Calculators

Reorder Point and Safety Stock Calculator

Model a stock trigger from independent daily demand, fixed lead time, and a supplied service z-score.

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Result

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How to use Reorder Point and Safety Stock Calculator

Safety stock is z×daily SD×sqrt(lead days); reorder point adds mean demand over lead time.

Enter mean daily demand, daily demand sd, fixed lead time (days), service z-score.
Check the model, units, and supported limits before calculating.
Run the tool, inspect the result, then copy or download it.

Nonnegative demand/SD and z 0–6; fixed positive lead time up to 3660 days. Normal independent-demand approximation, no guaranteed fill rate.
Runs locally. Numeric inputs are bounded; floating-point output is approximate and rounded to 12 significant digits. Unsupported or non-finite calculations produce an error.
Educational user-assumption arithmetic only. No live rates, tax rules, financial advice, or outcome guarantees.

How does Reorder Point and Safety Stock Calculator calculate its result?

Safety stock is z×daily SD×sqrt(lead days); reorder point adds mean demand over lead time.

What assumptions and boundaries apply?

Nonnegative demand/SD and z 0–6; fixed positive lead time up to 3660 days. Normal independent-demand approximation, no guaranteed fill rate.

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