Pregnancy Due Date Calculator
Last updated: June 1, 2026Estimate your baby's due date from your last period.
Pregnancy Due Date Calculator is a free online calculator to estimate your baby's due date from your last period. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Pregnancy Due Date Calculator
Estimate your pregnancy due date from the first day of your last period using Naegele's rule. See your due date, conception date, current trimester and how many weeks pregnant you are. Free. It runs entirely in your browser, so it's fast, private and free — no software to install.
- 1Enter your numbers.
- 2See the result update instantly.
- 3Adjust the inputs to compare scenarios.
Free to use
No watermarks and no forced sign-up. Free credits to get started.
Private by design
Runs in your browser — your files never leave your device.
Fast & simple
A clean interface, instant results, and it works on any device.
Pregnancy Due Date Calculator — frequently asked questions
Is Pregnancy Due Date Calculator free?
Yes. Pregnancy Due Date Calculator is free to use — no watermarks and no forced sign-up. New visitors get free credits to start, and you can upgrade any time for more.
Is Pregnancy Due Date Calculator safe and private?
Pregnancy Due Date Calculator runs entirely in your browser. Your files never leave your device and nothing is uploaded to a server.
Do I need to create an account to use Pregnancy Due Date Calculator?
No account is required. Open the tool and start right away.
Does Pregnancy Due Date Calculator work on mobile?
Yes — it works in any modern browser on phones, tablets and desktops.
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