Lead Time Calculator
Lead time is the wait between placing an order and receiving it. Enter the day the order went in, how many days the maker needs, and how many days shipping takes.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Lead time is the production days added to the shipping days. The expected arrival is the order date plus that total.
This tool adds calendar days, so weekends and holidays are counted. If your supplier works weekdays only, add those extra days to the production count.
Worked example
An order placed on 2026-11-05, with 10 days to make and 5 days to ship, has a lead time of 15 and should arrive around 2026-11-20.
Questions
Why does the arrival date move?
It moves whenever you change one of the three numbers. Try a longer shipping time to see how the date shifts.
Is this a promise from the supplier?
No. It is a planning estimate. Ask your supplier for their own timing and any delays they expect.
Can I use a date from the past?
Yes, to see what a past order's timing would have been. The arrival date simply moves forward by the total days.
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