Quick answer
How do you calculate Reorder Point?
Use Reorder point = Daily demand × Lead time + Safety stock. Enter the matching values above to calculate the result instantly.
What it measures
Understanding Reorder Point
Estimate the inventory level that should trigger a replenishment order. The trigger should cover expected demand while replenishment is in transit plus a buffer for demand or supplier variability.
Interpretation
What the result means
When available inventory approaches the result, placing a replenishment order should preserve the planned safety stock.
Action
How to use it
Recalculate using recent demand and actual lead-time distributions, especially before seasonal peaks.
Limits
What it leaves out
The basic formula assumes stable average demand and does not size the purchase order or optimize service level.
The math
Reorder Point formula
Worked example
Example calculation
- Calculation
- 40 × 14 + 200
- Result
- 760-unit reorder point
Step by step
How to use this calculator
- 1Enter average daily demand, lead time, safety stock.
- 2Keep every input on the same time period and measurement basis.
- 3Review the result, then change one assumption at a time to test scenarios.
Decision support
When this calculator is useful
- Stockout prevention
- Purchase planning
- Safety-stock reviews
Common questions
Frequently asked questions
Which inputs should I use for Reorder Point?
Use average daily demand, lead time, safety stock, measured from the same source and period. Include only values that match the definitions shown beside each field.
Why might two Reorder Point calculations differ?
The systems or accounting policies may define average daily demand, lead time, safety stock differently. Compare the time period, scope, source, and treatment of exceptional items before comparing results.
How often should I recalculate Reorder Point?
Recalculate when any input changes materially and on the same reporting cadence used for the decision. Save the source and date of each input so the trend remains comparable.
Can I use Reorder Point by itself?
No single metric captures the full decision. Use the result with the related measures, assumptions, and limitations shown on this page.
Calculation reviewed: 2026-06-18. CalcPilot uses the formula shown above and tests representative values during the production build. See our methodology and correction policy.
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