Safety Stock Calculator
How much extra stock to keep for demand spikes and supplier delays.
From our inventory management guide.
Peak day or highest observed
Worst-case supplier delay
Safety stock = (Max daily × Max lead time) − (Avg daily × Avg lead time). Keeps you from stockouts when demand spikes or delivery is late.
How to use
- Enter average daily demand and variation.
- Enter lead time in days.
- Get recommended safety stock.
Formula
Safety Stock = Z × σd × √L. Z=service factor, σd=daily demand std dev, L=lead time days.
Related articles
FAQs
What is safety stock?
Extra stock kept to avoid stockouts when demand or supply varies. Buffer for uncertainty.
How much safety stock to keep?
Depends on demand variation and lead time. Formula: Z × σ × √L. Z=service level, σ=demand std dev, L=lead time.
Low-stock alerts with buffer
Stockkeeper lets you set reorder points with safety stock built in. Never run out during peak demand.
Join the waitlist