Lead time Calculator
- No holidays added yet.
A lead time calculator helps you figure out exactly when a delivery will arrive, when you need to place an order, or how many days exist between any two dates. Choose a mode, enter your dates or lead time, and the tool gives you an instant answer. No manual counting. No missed deadlines.
People use this tool in many situations. Small business owners use it to plan inventory orders and avoid running out of stock. Ecommerce sellers use it to promise realistic delivery dates to customers. Manufacturers use it to schedule production runs and raw material orders. Freight forwarders use it to estimate transit times between ports. Procurement teams use it to determine the latest date they can place a purchase order and still meet a deadline. Project managers use it to plan multi stage workflows. You can also use it for any situation where you need to add or subtract a lead time from a date.
The tool has three modes. Expected Delivery calculates when goods will arrive based on an order date and lead time. Order By Date works backwards from a deadline to tell you the latest date you can place an order. Duration Between shows the total time between any two dates in calendar days, business days, weeks, and months. You can switch between calendar days and business days, exclude holidays, and break your lead time into multiple phases like procurement, production, and shipping.
Every result comes with a copy button so you can save the answer to your clipboard. The tool runs in your browser, needs no signup, and works on desktop and mobile.
Enter your dates and click calculate to get your lead time answer right away.
Frequently Asked Questions About Lead time Calculator
Is this lead time calculator free to use?
Yes. The tool is completely free with no signup, no limits, and no hidden charges.
What is lead time?
Lead time is the total time from placing an order to receiving the goods. It includes procurement, production, assembly, inspection, and shipping. In supply chain terms, it is the time between an order being placed and the stock being ready to use or sell.
How does the lead time calculator work?
Choose one of three modes. Expected Delivery adds your lead time to an order date. Order By Date subtracts your lead time from a deadline. Duration Between shows the total days between any two dates. All modes support calendar days and business days.
What is the difference between calendar days and business days?
Calendar days count every day including weekends. Business days skip Saturdays and Sundays and any holidays you add. Most supply chain planning uses business days for accurate scheduling.
Can I exclude holidays from the calculation?
Yes. Add specific holidays by name and date, or load a list of common US holidays with one click. Holidays are only skipped when using business days mode.
Can I break lead time into multiple phases?
Yes. Add phases like procurement, production, and shipping. The tool calculates each phase separately and shows you when each one starts and ends.
Does the calculator save my data?
No. Everything runs in your browser. Your dates and settings are never uploaded to any server.
Can I use this tool on mobile?
Yes. The calculator works on all devices including phones, tablets, and desktop computers.