the box size before ordering custom packaging and generate a packing layout that matches the desired presentation.
Get started
Packwell reduces dimensional weight charges by selecting the right packaging before checkout and fulfillment — for ecommerce brands, 3PLs, and gifting platforms.
Calibrated for
Medium (14×10×8)
Calculated instantly