Inventory Reorder Point Calculator
Set a replenishment trigger using demand, lead time and an entered safety-stock buffer.
Your result
FINANCIALEnter your values and select calculate.
On this page How it works & practical examples
How to use the Inventory Reorder Point Calculator
Use matching daily demand and lead-time definitions. The trigger estimates stock required during replenishment plus a buffer you supply. It answers when to reorder, whereas economic order quantity answers how much to order.
The calculation
Worked example
20 units/day over a seven-day lead time plus 50 safety units gives a 190-unit trigger.
Assumptions and limits
Demand and lead time are treated as constant. This page does not estimate a statistical service level or account for stock already on order, shortages, seasonal peaks or multiple suppliers.
Common questions
Does this tell me the purchase quantity?
No. It gives a trigger level. Order quantity depends on costs, minimums and your inventory policy.
Is safety stock calculated automatically?
No. Enter a buffer justified by your observed variability and service requirements.