🤰 Due Date by Last Period Calculator
Estimate key pregnancy and cycle dates.
About the Due Date by Last Period Calculator
The Due Date by Last Period Calculator is part of the Pregnancy & Women's Health tools on Medical House. It gives you a quick, reliable estimate using standard formulas. Enter your details above and get an instant result — everything is calculated privately in your browser.
These tools are for general guidance only and are not a substitute for professional medical advice. If you have a health concern, consult a qualified doctor or nutritionist listed on Medical House.
Frequently Asked Questions
Is the Due Date by Last Period Calculator free to use?
Yes, this Due Date by Last Period Calculator is completely free and works right in your browser on mobile and desktop — no sign-up required.
Are the results accurate?
The tool uses standard, widely-accepted formulas to give a reliable estimate. For medical decisions, always confirm with a qualified doctor — you can find verified doctors on Medical House.
Is my data saved?
No. All calculations happen in your browser; nothing you enter is stored or sent to a server.