Reorder point calculator
The stock level at which you place the next order.
How it works
Reorder point = average daily demand × lead time (days) + safety stock
The first term is how much you will sell while you wait for the delivery; the second is the cushion for when demand or the supplier misbehaves. Order when stock touches the total and, if nothing goes wrong, the delivery arrives as you reach the safety stock. Results round up: a reorder point of 337.2 means ordering at 337 leaves you short.
This tool runs entirely in your browser. Nothing you type is sent to a server, stored or logged.
Frequently asked questions
- How do I set safety stock?
- A common starting point is the demand of half a lead time, then tune it against how often you actually run out. If your supplier is reliable and demand is steady, it can be small.
- What period should daily demand cover?
- Long enough to be representative and recent enough to be true — usually the last 30 to 90 days. If you are seasonal, use the coming season, not the annual average.
- Should lead time include my own processing?
- Yes. Count from the moment you decide to order to the moment the stock is sellable, including approval, transit and putaway. Leaving out the internal steps is why reorder points run late.
- Does this handle variable lead times?
- Not directly. Use your longest realistic lead time, or carry the variability in safety stock — that is what safety stock is for.