Operations · Free tool
Inventory Days Calculator
Enter average inventory value, COGS, and period to get Days Inventory Outstanding (DIO), turnover ratio, and a reorder suggestion. Bulk CSV mode handles SKU-level rollups.
DIO formula
- DIO = (Average Inventory ÷ COGS) × Days
- Turnover = COGS ÷ Average Inventory
Industry DIO benchmarks
| Industry | Healthy DIO |
|---|---|
| FMCG distribution | 15–30 |
| Apparel retail | 60–120 |
| Electronics retail | 30–60 |
| Pharma distribution | 25–45 |
| Cement / building materials | 20–35 |
Why DIO matters
Working-capital cycle = DIO + DSO − DPO. Every extra day of DIO ties up roughly 1/365 of your inventory in cash. A 10-day reduction on ₹50 Cr COGS frees ~₹1.4 Cr. SKU-level DIO is what drives actual reorder decisions - live inventory analytics in FireAI.
Get this calculator running on your live data
Try FireAI free — go from one-off calculations to a live dashboard updated every hour.
Frequently asked questions
Related free tools
Operations
DSO Calculator
Compute Days Sales Outstanding (DSO), AR turnover, and collection efficiency vs industry benchmark. Free, browser-only.
Industry-specific
OEE Calculator
Compute OEE = Availability × Performance × Quality. Colour-coded vs world-class 85%. Free, runs in browser. Indian manufacturing context.
Related guides & answers
Go deeper on the topics behind this operations tool.
Guide
What Is Inventory Analytics? Why It Matters for Indian Businesses
Inventory analytics measures stock health, turnover, and risk using your operational data. Learn what it includes (dead stock, safety stock, expiry), why it matters for working capital, and how FireAI builds inventory dashboards from Tally.
Guide
What is an Inventory Dashboard? Metrics and Features
An inventory dashboard provides real-time visibility into stock levels, turnover, reorder alerts, and dead stock. Learn what metrics belong in an inventory dashboard and how Indian businesses can build one from Tally or their ERP.