Rekenbox · 2026
Inventory turnover and days
See how fast stock moves and what a shorter holding period releases.How your result is built
How long does stock stay?
Cost of goods sold ÷ average inventory.
One turn takes an average of 91.25 days.
- Inventory value at target days
- €39,452.05
- Potential reduction in inventory value
- €20,547.95
- Selected period (days)
- 365
Assumptions, sources and version
2026 · nl-2026.1 · v2026.1
- Use inventory and cost of sales on the same cost basis, excluding VAT. Average inventory = (opening + closing) / 2. Turnover uses this average before rounding to cents; this average can be misleading for seasonal businesses.
- Turnover applies to the selected period. Inventory days = period days / turnover. The target scenario keeps the sales rate constant; lower stock must not unintentionally harm availability.
- Slimstock — omloopsnelheid (2026-09-06)
Save on this device for free
Understand your result
How this tool works
Inventory turnover divides cost of goods sold by average opening and closing stock. Inventory days divide the chosen period length by turnover. The target compares current average stock with daily cost of goods sold multiplied by target days. The difference is modelled capital headroom, not guaranteed cash.
Common questions
Do I use revenue or cost?
Use cost of goods sold and stock valued at cost, excluding VAT. Mixing sales revenue with stock at cost distorts turnover.
What happens with no sales?
With zero cost of goods sold, inventory days cannot be determined. The tool does not present a calculated cash release.
Which details do you need?
- Cost of goods sold during the period
- Inventory at the start of the period
- Inventory at the end of the period
- Period length (days)
- Target inventory days
Limits of this tool
- Use inventory and cost of sales on the same cost basis, excluding VAT. Average inventory = (opening + closing) / 2. Turnover uses this average before rounding to cents; this average can be misleading for seasonal businesses.
- Turnover applies to the selected period. Inventory days = period days / turnover. The target scenario keeps the sales rate constant; lower stock must not unintentionally harm availability.
Year: 2026 · Version 2026.1
Sources for this tool
- Slimstock — omloopsnelheid · calculation source checked 2026-09-06
Prepared by the Rekenbox product team at Winstwaker. The listed source references and calculation version make the method traceable. Report a content error Last updated: 2026-09-06. Rekenbox is a product by Winstwaker. The tool applies a calculation model to your inputs; a result or paid report is not a personal assessment by an adviser.