Amazon Inventory Management & Stockout Guides

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Divide sellable units by daily sales to see how many days of stock you have left, and whether that beats your replenishment lead time.

Amazon FBA Reorder Point Calculator

Reorder point = daily demand × lead time + safety stock. Enter your numbers to see when to place the next purchase order.

15 guides

September 1, 2026·4 min read

Best Amazon Inventory Management Software (2026)

Restock tools range from $20/month reorder alerts to full purchase-order systems. The right one depends on lead times, catalog size, and how you actually buy stock.

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August 23, 2026·4 min read

Amazon IPI vs Sell-Through Rate: Which to Watch

IPI is the composite score that gates your FBA storage limits. Sell-through is one input you can actually move week to week. Watch the lever, not just the gauge.

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August 8, 2026·4 min read

Amazon BSR vs Sales Velocity: What Each Number Tells You

Best Sellers Rank is a recency-weighted relative position. Sales velocity is an absolute units-per-day rate. One reads the competition, the other plans your inventory.

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July 8, 2026·4 min read

The Amazon Stockout Alert That Actually Matters

By the time a listing hits zero inventory, the damage to rank and Buy Box is already done. Days-of-stock forecasting catches the problem much earlier.

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June 2, 2026·5 min read

Days of Inventory for Amazon Sellers Explained

Stock level shows how many units you have, but days of inventory shows how much time you have left. Here is the formula and the right sales window to use.

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May 29, 2026·5 min read

Amazon FBA Reorder Point Formula Explained

Reorder point equals daily demand times lead time plus safety stock. Lead time includes freight, customs, prep, and Amazon receiving, not just factory time.

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April 21, 2026·5 min read

Amazon Sales by Category: What Resellers Should Source Next

Category revenue alone is misleading: a bigger category can have lower margin, more returns, and worse Buy Box stability than a smaller, faster-turning one.

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April 6, 2026·5 min read

Amazon Stockout Recovery Plan: Before, During, After

The worst time to build a stockout plan is the day the listing hits zero. A real plan has three stages: before, during, and after inventory returns.

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January 12, 2026·5 min read

Amazon Sales Velocity: A Formula for Inventory Decisions

Sales velocity equals units sold divided by days in the period, though the window you pick and how you handle stockout days can change the number substantially.

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December 22, 2025·5 min read

Amazon FBA Inventory Statuses Explained

Amazon can hold 500 of your units while only 320 are available to sell. Available, reserved, inbound, unfulfillable, and stranded each mean something different.

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November 24, 2025·5 min read

Amazon Reserved Inventory Explained

Reserved inventory isn't one thing. Customer-order units are already sold, FC-transfer units may still be purchasable, and FC-processing units may need review.

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November 17, 2025·5 min read

Amazon Stranded Inventory: Causes and Fixes

Stranded inventory sits inside Amazon's network racking up storage charges while the offer is inactive. Here is what causes it and how to fix it fast.

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November 10, 2025·5 min read

Amazon IPI Score Explained: What Actually Moves It

IPI runs 0 to 1,000, based on excess inventory, sell-through, stranded stock, and in-stock performance. A lagging metric, not worth chasing past a safe number.

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November 3, 2025·6 min read

Amazon FBA Sell-Through Rate Explained

Amazon's sell-through metric divides units shipped over 90 days by average FBA inventory, a ratio, not a percentage, that can differ from spreadsheet math.

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September 29, 2025·6 min read

Amazon AWD vs FBA vs a 3PL: Building an Inventory Network

AWD is not just cheaper FBA storage, and a 3PL is not just a pricier warehouse. They are different control systems, and confusing them can cause stockouts.

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Inventory and stockouts

Free tools for this topic

15 guides

Best Amazon Inventory Management Software (2026)

Amazon IPI vs Sell-Through Rate: Which to Watch

Amazon BSR vs Sales Velocity: What Each Number Tells You

The Amazon Stockout Alert That Actually Matters

Days of Inventory for Amazon Sellers Explained

Amazon FBA Reorder Point Formula Explained

Amazon Sales by Category: What Resellers Should Source Next

Amazon Stockout Recovery Plan: Before, During, After

Amazon Sales Velocity: A Formula for Inventory Decisions

Amazon FBA Inventory Statuses Explained

Amazon Reserved Inventory Explained

Amazon Stranded Inventory: Causes and Fixes

Amazon IPI Score Explained: What Actually Moves It

Amazon FBA Sell-Through Rate Explained

Amazon AWD vs FBA vs a 3PL: Building an Inventory Network