Inventory reorder point
276 units
Current position remains above the triggerHow this calculator helps
Estimate the stock position at which a replenishment order should be placed. The tool combines expected demand during supplier lead time with a separately chosen safety buffer.
How to use it
- 1
Calculate average daily demand using representative history.
- 2
Enter end-to-end lead time, not only factory production time.
- 3
Add safety stock based on variability and service goals.
- 4
Recalculate for seasonal periods and major supplier changes.
Formula and methodology
Reorder point = average daily demand × lead time in days + safety stock.
The calculator applies the displayed arithmetic to the values entered on this device. It does not silently load a local tax rate, currency conversion or commercial assumption.
Worked calculation example
Average sales of 12 units a day, 18-day lead time and 60 safety units produce a reorder point of 276 units.
Reorder point is a timing decision
The reorder point tells a business when to place an order, not how many units to buy. It estimates what will be consumed before replenishment arrives and adds safety stock. Order quantity needs separate consideration of minimums, carrying cost, cash and storage.
Apply the trigger to inventory position rather than blindly to shelf count when confirmed inbound and committed customer orders are material. Define the operational rule clearly so every team uses the same status.
Measure complete lead time
Supplier production time is only one component. Add order approval, handling, freight, customs, receiving and quality inspection. Use actual historical lead time and variation where possible rather than the fastest quotation.
Update lead time by supplier and shipping method. Averages from normal periods may fail during holidays, port disruption or capacity shortages. Safety stock should reflect uncertainty, but it cannot protect against unlimited delays.
Adjust demand for seasonality
Average daily demand should represent the period the new order must cover. A yearly average can understate a holiday peak and overstate a quiet season. Exclude stockout days carefully because recorded sales may be lower than true demand when inventory was unavailable.
Recalculate after pricing, advertising, assortment or marketplace changes. Review slow-moving and perishable stock separately. The objective is not zero stockouts at any cost, but an explicit balance among service, working capital and obsolescence.
How to interpret your result
Calculate a reorder point from average daily demand, supplier lead time and safety stock for global inventory planning. Read the main result together with the supporting values rather than treating one number as a guarantee. The disclosed method is: Reorder point = average daily demand × lead time in days + safety stock.
Input guide
Calculate average daily demand using representative history.
Enter end-to-end lead time, not only factory production time.
Add safety stock based on variability and service goals.
Scenario comparison
| Scenario | What it demonstrates |
|---|---|
| Worked baseline | Average sales of 12 units a day, 18-day lead time and 60 safety units produce a reorder point of 276 units. |
| Demand variability check | Averages hide promotions, seasonality and sudden trend changes. |
| Lead time stress test | Include production, handling, freight, customs and receiving delays. |
Common mistakes to avoid
- Ignoring demand variability: Averages hide promotions, seasonality and sudden trend changes.
- Overlooking lead time: Include production, handling, freight, customs and receiving delays.
- Failing to test stock position: Use on-hand plus confirmed inbound minus committed units where appropriate.
Repeat the calculation with verified measurements and check any decision-specific rule with the responsible provider or professional.
What can affect the result?
Demand variability
Averages hide promotions, seasonality and sudden trend changes.
Lead time
Include production, handling, freight, customs and receiving delays.
Stock position
Use on-hand plus confirmed inbound minus committed units where appropriate.
Privacy and browser processing
Your figures are processed inside this browser. SolvePilot does not receive or save the entered revenue, advertising, customer, inventory or shipping information. Close or refresh the page to clear the working session, and protect any exported or manually copied business figures appropriately.
Accuracy and verification
Use figures from matching periods, currencies and reporting definitions. Reconcile important results with store orders, advertising reports, payment settlements and accounting records. A mathematically correct ratio can still mislead when attribution, returns, tax or cost scope is inconsistent.
Limits of this estimate
The simple formula does not optimize order quantity, storage capacity, expiry, multi-location transfers or probabilistic service levels.
Sources and review information
Frequently asked questions
Is the inventory reorder point free?＋
Yes. It is free, requires no account and calculates locally in your browser.
Can I use any currency?＋
Yes. Keep all monetary inputs in the same currency. The arithmetic works with dollars, euros, pounds and other currencies without conversion.
Does SolvePilot store my store or advertising figures?＋
No. Values are processed on your device and are not submitted to a SolvePilot server.
Is this connected to my advertising or store account?＋
No. It does not access live platform data. Enter figures from the same reporting period and attribution basis.
How should I verify the result?＋
Reconcile it with your advertising, store, payment and accounting reports. Pay particular attention to demand variability, lead time, stock position.