Inventory to Sales Ratio Calculator
Stock held relative to what you sell.
Inventory to sales ratio
0.50
$45,000 against $90,000
The ratio is rising, meaning stock is growing faster than the sales supporting it. That shows up here a quarter or two before it shows up in the bank balance.
How the Inventory to Sales Ratio Calculator works
The inventory-to-sales ratio is an early warning system. When stock grows faster than sales, the ratio rises before the cash problem appears on the bank statement — usually by a quarter or two, which is enough time to act.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How is inventory to sales ratio calculated?
Inventory value ÷ sales for the period, using consistent bases. £45,000 of stock against £90,000 of monthly sales is a ratio of 0.5. Lower means leaner.
What is a good ratio?
It varies by sector, so track your own trend rather than an absolute target. A ratio drifting upward over several periods means stock is accumulating faster than demand — which is what you want to catch early.
How does it differ from turnover?
It is roughly the inverse, on sales rather than cost of goods. Turnover uses COGS over average inventory; this uses inventory over sales. The direction of good is opposite, which trips people up when comparing.
Why is a rising ratio a warning?
Because it usually means either demand is softening while ordering continues, or buying has become too optimistic. Both end in the same place — cash trapped in stock — and both are far cheaper to correct early.