EOQ Calculator (Economic Order Quantity)
Find the order quantity that minimizes your total ordering and holding costs for inventory.
What is Economic Order Quantity?
Economic Order Quantity (EOQ) is the order size that minimizes total inventory costs — balancing the cost of placing orders against the cost of holding (storing) inventory.
How this calculator works
Enter your annual demand in units, the fixed cost to place one order, and the annual cost to hold one unit in inventory. The calculator uses the classic EOQ formula, EOQ = sqrt((2 x Demand x Order Cost) / Holding Cost), then derives how many orders you’d place per year and the typical days between orders.
The EOQ model assumes steady, known demand and constant costs, so real-world results may vary with seasonality, discounts, or lead-time changes. This tool is for general inventory planning purposes.