Par Level Calculator
The standing stock level to replenish back to.
Par level
60
40 usage + 20 buffer
Par suits regular deliveries and predictable usage. Review quarterly — stale par levels are a common cause of persistent overstock.
How the Par Level Calculator works
A par level is the quantity you top back up to each cycle rather than a trigger to order. It suits businesses with regular deliveries and predictable usage — hospitality, salons, clinics — where counting to a target is simpler than tracking reorder points.
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Frequently asked questions
How is a par level calculated?
(Average usage per period × periods between deliveries) + safety stock. Using 40 units a week with weekly delivery and a 20-unit buffer gives a par level of 60.
How does par level differ from reorder point?
A reorder point triggers an order when stock falls to it. A par level is the target you top up to on a fixed schedule. Par suits regular deliveries; reorder points suit ordering when needed.
How often should par levels be reviewed?
Quarterly, and after any change in usage or delivery frequency. Par levels set once and left alone are the most common cause of both persistent overstock and recurring shortages of the same item.
What if usage is seasonal?
Set seasonal par levels rather than one annual figure. A single par level across a seasonal business overstocks in the quiet period and runs short in the busy one, every year.