Amazon BSR Decay Predictor
How fast does your Best Seller Rank slip?
📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
Amazon BSR Decay Predictor
Watch your Best Seller Rank slide? Paste 7 days of BSR data — get a 30-day forward projection plus estimated daily sales. Spot rank-death trends 2 weeks before competitors.
How to use this tool
- 1
Enter 7-day BSR
Today, -1d, -2d... -6d. Comma separated.
- 2
Set category
Affects sales/BSR conversion ratio.
- 3
See projection
30-day rank trajectory + estimated daily sales.
Frequently Asked Questions
How does Amazon BSR work?
BSR is a per-category rank updated hourly based on rolling sales velocity. Lower number = better. Sales 24h ago weighs heaviest.
How accurate is BSR → sales?
Rough estimate. Top 100 in a major category = ~5K–50K units/month. Top 10K = ~10–100/day. Category-dependent. Use as ballpark.
What causes BSR decay?
Drop in conversion (price too high, bad reviews), reduced PPC, seasonal demand shift, inventory issues (going out-of-stock = BSR death).
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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.