The Free Lead Time Generator Built for Real Supply Chains
Lead Time Generator is a purpose-built calculator that helps procurement, operations, and supply chain teams turn order dates into accurate delivery estimates — with business days, holidays, and every stage in between.
How Lead Time Generator Became Essential
From a simple frustration with inaccurate delivery estimates to a tool trusted by supply chain teams worldwide.
Supply chain teams everywhere were stuck using bloated ERP modules, fragile spreadsheets, or back-of-the-envelope math to estimate delivery dates. Small mistakes in lead time calculations cascaded into missed deadlines, excess inventory, and frustrated customers.
We watched procurement managers toggle between three browser tabs just to convert weeks into business days, skip holidays, and arrive at a realistic delivery date. They deserved a single, purpose-built tool that handled all of that in one place — instantly and for free.
Lead Time Generator was engineered from the ground up to be fast, private, and comprehensive. We mapped real-world procurement workflows — supplier processing, production runs, ocean freight, customs, receiving — and turned them into a clean, stage-by-stage calculator that anyone can use in seconds.
Teams across manufacturing, construction, e-commerce, logistics, and project management rely on Lead Time Generator every day to plan orders, set reorder points, negotiate with suppliers, and promise realistic delivery dates to their customers.
Our Mission
We believe accurate lead time estimation should not be locked behind expensive ERP licenses, complex spreadsheet formulas, or enterprise software that takes months to implement.
Lead Time Generator exists to give every buyer, planner, project manager, and operations lead a fast, reliable way to calculate delivery dates — whether they manage a three-person team or a global supply chain.
Why Lead Time Accuracy Matters
A single miscalculated lead time can trigger a chain reaction: stockouts that halt production lines, rush shipping costs that destroy margins, or customer promises that fall apart on delivery day.
Lead Time Generator addresses this by modeling every stage — supplier response, production, transit, customs, receiving — and factoring in weekends, holidays, and buffer days so your estimates match reality, not best-case assumptions.
What Makes Lead Time Generator Stand Out
Every design decision was made to give supply chain professionals the fastest, most reliable lead time calculations possible.
100% Free, Forever
No subscriptions, no trials, no hidden costs. The lead time generator is completely free for individuals and teams of every size.
Privacy by Design
Every calculation runs entirely in your browser. Your dates, scenarios, and supply chain data never leave your device.
Instant Results
Results update in real time as you adjust stages, toggle weekends, or add holidays. Zero waiting, zero page reloads.
Full Stage Coverage
Model every phase — supplier processing, production, transit, customs clearance, receiving, inspection, and buffer days.
Save & Compare
Save unlimited scenarios and compare them side by side so you can evaluate suppliers, shipping modes, and trade-offs at a glance.
Works on Any Device
Fully responsive across desktop, tablet, and mobile. Run lead time calculations from the office, the warehouse floor, or on the go.
Who Uses Lead Time Generator
From solo buyers placing their first international order to enterprise teams managing thousands of SKUs.
🏭 Manufacturing & Production
Production schedulers and MRP planners who need to align raw material arrivals with production runs to avoid line stoppages.
📦 Procurement & Purchasing
Buyers and sourcing teams who compare supplier lead times, set reorder points, and negotiate delivery commitments.
🚚 Logistics & Shipping
Freight coordinators and import managers modeling transit durations across air, sea, and ground with customs and port clearance.
🏗️ Construction & Projects
Project managers and contractors coordinating long-lead materials, trade schedules, and milestone deliveries across complex builds.
Ready to Generate Your Lead Time?
Start calculating accurate delivery dates right now. No sign-up, no downloads — just open the calculator and go.
Start Calculating