Free FBA send-in calculator

Size an FBA transfer from velocity, lead time and target cover.

The formula

Send-in ≈ max(0, daily sales × (lead time + target cover) − fulfillable − inbound), then round to case pack. Cap by restock limits.

Worked example

30/day × 53 days − 400 = 1,190 units.

Example: 1,190 units.

Common questions

Amazon’s number?

No — your planning estimate. Check Seller Central limits.

Lead time?

Until fulfillable, including receiving.

Creates shipment?

No — sizes the transfer only.

Case packs?

Enter case pack to round up.

Is this calculator free?

Yes. Free in your browser with no account required.

Is there a free trial of OmniRestock?

Yes. 14-day free trial, every feature, no card required.