Free inventory calculators

These free inventory calculators help you decide when to reorder, how much buffer to hold and how much to order.

  • Reorder point calculator

    Find the stock level at which to place your next order: daily demand × lead time + safety stock.

  • Safety stock calculator

    Turn demand swings, lead time and a service level into a buffer: z × σ × √lead time.

  • EOQ calculator

    Find the order size with the lowest ordering plus holding cost.

Free inventory calculators: reorder point, safety stock and EOQ. Each runs in your browser, nothing is uploaded, and each links to the formula in our playbook.

Sources checked: .

Each calculator uses one standard formula, shows a worked example and says when the formula breaks. They run in your browser. Nothing you type is uploaded or tracked.

Which one first?

Start with safety stock, then the reorder point, then EOQ. Safety stock sets the buffer. The reorder point tells you when to order. EOQ tells you how much.

FAQ

Frequently asked questions

Yes. They are free and need no sign-up.

No. Each calculation runs in your browser. Nothing is uploaded, stored or tracked.

They handle one item at a time. For a whole catalog, inventory optimization software runs the same math for every SKU from your own sales data.

Start with safety stock, then the reorder point, then EOQ. Each one feeds the next.

Start with your workflow

Bring one inventory, purchasing or order-management problem. We will map the required data, demonstrate the relevant workflow and identify what needs configuration or further validation.

Book a demo