How to use pregnancy due date calculator
Estimate a due date from the first day of the last period. This browser tool shows the inputs, assumptions and resulting output so you can use it for a specific everyday task.
- Enter your own values or choose a supported file.
- Adjust the options and run the tool.
- Review the result, then copy, export or save it when available.
Try this next
Use the first day of the last period and an assumed regular cycle length to estimate a due date.
This is a date estimate, not confirmation of pregnancy. Clinical assessment and ultrasound may give more accurate dating.
Questions, answered.
Is pregnancy due date calculator free to use?
Yes. This tool is part of Nepocore’s free browser toolkit. There is no paid tier, file-download gate or application account required.
What should I check before using the result?
This is a date estimate, not confirmation of pregnancy. Clinical assessment and ultrasound may give more accurate dating.
Does this tool upload my files or text?
The tool processes its input in your browser. File contents and text are not sent to a processing server. See the privacy page for local storage and hosting details.