E-Commerce & Retail
Inventory Turnover & Burn Rate Calculator
Know when you will run out of stock. Enter on-hand units, cost per unit, and average weekly sales to get turnover ratio and a days-until-stockout indicator.
Inputs
Results
Days until stockout
—
At current weekly velocity
Inventory turnover / year—
Inventory value—
Weekly burn (units)—
Reorder warning—
How this calculator works
- Enter current units on hand and cost per unit.
- Add average units sold per week.
- Optionally set reorder lead time in days.
- See turnover, days to stockout, and reorder warning.
Why this matters
Know when you will run out of stock. Enter on-hand units, cost per unit, and average weekly sales to get turnover ratio and a days-until-stockout indicator.
Frequently asked questions
What is a good inventory turnover ratio?
It depends on category. Fashion may turn faster than durables. Compare against your own history and supplier lead times.
How do you calculate days until stockout?
Divide current units by average daily sales (weekly sales ÷ 7).
Why track inventory burn rate?
Burn rate shows how fast stock depletes so you can reorder before lost sales and rush shipping fees.
Does cost per unit affect turnover?
Turnover is unit- or COGS-based depending on method. This tool shows both unit velocity and inventory value at risk.