Due Date Calculator: Your Pregnancy Countdown

When will your new family member arrive?

Knowing your estimated due date (EDD) is the first step in planning for your baby’s arrival. Whether you are curious about your birth stone, your baby’s zodiac sign, or just want to know how many days are left, our calculator provides a detailed timeline based on the latest medical standards.

The Math of Birth: Naegele’s Rule

In the US and UK, the standard way to calculate a due date is Naegele’s Rule. This formula assumes a 28-day menstrual cycle and that conception occurred on day 14.

The Formula:

1. Take the date of your Last Menstrual Period (LMP).
2. Add 7 days.
3. Subtract 3 months.
4. Add 1 year.

What if I had IVF?

For In Vitro Fertilization (IVF), the calculation is even more precise.

• If you had a 3-day embryo transfer, your due date is 263 days from the transfer date.
• If you had a 5-day embryo transfer, your due date is 261 days from the transfer date.

Your Pregnancy Timeline at a Glance

Your due date is just one point on a much larger journey. Here is what to expect based on your results:

• First Trimester (Weeks 1-12): Focus on prenatal vitamins and your first “dating” ultrasound.
• Second Trimester (Weeks 13-26): The “Quickening”—when you first feel those tiny kicks!
• Third Trimester (Weeks 27-40): Final preparations, nursery setup, and the hospital bag.