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Safety Stock (Service level, Average daily demand)

Calculate Safety Stock instantly with the exact formula and a worked example.

Safety Stock

Service level%
Average daily demandpcs
Daily demand standard deviationpcs
Average lead timedays
Lead time standard deviationdays
Safety stock
95.9106pcs
If lead time is fixed, set its deviation to 0Calculate Safety Stock instantly with the exact formula and a worked example.
z-value
1.645
Lead-time demand σ
58.31pcs
Reorder point (ROP)
545.9pcs

More about: Safety Stock (Service level, Average daily demand)

What it calculates

The “Safety Stock (Service level, Average daily demand)” calculator computes Safety stock in pcs from 5 parameters: service level (%), average daily demand (pcs), daily demand standard deviation (pcs), average lead time (days), lead time standard deviation (days).

A handy everyday calculator for daily tasks.

Example calculation

With parameters Service level = 95 %, Average daily demand = 50 pcs, Daily demand standard deviation = 10 pcs, Average lead time = 9 days, Lead time standard deviation = 1 days the result is 95.91 pcs (If lead time is fixed, set its deviation to 0).

How to use

  1. Enter service level, average daily demand, daily demand standard deviation, average lead time and lead time standard deviation — each field above is adjustable with a slider.
  2. Safety stock (pcs) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Safety Stock (Service level, Average daily demand) calculated?
The Safety Stock (Service level, Average daily demand) calculator computes Safety stock (in pcs) from service level, average daily demand, daily demand standard deviation, average lead time, lead time standard deviation. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Safety Stock (Service level, Average daily demand) 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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