Inventory Days of Coverage Calculator
Days of coverage equal usable inventory divided by average daily demand. A stock of 420 units at 30 units per day covers 14 days in this simplified model.
Formula & method
Days of coverage = usable units on hand ÷ average units demanded per day.Worked example
| Input | Value |
|---|---|
| Usable stock on hand | 420 |
| Average daily demand | 30 d⁻¹ |
| Result | Value |
|---|---|
| Modeled stock coverage | 14 d |
| Modeled stock coverage | 2 7d |
Compare scenarios
The first input changes while the other example inputs stay fixed. These are arithmetic scenarios, not forecasts.
| Compare scenarios | Usable stock on hand | Modeled stock coverage | Modeled stock coverage |
|---|---|---|---|
| −20% | 336 | 11.2 d | 1.6 7d |
| Example | 420 | 14 d | 2 7d |
| +20% | 504 | 16.8 d | 2.4 7d |
Assumptions & limits
Use comparable units and exclude unusable or already committed stock if relevant. This assumes steady demand and no replenishment. Seasonality, safety stock, delivery lead time and stockouts need a separate inventory policy.
Displayed results are rounded. Calculations use unrounded JavaScript numbers; small floating-point differences are possible.
Works in your browser
The interactive tool runs in a sandbox with network access blocked. ClearByte and the advertising scripts cannot read values inside it. Browser extensions and a compromised device remain outside this protection.
Sources & definitions
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