Reorder Point Calculator
The Reorder Point Calculator tells you the exact stock level at which you must place a new purchase order to avoid running out of inventory. Enter your average daily demand, supplier lead time, and desired service level to calculate your reorder point — including safety stock for demand spikes or delivery delays. Whether you manage a Shopify store, warehouse, or retail operation, knowing your reorder point eliminates stockouts and reduces emergency ordering costs. Free, instant, no sign-up needed.
Studies show over a third of inventory stockouts can be prevented with proper reorder point tracking and safety stock
Rush orders placed after a stockout typically cost 2 to 4 times more than planned orders placed at the reorder point
A 95% service level (Z = 1.65) is the industry standard for most product categories — meaning you have stock available 95% of order cycles