Economic Order Quantity (EOQ) Calculator
EOQ · cost breakdown · reorder point · quantity discounts
Core Inputs
Holding Cost — H
Reorder Point (optional)
Price Tiers
Each tier: minimum order quantity to qualify, and the unit price at that quantity. The tool finds the true lowest total cost (purchase + ordering + holding).
Result
Enter annual demand, ordering cost and holding cost to get the economic order quantity, the ordering-vs-holding cost breakdown, a nearby-quantity comparison, the reorder point and orders per year — or switch to quantity-discount mode to test price breaks
The classic EOQ model assumes steady demand, a fixed ordering cost, a constant holding cost and instant replenishment — real demand varies, so treat EOQ as a strong starting point rather than an exact optimum. At the EOQ the ordering and holding costs are equal, which is why the total-cost curve is flat near the minimum: order quantities somewhat above or below the EOQ cost almost the same, giving you practical flexibility. In quantity-discount mode the cheapest tier is not always the lowest unit price, because a large minimum order raises holding cost — the tool compares the genuine total. The carrying cost rate here is exactly the H input; the Inventory Carrying Cost Estimator can help you build it up from its components.