Browser-local worksheet
Enter your inputs
Nothing is uploaded or saved
How to use it
A short, reviewable workflow
- 01
Enter average units consumed per day.
- 02
Enter average replenishment lead time in matching calendar or working days.
- 03
Add an independently chosen safety-stock quantity.
Useful for
Common use cases
- Setting min/max parameters
- Reviewing reorder alerts
- Documenting a simple replenishment rule
Important boundary
What this result cannot decide
A reorder point can fail if inventory records, demand, lead time, open-order data, or the chosen safety stock are wrong.
Model notes
Assumptions and limitations
Assumptions
- Daily demand and lead-time units are aligned.
- Open orders and inventory accuracy are handled outside the formula.
- Safety stock is supplied by the user.
Limitations
- Does not derive service-level safety stock.
- Demand and lead-time variability are not directly modeled.
- Order quantity is not calculated.
Questions
Frequently asked
Is reorder point the same as order quantity?
No. It is the inventory-position trigger for ordering; EOQ or another policy can determine quantity.
Should I use calendar days?
Use the same basis for demand and lead time. If lead time uses working days, daily demand must too.