Min/Max Inventory Calculator

Free min/max inventory calculator. Enter average daily usage, lead time, and a safety buffer to get simple min and max reorder levels.

Min/Max Inventory Calculator

Get simple min and max stock levels without a full reorder-point formula. No signup required.

By Tibeau De Grauwe, FounderUpdated September 2026

  • 25 products free
  • No credit card
  • 10-min setup

The min/max method sets a simple floor (reorder at or below this) and ceiling (reorder back up to this) for a SKU, instead of running a full reorder-point and EOQ calculation.

Min/Max Inventory Calculator

Min / Max

90 / 240

Reorder at or below 90; order back up to 240

The min/max formula

Min = (average daily usage × lead time in days) + safety buffer. Max = min + typical reorder quantity. When on-hand stock reaches min, place an order that brings the total back up to max.

Min/max trades precision for simplicity compared to a calculated reorder point and economic order quantity — it works well for SKUs with fairly stable demand, and is worth revisiting as a full reorder point calculation once demand or lead time gets more variable.

See also: the min/max glossary entry, the reorder point calculator, the EOQ calculator.

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Frequently asked questions

What is the min/max inventory method?
A simple, judgment-based reorder rule: reorder when stock drops to or below a minimum level, and order enough to bring it back up to a maximum level, instead of running a full reorder-point and EOQ calculation.
Is min/max better than a reorder point formula?
Not more accurate, but simpler to set up and maintain. It works well for SKUs with fairly stable demand; a calculated reorder point is worth the extra effort for SKUs with more variable demand or lead time.