When to use this calculator

• Before offering free shipping so you know the margin trade-off on the offer.
• When package size, carrier, or destination changes are moving the cost more than expected.
• When you need to compare shipping assumptions across store platforms or fulfillment setups.

Worked example

A 2-pound parcel in a 12 x 10 x 4 inch box might ship for about $8 to $10 with standard ground delivery. If the box gets slightly larger, dimensional pricing can push the cost much higher. On a lower-priced item, that difference can decide whether a free-shipping offer is a profit tool or a hidden loss.

Decision guide

Treat shipping as part of unit economics, not as a line item you fix after launch.

• If dimensional weight is the problem, shrink the box or consolidate the order into fewer parcels.
• If the cost swings by zone, adjust the shipping promise or set a threshold that matches those zones.
• If shipping wipes out too much margin, rerun pricing and break-even before you push more traffic.

What to do next

Once you know the real delivery cost, feed it into pricing and fulfillment decisions instead of treating it as a surprise later.

Related tools: Pricing Calculator, Profit Margin Calculator, Dropship Pricing Calculator, Inventory Tracker, and Break-Even Calculator.