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Reorder Point Calculator

Calculate replenishment triggers from daily demand, lead time and safety stock; compare inventory position.

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Daily Uses

8 of 8 free uses remaining today

Calculate when to replenish stock using daily demand, supplier lead time and a safety buffer. Compare the threshold with your inventory position.

Enter your business figures

Use a representative daily sales or consumption rate.

Include ordering, production, shipping and receiving delays.

Enter your chosen buffer, not all stock on hand.

Physical usable stock currently available.

Include confirmed incoming stock only.

Demand already allocated but not yet fulfilled. Do not double-count it.

Each successful calculation uses one of this tool’s 8 daily free uses. Editing, resetting and invalid inputs use none. Your figures remain in your browser.

Worked example

Example output from the starting values. Enter your figures and press Calculate for your result.

Demand during lead time
140 units
Reorder point
200 units
Inventory position
130 units
Position above / below trigger
-70 units
Replenishment review
At or below trigger — review replenishment

Formula

Lead-time demand = daily demand × lead-time days. Reorder point = lead-time demand + safety stock. Inventory position = on hand + on order − backorders.

How to use this calculation

20 units/day × 7 days + 60 safety units = a 200-unit reorder point. With 120 on hand, 20 on order and 10 committed, the inventory position is 130 units.

  • Trigger review when inventory position reaches or falls below the threshold. The result is a trigger, not a recommended order quantity.
  • The threshold is rounded up to whole units. Incoming inventory must arrive in time; seasonal demand or uncertain lead times can require a different policy.
  • The calculation is a planning estimate, not an automated purchasing instruction. No order is placed.

Formula reference: Oracle Inventory: Reorder Point Planning. General planning information, not a guarantee of business results.

Estimate your buffer with the Safety Stock Calculator

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