Shipment Unit Planner

Amazon's inbound limits turned shipment planning into a puzzle. You want to send 800 units, but your plan caps you at 200 per shipment, and your supplier packs 25 to a case. Now you're doing math instead of selling.

This tool sorts that out. Give it the units you want to send, the case pack size, and your per-shipment cap (default 200, but check your actual limit in Seller Central — it varies). It tells you how many cases to build and how many shipments that fills.

The case count is just units divided by case pack, rounded up. The shipment count divides by your cap the same way. The last shipment is usually short — that's the partial box you'll tape up with whatever's left. Plan for it so you're not staring at 37 loose units at midnight wondering if they fit a case.

Why this matters: every shipment you create carries an inbound placement fee, and Amazon's split-shipment logic can send one order to three warehouses. More shipments means more fees and more labels. Knowing the count up front lets you decide whether to pay for paid placement and keep it in one spot, or eat the splits.

It also keeps you honest about your cap. If the tool says you need five shipments but your remaining inbound allowance is three, you've got a problem to solve before the PO ships, not after it's on a boat.

Build the cases, print the labels, and the dock guy won't hate you. Small thing, but smooth inbound is half the battle.