Resources / Free tools
Simple inventory tools.
Clearer stock decisions.
Five free calculators. No sign-up, no card and no software to install. Learn the formula, try your own numbers and share a result only when you choose.
Dead Cash Calculator
Estimate cash tied up in idle inventory and its holding cost.
Calculate free →Safety Stock Calculator
Estimate your inventory buffer from daily demand variation, fixed lead time and target service level. Free safety stock calculator with formula and example.
Calculate free →Reorder Point Calculator
Calculate when to reorder from average daily demand, lead time and safety stock. Free inventory calculator with a clear formula, example and sharing.
Calculate free →EOQ Calculator
Find economic order quantity using annual demand, ordering cost and annual holding cost per unit. Free EOQ calculator with assumptions and a worked example.
Calculate free →Inventory Turnover Calculator
Calculate annual inventory turnover and days of inventory using cost of goods sold and average stock at cost. Free calculator with formula and example.
Calculate free →Check your stock list, free
Create a free toolkit account to analyse up to 100 items from Excel or CSV. Get ABC classes, dead-stock candidates and reorder points. Your stock file is processed in your browser, not uploaded to SCMSigma or an AI service.
Open the 100-item stock check →For planners, classrooms and small businesses
Use these tools in inventory reviews or supply-chain lessons. Each calculator includes its method, assumptions and a worked example. You can link directly to any tool.
Are these tools free?
Yes. The five calculators need no account. The 100-item stock check needs a free account. Full SCMSigma workspace subscriptions are separate.
Will my result be public?
No. Calculations stay in your browser. Sharing a result is optional and shows only the text you choose to share.
Read the inventory planning guide