Inventory turnover ratio measures how many times a business sells and replaces its inventory in a period. A high ratio means inventory is moving fast (good: low holding costs, fresh stock, efficient capital use). A low ratio signals slow-moving stock (bad: high holding costs, potential obsolescence, capital tied up inefficiently). Formula: Inventory Turnover = COGS ÷ Average Inventory. Days Inventory Outstanding (DIO) = 365 ÷ Inventory Turnover. The Utility Spark Inventory Turnover Calculator computes both metrics and provides industry context to interpret whether your ratio is healthy.
lightbulb When to use this tool
- check_circle Benchmarking inventory efficiency against industry standards to identify if stock is moving too slowly.
- check_circle Identifying specific SKUs with low turnover ratios for clearance, discount, or discontinuation decisions.
- check_circle Assessing the impact of a new stock reduction initiative on the overall turnover ratio.
- check_circle Providing inventory efficiency metrics to investors, lenders, or board members.
Why use our tool?
Days Inventory Outstanding (DIO)
DIO = 365 ÷ Turnover ratio. More intuitive than the ratio: DIO of 45 means you hold 45 days worth of stock on average. High DIO indicates slow turnover; low DIO indicates fast turnover.
Industry Benchmarks
Turnover ratios vary dramatically by industry. Grocery: 15–25×. Apparel retail: 4–8×. Electronics: 6–12×. Manufacturing: 4–8×. The calculator provides context by industry so you know whether your ratio is competitive.
How it works
Enter COGS (Cost of Goods Sold) for the period.
Enter average inventory value ((Opening inventory + Closing inventory) ÷ 2).
The calculator shows: Inventory Turnover Ratio, Days Inventory Outstanding, and interpretation.
Examples
science Retail Business Inventory Turnover
Annual COGS: ₹1,20,00,000 | Average inventory: ₹20,00,000
Turnover ratio: 6× | DIO: 61 days
Interpretation: Stock is replaced every 61 days — acceptable for apparel retail, but slow for grocery