🤰Pregnancy Due Date Calculator
Estimated due date from your last period.
Disclaimer: These tools are for general information and educational use only and are not medical advice, diagnosis or treatment. Individual health needs vary. Always consult a qualified doctor or healthcare professional before making health decisions.
About the Pregnancy Due Date Calculator
Estimate your pregnancy due date and current week from the first day of your last menstrual period (Naegele's rule, LMP + 280 days). An estimate only — not medical advice.
How to use the Pregnancy Due Date Calculator
- 1Enter your details (such as height, weight or age) into the Pregnancy Due Date Calculator.
- 2Pick your preferred units and any relevant options.
- 3Read your estimated result and the guidance shown below it.
- 4Results are indicative only — always consult a professional for medical decisions.
Why use this tool?
Private by design
The Pregnancy Due Date Calculator runs entirely in your browser — nothing you enter is uploaded to a server.
Free, no signup
Use it as much as you like. There's no account, no paywall and no watermark.
Fast & instant
Results appear the moment you type or click — no waiting, no page reloads.
Works anywhere
Any device or browser, even offline once the page has loaded.
Frequently asked questions
How is the due date calculated?＋
It uses Naegele's rule: 280 days (40 weeks) added to the first day of your last menstrual period. It's an estimate.
Is this a substitute for a doctor?＋
No. This is an estimate for general information only — always confirm with your healthcare provider.