(Max Daily Sales x Max Lead Time) - (Avg Daily Sales x Avg Lead Time)Inventory calculator
Safety Stock Calculator
Estimate buffer stock using max and average demand and lead time.
Your figures stay on this device
Under the hood
Understand the number
Use the formula and notes below to check whether the result fits your real operating conditions.
- Max Daily Sales
- Highest expected daily demand.
Enter a realistic current order or SKU, then compare the result with your target.
Change one variable at a time to see which operational lever matters most.
This tool is for planning and education. It is not financial, tax, legal or carrier rating advice. Rounding uses two decimal places unless the result is naturally a unit count.
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FAQ
Are my inputs stored?
No. Calculator inputs run in your browser and are not submitted.
When was this checked?
Last reviewed on August 25, 2026. Changing third-party fees should be verified from official sources.
Sources
For carrier dimensional weight and marketplace fees, verify current official documentation before operational use.