Business
Inventory reorder point
Estimate when to reorder from demand during lead time plus safety stock.
Calculators / Business / Stock coverage at a daily rate
Stock coverage at a daily rate calculator
Estimate how many days usable inventory lasts at a supplied daily demand.
On this page
Stock coverage15days
Stock after lead-time demand150
Lead-time demand300
Calculator controls
How to calculate
Estimate how many days usable inventory lasts at a supplied daily demand.
Stock coverage =
stock/daily daysStock after lead-time demand =
stock-daily*leadLead-time demand =
daily*leadWorked example
- Usable stock units: 450
- Expected daily demand: 30
- Lead time (days): 10
- Stock coverage: 15 days
- Stock after lead-time demand: 150
- Lead-time demand: 300
Assumptions and limits
Demand and lead time are constant assumptions. Negative stock after lead time indicates a shortfall; uncertainty and reorder buffers are excluded.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate how many days usable inventory lasts at a supplied daily demand. Divide stock by demand per day. Compare the resulting days with supplier lead time before considering a safety buffer.
When this tool is useful
Divide stock by demand per day. Compare the resulting days with supplier lead time before considering a safety buffer.
Understanding your inputs
| Input | Example |
|---|---|
Usable stock units stock | 450 |
Expected daily demand daily | 30 |
Lead time (days) lead | 10 |
Frequently asked questions
What does this estimate leave out?
Demand and lead time are constant assumptions. Negative stock after lead time indicates a shortfall; uncertainty and reorder buffers are excluded.
How do I check the example?
Use the stated units and the formula below. Keep full precision until the final answer; change one input at a time to see its effect.