Pregnancy Due Date Calculator

Welcome to DueDateNow — a free pregnancy due date calculator that helps you estimate your baby’s expected arrival based on the first day of your last period. Our tool also tells you how far along you are and which trimester you're in.




Frequently Asked Questions

How accurate is this pregnancy due date calculator?

This calculator provides an estimated due date based on your last menstrual period (LMP). While it's a reliable starting point, your healthcare provider may adjust the date after an ultrasound.

What if I don’t remember the first day of my last period?

Try to make the best estimate based on your memory. If you're unsure, a medical professional can use ultrasound to help determine your pregnancy timeline more accurately.

Does this calculator work if my cycle isn’t 28 days?

This calculator assumes a 28-day cycle. If your cycle is longer or shorter, your actual due date may vary. Adjustments may be needed by your doctor.

How many weeks is a full-term pregnancy?

A full-term pregnancy is typically 40 weeks from the first day of your last period. That’s about 280 days.

When should I schedule my first prenatal visit?

Most healthcare providers recommend scheduling your first prenatal visit around 8 weeks into your pregnancy, or as soon as you suspect you're pregnant.

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