Reorder Point
Calculator
Results
- Reorder point (units)
- 2,360
- Lead-time demand (units)
- 2,160
- Safety stock coverage (days)
- 1.111111
Results
| Reorder point (units) | 2,360 |
| Lead-time demand (units) | 2,160 |
| Safety stock coverage (days) | 1.111111 |
formula-map diagram
- Reorder point (units)
- 2,360
- Lead-time demand (units)
- 2,160
- Safety stock coverage (days)
- 1.111111
Diagram
Formula
ROP = average daily demand × lead time + safety stock= 2360
Note
This is a simplified model using standard logistics formulas; real-world contracts, carrier rules, and regulations may add further terms.
More in Logistics and shipping
See all →Frequently asked questions
What is the reorder point and what does this calculator find?+
The reorder point is the inventory level at which you should place a new purchase order so that the replacement stock arrives just as your current stock runs out (or right before).
What inputs are needed?+
Average daily demand (usage rate), average lead time (days it takes for a new order to arrive), and safety stock (buffer inventory for variability).
What's the formula?+
Reorder Point = (Average Daily Demand × Lead Time) + Safety Stock. This covers expected demand during the lead time, plus a buffer for unexpected variation.
Why do I need safety stock in this formula if I already know my lead time?+
Lead time and demand are rarely perfectly constant in practice — a supplier delay or demand spike during the lead time window could cause a stockout without a buffer, which is exactly what safety stock protects against.
What happens if demand or lead time changes after I set my reorder point?+
The reorder point should be recalculated whenever demand patterns or supplier lead times shift meaningfully — a reorder point set during slow season will likely trigger orders too late once demand picks up.