Inventory Reorder Calculator
Calculate when to reorder inventory using daily sales, supplier lead time, safety stock, and current units on hand.
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Inventory Reorder Calculator
Calculate when to reorder inventory using daily sales, supplier lead time, safety stock, and current units on hand.
Formula: demand during lead time plus safety stock minus units on hand.
What this tool does
This calculator shows whether current inventory covers supplier lead time plus safety stock. It is built for ecommerce operators who need a reorder checkpoint before stockouts turn into a very expensive shrug.
How to use it
Use recent average daily sales, not launch-week spikes. Lead time should include supplier production, freight, receiving, and buffer days. Safety stock is the cushion you want to keep after expected lead-time demand.
How to use the result
A result of zero means you have enough coverage for the inputs provided. A positive result is the unit gap to cover before reorder risk gets uncomfortable. Pair this with a profit calculator view so you do not reorder a SKU that sells well but contributes little cash.
Recommended Next Step
Try ProfitCalc free to see your real store profit before you choose an accounting stack. Use this inventory checkpoint, then compare the reorder against ProfitCalc and your profit calculator workflow before committing cash.
Next step
Launch Your Ecommerce Store for Just $1
Build your professional ecommerce store with Shopify - get all the tools, templates, and support needed to launch and grow your online business successfully.