Stockout Probability
Calculate Stockout Probability instantly with the exact formula and a worked example.
Stockout Probability
Average daily demandpcs
Daily demand standard deviationpcs
Lead timedays
Reorder point (stock level at order)pcs
Stockout probability per cycle
5.7645%
Cycle service level
94.24%
Lead-time demand
350.0pcs
Safety stock
50.0pcs
z-value
1.575
More about: Stockout Probability
What it calculates
The “Stockout Probability” calculator computes Stockout probability per cycle in % from 4 parameters: average daily demand (pcs), daily demand standard deviation (pcs), lead time (days), reorder point (stock level at order) (pcs).
A handy everyday calculator for daily tasks.
Example calculation
With parameters Average daily demand = 50 pcs, Daily demand standard deviation = 12 pcs, Lead time = 7 days, Reorder point (stock level at order) = 400 pcs the result is 5.76 % (Lead-time demand is assumed to be normally distributed).
How to use
- Enter average daily demand, daily demand standard deviation, lead time and reorder point (stock level at order) — each field above is adjustable with a slider.
- Stockout probability per cycle (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Stockout Probability calculated?
The Stockout Probability calculator computes Stockout probability per cycle (in %) from average daily demand, daily demand standard deviation, lead time, reorder point (stock level at order). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Stockout Probability calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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