Pregnancy and Conception Calculator

Pregnancy Due Date & Conception Estimator

Curious about when your baby might arrive? Our pregnancy calculator helps you estimate your due date based on various factors, including the first day of your last menstrual period, conception date, IVF transfer, or your latest ultrasound. Whether you're tracking your cycle, undergoing fertility treatments, or using ultrasound results, our tool provides a tailored estimate of your due date and conception window.

How It Works

Most pregnancies last about 40 weeks from the start of your last period. To estimate your due date, simply count 280 days from this date or choose the "last period" option in our calculator. If you know your conception date, add 266 days to calculate your due date. For IVF, calculate based on the transfer day.

If You’re an IVF Parent

For IVF pregnancies, calculate your due date by counting 263 days from a three-day transfer or 261 days from a five-day transfer. Unfortunately, our tool does not yet accommodate IVF parents, but it’s on the way 😉

Planning Your Due Date

While you can’t control the exact day your baby will be born, understanding your fertile window can help you time conception to align with personal plans.

Can My Due Date Change?

Yes, your estimated due date may shift due to factors like irregular cycles or ultrasound findings.

PS Download our free pregnancy guide: