# https://duedatecalculators.com


## Posts

- [What to Expect in Your Second Trimester (Weeks 13-27): The Honest Guide](https://duedatecalculators.com/what-to-expect-in-your-second-trimester/): You made it to the second trimester and things are about to feel a lot more manageable. Here is the honest guide to weeks 13 through 27, covering symptoms, baby development, the anatomy scan, and everything in between. 
- [What to Expect in Your Third Trimester: A Week by Week Guide](https://duedatecalculators.com/what-to-expect-in-your-third-trimester-a-week-by-week-guide/): The finish line is in sight. Here is your honest week by week guide to the third trimester what is happening with your body, your baby, and how to feel as prepared as possible for delivery.
- [Calculator vs. Ultrasound: Which Is More Accurate?](https://duedatecalculators.com/due-date-calculator-vs-ultrasound/): You got one due date from a calculator and a different one from your ultrasound. Now you are confused and maybe a little anxious. Here is the thing - this happens all the time and it does not mean something is wrong. Here is exactly why the numbers differ, what each method is actually measuring, and which one your doctor will rely on going forward.
- [Your First Prenatal Appointment: What to Expect and What to Ask](https://duedatecalculators.com/your-first-prenatal-appointment-what-to-expect-and-what-to-ask/): Your first prenatal appointment is the longest one you will have, and knowing what to expect makes it a lot less overwhelming. Here is exactly what happens and the questions worth asking.
- [Sleep During Pregnancy: What to Expect Each Trimester](https://duedatecalculators.com/sleep-during-pregnancy-what-to-expect-each-trimester/): Sleep during pregnancy is a whole different experience, and not always a good one. Here is what to expect trimester by trimester and what actually helps you get more rest.
- [Early Signs of Pregnancy: When to Take a Test (And What to Expect)](https://duedatecalculators.com/early-signs-of-pregnancy-when-to-take-a-test-and-what-to-expect-2/): That first feeling of "wait, could I be pregnant?" is unlike anything else. Here is an honest look at the early signs to watch for, when to take a test, and what to expect in those first uncertain days.
- [How to Calculate Your Due Date: Complete Guide for 2026](https://duedatecalculators.com/how-to-calculate-your-due-date-complete-guide-2026/): Your due date is one of the first things you want to know after a positive test. Here is a complete guide to the three main ways to calculate it, what your result actually means, and answers to the questions everyone has.

## Pages

- [Medical Disclaimer](https://duedatecalculators.com/disclaimer/): Medical Disclaimer The information provided on this website is for educational and informational purposes only and should not be considered medical advice. Always consult with a licensed healthcare provider regarding pregnancy or medical concerns. Purpose of This Website The information and tools provided on DueDateCalculators.com are for educational and informational purposes only. This website offers estimated pregnancy due dates based on commonly used medical formulas, such as calculations from the first day of the last menstrual period (Naegele’s Rule), conception date, and ultrasound measurements. These estimates are not a substitute for professional medical advice, diagnosis, or treatment. Accuracy of Calculations […]
- [About DueDateCalculators.com](https://duedatecalculators.com/about/): Our Mission DueDateCalculators.com was created to provide a simple, reliable tool for estimating pregnancy due dates based on standard medical calculation methods. We understand that discovering you’re pregnant brings a mix of excitement and questions — and one of the first questions is always: “When is my baby due?” Our goal is to offer clear, easy-to-understand information that helps individuals better understand how due dates are typically determined. We believe that knowledge empowers expectant parents to have more informed conversations with their healthcare providers. We are committed to presenting accurate, research-based explanations of common pregnancy calculations while keeping the experience […]
- [Pregnancy Blog](https://duedatecalculators.com/blog/)
- [Due Date Calculator](https://duedatecalculators.com/): Last Period Conception Ultrasound Enter the first day of your last period. We add 280 days (40 weeks) using Naegele’s Rule — the standard method used by healthcare providers worldwide. First day of your last menstrual period Calculate Due Date If you know your exact conception date, enter it here. We add 266 days (38 weeks). Ideal for those who tracked ovulation or used fertility treatments. Conception date Calculate Due Date Enter your ultrasound date and the gestational age from your report. First-trimester ultrasounds are accurate to within 3–5 days. Ultrasound date Gestational age at ultrasound Calculate Due Date Your […]

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