What is inventory par level?
A basic inventory par level is average daily usage multiplied by the days between deliveries, plus safety stock. Using 10 units a day with a three-day delivery cycle and 10 safety units gives a par of 40 units.
See it in action.
Here's an example using the numbers already in the calculator:
- 01Gather your numbers.
Average daily usage: 10 units; Days between deliveries: 3 days; Safety stock: 10 units.
- 02Apply the formula.
Average daily usage × days between deliveries + safety stock.
- 03Review the result.
Your estimated recommended par level is 40 units. Adjust the inputs to explore your own scenario.
Make the most of your numbers.
- Use figures from the same time period and keep your units consistent.
- Update your inputs regularly as prices, demand, and operating costs change.
- Use the result as a planning guide alongside your own business context and professional advice.
Frequently asked questions.
What does the inventory par level calculator tell me?+
A basic inventory par level is average daily usage multiplied by the days between deliveries, plus safety stock. Using 10 units a day with a three-day delivery cycle and 10 safety units gives a par of 40 units.
How often should I review this number?+
Review it whenever the underlying costs or assumptions change, and compare results consistently over time. The right frequency depends on your operation.
Is this result a substitute for financial advice?+
No. This calculator is an estimate for planning and education. Check your assumptions and consult a qualified professional when making financial or compliance decisions.
