Online Tool Store
Safety Stock Calculator
Enter max and average demand and lead time to calculate recommended safety stock using the max-min formula. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Safety stock
Example shown — replace it with your own demand and lead time figures.
How it works
- Enter your max and average daily demand.
- Enter your max and average supplier lead time.
- See the recommended safety stock level instantly.
Calculation applies the max-min formula: (max demand × max lead time) minus (average demand × average lead time) — a standard inventory management method for sizing a demand and lead-time buffer.
FAQ
Is my inventory data uploaded anywhere?
No. The calculation happens entirely in your browser — nothing is sent to a server.
What is safety stock?
Extra inventory held to buffer against unexpected spikes in demand or delays in supplier lead time, so you don't run out of stock.
How is it calculated?
Using the max-min formula: (max daily demand × max lead time) − (average daily demand × average lead time) — a standard method that accounts for variability in both demand and supply.
Is more safety stock always better?
No — too much ties up cash and warehouse space. Safety stock is a balance between stockout risk and holding cost.
How we compare
| Feature | Online Tool Store | Manual spreadsheet formula | Inventory management software |
|---|---|---|---|
| No formula to remember | ✓ | Easy to get the formula wrong | ✓ |
| Free, no account | ✓ | ✓ | Often subscription-based |
Full inventory software is the right call for ongoing operations. Safety Stock Calculator is for the quick, one-off estimate — no account needed.