Safety Stock Calculator
Calculate the right buffer stock to protect against demand spikes and supplier delays. Free, instant.
Reorderly connects to your Shopify store and handles this automatically — 24/7, without you touching it.
Frequently asked questions
What is safety stock?
Safety stock is extra inventory held as a buffer against unexpected demand spikes or supplier delays. It's the difference between running out of stock and staying in business through supply chain disruptions.
How much safety stock should I hold?
It depends on the variability of your demand and supplier lead times. Higher variability = more safety stock needed. The simple method above (max demand - average demand) is a good practical starting point for most Shopify merchants.
Is holding safety stock expensive?
There's a cost to holding excess inventory (typically 20–30% of inventory value annually for carrying costs). But the cost of a stockout — lost sales, customer churn, ad waste — almost always exceeds the carrying cost of safety stock.