Inventory Turnover Days Calculator
How many days inventory sits before it sells.
Enter your values
Enter the annual cogs in $.
Enter the average inventory value in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Inventory turnover
- 7.5x per year
- Days of inventory
- 48.7 days
- Average inventory value
- $80000
- Monthly turns
- 0.63
Quick answer
Days of inventory is 365 divided by the inventory turnover ratio, showing how long stock sits before selling.
turnover = COGS / average inventory; days = 365 / turnover
At a glance
| What it does | How many days inventory sits before it sells. |
|---|---|
| Category | Business |
| Inputs needed | Annual COGS, Average inventory value |
| Main output | Inventory turnover |
| Formula | turnover = COGS / average inventory; days = 365 / turnover |
| Cost | Free — no sign-up, no download |
How to use the Inventory Turnover Days Calculator
- 1Enter annual cost of goods sold.
- 2Enter average inventory value for the period.
- 3Higher turnover with lower days means cash is not tied up in stock as long.
Inputs explained
- Annual COGS($)
- Enter the annual cogs in $.
- Average inventory value($)
- Enter the average inventory value in $.
Worked example
Using the values the calculator loads with:
Inputs
- Annual COGS600000 $
- Average inventory value80000 $
Results
- Inventory turnover7.5x per year
- Days of inventory48.7 days
- Average inventory value$80000
- Monthly turns0.63
Frequently asked questions
What is a good turnover ratio?
It varies widely by industry — grocery may turn 15x+ a year while furniture might turn 2-4x.
How do I lower days of inventory?
Buy more frequently in smaller batches, or improve demand forecasting.
What do I need to enter into the Inventory Turnover Days Calculator?
Just 2 values: annual cogs, average inventory value. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Inventory Turnover Days Calculator work out the answer?
Days of inventory is 365 divided by the inventory turnover ratio, showing how long stock sits before selling. It applies the formula turnover = COGS / average inventory; days = 365 / turnover and shows the working so you can check each step by hand.
Is the Inventory Turnover Days Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.