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InventoryVerified formula

Reorder Point & Safety Stock Calculator

Balance stockout risk against excess inventory using demand and lead-time ranges.

Free · no sign-upInputs stay in this browser
Decision inputs
Adjust the example values to match one product, order, shipment, or planning period.
Live result Deterministic
Decision summary
Calculated from the visible formula and assumptions on this page.

Your result will appear here

Edit the example and calculate. No account is required.

How to use this tool

A decision, not just an output

Estimate safety stock and the stock level that should trigger replenishment. Read the output alongside its interpretation, assumptions, limitations, and source. Marketplace rates and external requirements should always be confirmed at the linked official source.

Formula & example

Transparent method

Safety stock = maximum usage during maximum lead time − average lead-time demand; reorder point = average lead-time demand + safety stock.

Example: 10 units/day over 5 days with a 15-unit maximum and 8-day maximum lead time yields 70 safety units and a 120-unit reorder point.

Assumptions

  • • Demand and lead-time maxima reflect a meaningful planning period.
  • • The formula is a simple maximum-usage model.

Limitations

  • • Service-level probability and demand distribution are not modeled.

Frequently asked questions

Is the Reorder Point & Safety Stock Calculator free?

Yes. The primary result is available without creating an account or entering an email address.

How is the result calculated?

Safety stock = maximum usage during maximum lead time − average lead-time demand; reorder point = average lead-time demand + safety stock.

What should I verify before using it?

Service-level probability and demand distribution are not modeled.

Are my inputs private?

Core inputs are processed in your browser. ShipMargin records anonymous tool interaction events, not the business values entered into this form.