Free business calculator
Inventory Reorder Service-Level Calculator
Estimate a reorder point that covers average lead-time demand plus safety stock.
- Instant results
- Private in your browser
- PDF report included
Use the result well
A clear answer, with the assumptions visible
These recommendations turn the result into an operational next step without hiding the inputs behind a score.
- 1
Order early enough for real supplier lead times.
- 2
Track delays and demand spikes separately from ordinary variation.
- 3
Include stock already ordered before placing another order.
How this tool works
- Multiply average daily demand by supplier lead days.
- Use jStat’s normal percentile for the chosen coverage target.
- Add lead-time safety stock based on daily demand spread.
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