Inventory Turnover & Days on Hand Calculator

Use your own inventory figures to see how quickly stock moves and how much inventory may be sitting too long.

Use consistent cost-based inventory values for turnover. Seasonal businesses should compare equivalent periods rather than treating one snapshot as a permanent benchmark.

Need listing age, fees, profit and stock decisions together?

The Reseller Inventory, Sell-Through and Profit Dashboard tracks purchase cost, listings, platform fees, shipping, inventory age, net profit, sell-through and markdown or reorder decisions in one workbook.

How to read these metrics

Turnover measures how often average inventory value moves through cost of goods sold during the selected period. Days on hand converts that pace into an approximate number of days. Sell-through measures units sold as a share of units made available. A slow result is not automatically bad—seasonality, long lead times, deliberate safety stock and high-margin products can justify more inventory—but the numbers help identify products worth reviewing.