Business
Inventory Turnover Calculator
Enter cost of goods sold, beginning and ending inventory, and the period length to find your inventory turnover ratio and how many days it takes to sell through your average stock.
See how many times inventory is sold and replaced over a period, and how many days of stock that represents.
A higher turnover generally means healthier cash flow and less capital tied up in stock — but too high can also mean you're stocking out and losing sales. Compare against your industry's typical range.
Inventory turnover
Turnover = COGS / Average inventory Days to sell = Period days / Turnover
Average inventory smooths out the swing between your starting and ending stock levels for the period, giving a more representative denominator than either snapshot alone.
How to use
- Pull cost of goods sold for the full period you're measuring, not revenue — turnover uses cost, not sale price.
- Enter beginning and ending inventory value (at cost) for that same period.
- Compare your turnover ratio against industry norms — fast-moving retail and slow-moving industrial equipment have very different healthy ranges.
Example
Input: $600,000 COGS, $90,000 beginning inventory, $110,000 ending inventory, 365-day period
Output: Turnover = 6x, ≈ 60.8 days to sell average inventory
Student-friendly breakdown
This walkthrough emphasizes the most searched ideas for Inventory Turnover Calculator: inventory turnover calculator, inventory turnover ratio calculator, days to sell inventory calculator. Start with the formula above, then follow the guided steps to double-check your work. For quick revision, highlight the givens, plug into the equation, and finish by verifying your units.
Need more support? Use the links below to open the long-form guide, browse additional examples, or hop into adjacent calculators within the same topic — each one is a quick way to double-check your work or handle a related question without starting from scratch.
Deep dive & study plan
Inventory Turnover Calculator: Calculates how many times inventory is sold and replaced over a period. It's built around inventory turnover calculator, inventory turnover ratio, days to sell inventory, so you can go from a raw question to a checked answer without switching tools.
The math behind it: Average inventory smooths out the swing between your starting and ending stock levels for the period, giving a more representative denominator than either snapshot alone. The core relationship is Turnover = COGS / Average inventory Days to sell = Period days / Turnover, shown above the calculator so you can see exactly how your inputs turn into the result.
To use it well: (1) Pull cost of goods sold for the full period you're measuring, not revenue — turnover uses cost, not sale price. (2) Enter beginning and ending inventory value (at cost) for that same period. (3) Compare your turnover ratio against industry norms — fast-moving retail and slow-moving industrial equipment have very different healthy ranges. Keep your units consistent as you go, and re-run a case you already know the answer to — it's the fastest way to catch a typo before it throws off a result you're relying on.
Worked example: entering $600,000 COGS, $90,000 beginning inventory, $110,000 ending inventory, 365-day period returns Turnover = 6x, ≈ 60.8 days to sell average inventory. Try swapping in your own numbers next, especially a case you're unsure about, before you use this for something that matters.
Quick retention checklist
- Speak the formula aloud (or annotate it) so the relationships stick.
- Write each step in your own words and compare with the numbered list above.
- Swap in new numbers for the Example to make sure the calculator (and your logic) handles edge cases.
- Check at least one related calculator below — it's the fastest way to confirm your numbers still line up from a different angle.
FAQ & notes
What's a healthy inventory turnover ratio?
It depends entirely on the industry — grocery and fast fashion often turn inventory 10+ times a year, while industrial equipment or luxury goods might turn over just 2-4 times. Compare against direct competitors rather than a universal benchmark.
Can turnover be too high?
Yes — very high turnover can mean you're stocking too thin and hitting stockouts, losing sales to unavailable inventory. Pair this metric with your stockout rate or fill rate to get the full picture.
What formula does the Inventory Turnover Calculator use?
Average inventory smooths out the swing between your starting and ending stock levels for the period, giving a more representative denominator than either snapshot alone.
How do I use the Inventory Turnover Calculator?
Pull cost of goods sold for the full period you're measuring, not revenue — turnover uses cost, not sale price. Enter beginning and ending inventory value (at cost) for that same period. Compare your turnover ratio against industry norms — fast-moving retail and slow-moving industrial equipment have very different healthy ranges.