Reorder point and safety stock calculator
Know when to place your next order with the supplier: reorder point, safety stock, days of coverage and economic order quantity.
How to useReorder point and minimum stock
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Reorder point and safety stock calculator: what it is for
Enter the average daily usage, the supplier's lead time and the safety days. The calculator shows the reorder point, safety stock, how long current stock will last and in how many days to place the next order. With the cost of each order and of storage, it also calculates the economic order quantity (EOQ).
How to use
- Enter usage, lead time and safety days.
- Enter current stock.
- See when and how much to buy.
When to use it
- Avoiding stockouts in the store.
- Planning supply purchases.
- Reducing money tied up in inventory.
Frequently asked questions
How do I calculate the reorder point?
Reorder point = average daily usage × supplier lead time (in days) + safety stock. When stock reaches that number, it's time to buy.
How much safety stock should I keep?
A simple rule is to cover a few extra days of sales, for supplier delays or demand spikes. Products you can't run out of deserve a bigger buffer.
What is the economic order quantity?
It's the quantity per order that balances the cost of placing orders (shipping, time) and the cost of holding inventory. The formula is √(2 × annual demand × cost per order ÷ annual holding cost per unit).
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.