Safety stock calculator
Plan a simple buffer or statistical safety stock.
Your result
Enter values or load an example, then calculate.
Formula & assumptions
Simple: maximum daily demand × maximum lead time − mean daily demand × mean lead time. Statistical: z × √(L × σd² + d² × σL²)
Simple method: conservative range heuristic without a promised service level. Statistical method: independent daily demand, stable means and independent demand and lead-time variation; normal approximation for lead-time demand. σ denotes standard deviation, not range. Continuous stock review; all times in days. Cycle service level describes cycles without shortage, not quantity fill rate. Intermittent demand or dependencies require another model.
Display values are rounded; calculations use no intermediate rounding. Adjust results for indivisible quantities, pack sizes and operational requirements.
Method reference: Peter L. King: Understanding safety stock (APICS, PDF).
Article planning · CSV, history & scenarios
Maintain a shared article dataset, calculate all articles and transfer it explicitly to another calculator. Data stays in this open page; no background saving.
Your article plan
Import CSV or create an article. Then complete model options and calculate all articles.