Safety Stock Calculation – Buffer for Your Shop
Safety stock is extra inventory you keep to avoid stockouts when demand spikes or the supplier is late. Part of our inventory management guide.
Simple Formula
Safety stock = (Max daily sales × Max lead time) − (Avg daily sales × Avg lead time)
Example: Avg 10 units/day, max 20. Avg lead time 3 days, max 7.
Safety stock = (20 × 7) − (10 × 3) = 140 − 30 = 110 units.
Why You Need It
- Demand variation – Some days sell much more
- Lead time variation – Suppliers sometimes deliver late
- Festivals and seasons – Sudden spikes
How Much Is Enough?
Too little → stockouts, lost sales. Too much → excess capital, expiry risk. Start with the formula, then adjust based on experience.
Add to Reorder Point
Reorder point = (Lead time × Daily sales) + Safety stock.
Use our Safety Stock Calculator. Stockkeeper’s low-stock alerts factor in your buffer. Join the waitlist.
Frequently Asked Questions
What is safety stock?
Safety stock is extra inventory kept to avoid stockouts when demand spikes or suppliers deliver late.
How do I calculate safety stock?
Safety stock = (Max daily sales × Max lead time) − (Avg daily sales × Avg lead time).
How much safety stock do I need?
Start with the formula. Too little causes stockouts; too much ties up capital. Adjust based on experience.