Built for Supply Chain Professionals
LeadTime Calculator is a free, open-source tool designed to help operations, purchasing, and supply chain teams calculate lead times with precision and confidence.
Our Mission
We believe every procurement and supply chain professional deserves access to powerful, accurate calculation tools — without paywalls, subscriptions, or complicated software.
LeadTime Calculator was built to democratize supply chain planning, making it easy for teams of any size to estimate delivery timelines, compare scenarios, and make data-driven procurement decisions.
Why We Built This
Procurement planning shouldn't require expensive ERP systems or complex spreadsheets. We saw teams struggling with inconsistent lead time estimates, missed delivery dates, and excess inventory costs.
Our calculator addresses these challenges head-on with an intuitive, real-time tool that factors in weekends, holidays, shipping modes, and buffer time — all in one place.
What Makes Us Different
100% Free
No subscriptions, no hidden fees. Our calculator is free to use, forever.
Privacy First
All calculations happen in your browser. Your data never leaves your device.
Real-Time
Results update instantly as you type. No waiting for calculations to process.
Comprehensive
Covers all procurement stages including customs, inspection, and buffer time.
Save & Compare
Save unlimited scenarios and compare them side by side to find the best option.
Works Everywhere
Fully responsive design works on desktop, tablet, and mobile devices.
Ready to Calculate?
Start planning your procurement lead times with precision. No sign-up required.
Start Calculating →