Free Retail Inventory Calculators
Inventory Assassin's free calculators help retailers measure inventory aging, sell-through, dead-stock risk, carrying cost, and cash tied up in individual products.
Inventory Aging Calculator
Calculate the age and cost value of a single inventory item for free. See its aging bucket and learn when inventory may deserve attention.
Try it free →Dead Stock Calculator
Estimate dead-stock risk for one item free — enter units on hand, cost, and sales history to see a transparent risk classification.
Try it free →Slow Moving Inventory Calculator
Calculate sales velocity, months of supply, and possible excess inventory for one SKU — free, no signup required.
Try it free →Sell Through Rate Calculator
Calculate sell-through rate for one product free — units sold vs. units received, with units and cost remaining in stock.
Try it free →Cash Tied Up in Inventory Calculator
See exactly how much cash is currently invested in one product — free, instant, no signup required.
Try it free →Need to analyze more than one SKU?
Every calculator above handles one item at a time. Inventory Assassin runs the same kind of analysis across your entire uploaded inventory.
Run Your Entire Inventory Through Inventory Assassin →