Free CPG Calculator

Estimate inventory
weeks of supply.

Compare on-hand units with weekly demand, production lead time, and safety stock to identify a directional reorder gap.

Inventory Planning

Weeks of supply

Estimate inventory coverage and whether stock reaches the desired reorder buffer.

Enter your inputs, then calculate.
DIRECTIONAL COVERAGE · EXCLUDES OPEN PURCHASE ORDERS AND DEMAND VARIABILITY
What the Result Tells You

Use the output as a starting point.

  • Current weeks of supply at the stated demand rate
  • Coverage required for lead time plus safety stock
  • A directional surplus or reorder gap
Use With Care

Document the assumptions.

This simplified calculation excludes open purchase orders, inbound inventory, demand variability, shelf life, lot constraints, and retailer-specific allocations.

Next Step

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