Inventory Reorder Point Calculator
Enter your average daily usage, supplier lead time and desired safety stock to find the inventory reorder point.
Inventory Reorder Point Calculator
Calculates the inventory level at which you should reorder stock, based on daily usage, lead time and a safety stock buffer.
This calculator uses the standard reorder point formula — average daily usage multiplied by supplier lead time, plus a safety stock buffer — to tell you exactly what inventory level should trigger a new purchase order. Getting this number right helps avoid both stockouts (running out before the new order arrives) and excess holding costs from reordering too early, and it's a core building block of basic inventory management systems.
Example
- With the default values shown above, this calculator returns: Reorder Point ≈ 170 units.
Frequently Asked Questions
What is a reorder point?
It's the inventory level at which you should place a new purchase order, sized so that stock doesn't run out while waiting for the new order to arrive.
Why include a safety stock buffer?
Safety stock protects against unexpected spikes in demand or delays in supplier delivery — without it, any variability beyond your average usage or lead time could cause a stockout.
Sources
- Standard formula, publicly documented method