When should I place my next order?
Know exactly when to restock so your next best seller never goes out of stock. Compare the trigger with inventory position: on-hand plus confirmed incoming units minus backorders. A reorder point tells you when to buy; it does not determine how many units to order.
The formula, explained.
Reorder point = daily demand × lead time + safety stock Estimated safety stock = maximum demand × maximum lead time − average demand × average lead time
A worked example
How to interpret your result
Compare the trigger with inventory position: on-hand plus confirmed incoming units minus backorders. A reorder point tells you when to buy; it does not determine how many units to order.
Common mistakes to avoid
Using supplier production time alone misses transit and receiving delays. The maximum-based safety estimate is a planning shortcut, not a guaranteed service level.
Frequently asked questions
What does this result include?
The result includes the inputs shown above and any advanced costs you enter. The reorder point is a stock trigger, not an order quantity. Check the formula and cost breakdown for the exact scope.
Can I change the assumptions?
Yes. All inputs can be edited, and advanced assumptions are available below the main inputs. Use values from the same period and currency. Changing display currency changes the symbol, not the underlying amount.
Are my financial numbers saved?
No. Calculations happen locally in your browser. Sharing creates a link containing the inputs, and exporting saves a CSV report to your device. You choose whether to share those artifacts.
Learn more about our calculation methodology and estimate limitations.