What it helps you decide
Use demand and supplier variability to create a reorder signal.
Inventory planning
Know when to reorder before production runs short.
Combine daily usage, lead-time variability, review cadence, and current stock into a practical reorder signal.
Start with the example
The values already filled in are a working example—not a recommendation.
- 1Choose the closest starting point.
- 2Replace the example with your real details.
- 3Read the live result and its important limits.
Your numbers
Demand and supplier timing
Use the filled example first. Then replace each field with a measured value or your best current estimate.
Step 1Answer one question at a time. Your example values stay available.
Important limit
Review demand and lead time regularly.
Promotions, seasonality, minimum orders, shelf life, supplier reliability, substitutions, and production schedules can justify a different buffer than historical averages.
Want to keep working with these numbers?
Inventory & Reorder Spreadsheet
Track materials and products, calculate available inventory, estimate reorder points, and create a practical purchase list.
About this free operations & wholesale tool
How to use the Reorder Point & Safety Stock Calculator
Use demand and supplier variability to create a reorder signal. The calculator runs privately in your browser and is designed to make the assumptions behind the answer visible.
What to have ready
Gather demand, lead time, case or pallet rules, capacity, setup time, freight terms, inventory position, and the cost of the proposed order.
Key inputs: Average daily use; Peak daily use; Average supplier lead time; Longest expected lead time; Days between inventory reviews.
How to use the result
Use the result to set a reorder, production, freight, or wholesale starting point, then check physical constraints, cash timing, and customer terms.
Complete workflow guide
Inventory and traceability
A stock count tells you how much is on the shelf. Traceability explains how it arrived, which batch used it, and which customers received the finished product.
Learn the workflow
Helpful guides for this calculator
Inventory & TraceabilityHow to Set a Reorder Point When Demand Is Messy
Use baseline consumption, demand scenarios, observed supplier lead time, open supply, and a review trigger instead of searching for one magical number.
Read the guide →Inventory & TraceabilityYour Supplier Went Silent: A 48-Hour Continuity PlanStabilize open orders, calculate stock coverage, qualify alternatives, control substitutions, and communicate before silence becomes a customer crisis.
Read the guide →Inventory & TraceabilityYour Inventory Is Lying to You: Available, Committed, Damaged, and Work in ProgressReplace one misleading on-hand number with inventory states that support real purchasing, production, and customer promises.
Read the guide →Ready for the connected version?
Turn the calculation into a repeatable workflow.
Batch Scale connects recipes, materials, costs, inventory, production, sales, and your storefront in one workspace.