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Inventory Tool

Reorder Level Calculator — Never Run Out of Stock Again

Calculate the exact stock level to trigger a replenishment order, including safety stock for demand variability.

Use the Calculator

Formula & How It Works

Safety Stock = (Max Daily × Max Lead) − (Avg Daily × Avg Lead)
Reorder Level = (Avg Daily × Lead) + Safety Stock

Worked Example

Avg 50/day, Lead 7d, Max 80/day, Max Lead 12d → Safety 610 → ROL 960 units

When to Use This Calculator

  • Set automatic reorder alerts
  • Prevent stockouts in peak season
  • Calculate per-SKU reorder points

Frequently Asked Questions

Stock level at which a new purchase order must be placed.
Buffer inventory to protect against demand spikes or delays.
Days between placing an order and receiving goods.
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