Due Date Calculator
Estimate from the first day of the last menstrual period
Quick guide
What can Due Date Calculator help you do?
Estimate a pregnancy due date from the first day of the last menstrual period using the conventional 280-day method for a regular 28-day cycle.
Best for
Due Date Calculator is for everyday date, time, health, planning, lookup, and decision tasks that you want to finish quickly on desktop or mobile.
How to use it
For Due Date Calculator, enter the date, number, or search condition shown on the page, then choose the location, unit, or mode if the tool provides one.
How to read the result
After using Due Date Calculator, use the result for planning or a first estimate. If it affects health, money, legal matters, or official data, compare it with an authoritative source.
Privacy and limits
When using Due Date Calculator, most everyday tools run in the browser with no account. If you enter birthdays, addresses, or personal details, provide only what is needed.
For Due Date Calculator: Everyday tools are built for convenience and speed. They do not replace professional advice or the latest official information.
Frequently Asked Questions
Is this tool free?
Yes. It runs in your browser and does not require sign-in.
Is the result exact?
The result is a practical estimate or conversion. For tax, medical, legal, or financial decisions, verify with a qualified source.