Planning calculator
Reorder Point Calculator
Translate demand, lead time, and safety stock into a clear reorder trigger for inventory planning.
What this calculator does
- Calculate reorder point from daily demand, lead time, safety stock, and current inventory.
- Use to decide when an item should be replenished before stockout risk increases.
- Calculate reorder point from daily demand, lead time, safety stock, and current inventory.
Formula used
- Lead-time demand = daily demand × lead time
- Reorder point = lead-time demand + safety stock
- Inventory gap = current inventory − reorder point
Inputs explained
- Daily demand: undefined
- Lead time: undefined
- Safety stock: undefined
- Current inventory: undefined
How to use the result
- Use to decide when an item should be replenished before stockout risk increases.
- This is a planning calculator. Validate assumptions against your process data before using the result as a final quote, schedule, or engineering decision.
Common questions
- Which inputs usually drive the reorder point result? daily demand, lead time, safety stock, and current inventory usually have the biggest effect. When one of those assumptions changes, rerun the calculator and compare the new units result before updating the plan.
- What does the reorder point calculator do? Calculate reorder point from daily demand, lead time, safety stock, and current inventory.
- What inputs do I need for the reorder point calculator? You need daily demand, lead time, safety stock, and current inventory. Use measured values from your line, quote package, supplier data, or current production plan whenever possible.
- How should I interpret the reorder point result? Treat the units output as a planning estimate for planning work. Compare it against process history, quoted assumptions, and operating limits before making final decisions.
Last reviewed 2026-05-12.