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Pregnancy due date calculator
Your due date and how far along you are, from your last period, conception or IVF.
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About Pregnancy due date calculator
Estimate your due date from the first day of your last period or the date of conception, and see how many weeks pregnant you are today. A pregnancy lasts about 40 weeks from the last period; only around 5% of babies arrive on the exact due date, so think of it as a window.
How to use Pregnancy due date calculator
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
How is the due date calculated?
By adding 280 days (40 weeks) to the first day of your last menstrual period. If your cycle is not 28 days, the date is adjusted for the cycle length.
Can the due date change?
Yes. Your doctor may adjust it after an early ultrasound, which measures the baby more precisely than the calendar.
Is Pregnancy due date calculator free?
Yes. Pregnancy due date calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.