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Inventory Reorder Point from Lead Time and Demand Calculator

Minimum stock level that triggers a replenishment order.

Calculates the reorder point ROP = (average daily demand) × (lead time in days) + safety stock, ensuring stock does not run out before a new order arrives.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

units/day
days
units

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ROP = D_avg · LT + SS

In depth

Calculates the reorder point ROP = (average daily demand) × (lead time in days) + safety stock, ensuring stock does not run out before a new order arrives.