Re-Order Point and Re-Order Quantity Calculator

How to Use the Re-Order Point and Re-Order Quantity Calculator

This calculator helps you make a practical decision about how much stock to hold for a spare part.

It does this in two stages:

1. Re-Order Point – which tells you when to place an order.
2. Re-Order Quantity – which helps you decide how much to order.

The calculator uses the approach described in this Practitioner Digital Library white-paper

The approach is deliberately simple.
It does not rely on statistical formulas or assumptions about normal demand. That matters because spare parts demand is often irregular, low-volume, and driven by maintenance events rather than steady customer demand.