𤰠Pregnancy Due Date
Estimate a pregnancy due date from the first day of the last period.
Results are estimates for information only and are not medical advice. See our disclaimer.
How to use the Pregnancy Due Date
- Enter Last period date.
- The result updates instantly as you type.
- Copy or note down your result.
How it works
Due date = first day of last period + 280 days (Naegele rule).
Example
Using the default values (Last period date: 2026-08-01):
Due dateSat May 08 2027
FAQ
Is the Pregnancy Due Date free to use?
Yes. It is free, needs no signup and has no usage limits.
Is my data safe?
Yes. Everything is calculated in your browser, so what you type or upload is never sent to a server.
Can I use it on my phone?
Yes. KsWebProduction is built mobile-first and works in any modern browser.