Safety Stock Calculator
Calculate buffer inventory needed to prevent stockouts.
Inputs
units
units
days
days
%
$
Results
Safety Stock (Combined Method)
345 units
Safety Stock (Simple Method)104 units
Safety Stock Value$5,175.87
Days of Safety Coverage3.5 days
Annual Holding Cost$1,293.97
Z-Score1.65
How to Use This Calculator
- Enter the average daily demand and the standard deviation of daily demand.
- Input the average lead time in days and the standard deviation of lead time.
- Set the service level (e.g., 95%) to determine the Z-score.
- Review the recommended safety stock quantity.
- Higher service levels require proportionally more safety stock — balance fill rate against holding cost.
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