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Amazon FBA inventory days of cover
Days of cover tells you how long your FBA stock will last at the current sales pace — the simplest early warning against stock-outs.
✓ Free to start, no credit card required. Free while in early access.
The formula
Sample: 600 units in FBA, 450 units sold in 30 days → 15/day → 40 days of cover.
Thresholds Selario uses
- Under 21 days — critical: “Low stock”.
- Under 60 days — low: “Reorder soon”.
- No sales in 30 days: no estimate.
Pick your own targets from supplier lead time + shipping + FBA check-in time, plus a buffer.
Watch out for TikTok spikes
A video that takes off can lift Amazon sales too, so a 30-day average lags. Keep an eye on Ripple and the TikTok Shop stock side.
Days of cover in Selario
Every product in Analytics shows a stock badge with FBA units, velocity and days left, plus TikTok warehouse stock for linked items. The iPhone home-screen app can push low-stock alerts.
Frequently asked questions
What is a good days-of-cover target for FBA?
It depends on lead time. Many sellers keep enough to cover lead time plus a buffer; Selario flags under 60 days as low and under 21 as critical.
Does Selario send low-stock alerts?
Yes, as push notifications in the iPhone home-screen app. Free to start, no credit card required.