Reorder Calculator

Amazon FBA Reorder Date Calculator

Enter current stock, daily sales velocity, and supplier lead time to get your reorder-by date, estimated stockout date, and minimum safety stock.

Inventory details

Current stock (units in FBA)

Daily sales velocity (units/day)Average units sold per day over the last 30 days

Supplier lead time (days)Production + shipping + FBA receiving time

Safety stock daysBuffer days before stockout — 14 days is a common baseline

Reorder timeline

Reorder by

Jun 16, 2026

Days of stock remaining30 days

Estimated stockout dateJul 16, 2026

Days until reorderOverdue — order now

Safety stock required140 units (14 days)

Your reorder date has passed. At current velocity you have 30 days before stockout. Place the order immediately.

Model full reorder with cash planning in the Reorder Simulator

Pro includes a Reorder Simulator that shows reorder dates, cash tied up in next order, and stockout risk across your full product portfolio.