Pregnancy Due Date Calculator

Estimate your baby’s expected due date using your last menstrual period, conception date, IVF transfer date, or ultrasound date. This calculator also shows your estimated pregnancy week, trimester, and important milestone dates.

Plan with confidence

Get a clear estimated timeline for pregnancy milestones in seconds.

Calculate Your Estimated Due Date

Calculation Method

First Day of Last Period

Cycle Length

Period Length

Your result will appear here

Enter your date and click calculate to estimate your pregnancy due date.

Multiple Date Methods

Use last period, conception, IVF transfer, or ultrasound details for a more flexible estimate.

Pregnancy Timeline

See your estimated pregnancy week, trimester, and key pregnancy milestone dates.

Helpful Guidance

This tool gives an estimate only. Your healthcare provider can confirm dates more accurately.

What Is a Pregnancy Due Date Calculator?

A pregnancy due date calculator helps estimate the date when your baby may arrive. Most pregnancies are calculated as about 40 weeks from the first day of the last menstrual period. Since every pregnancy is different, the result should be treated as an estimated date, not a guaranteed delivery day.

Why the Due Date Matters

Your estimated due date helps you understand pregnancy stages, schedule prenatal checkups, prepare for important scans, and plan for your baby’s arrival. Doctors also use due dates to track fetal growth and pregnancy progress.

How Accurate Is This Calculator?

The calculator uses common medical date formulas, but natural cycle variation, ovulation timing, ultrasound findings, and individual health factors can change the final due date. For the most accurate guidance, always confirm your pregnancy timeline with a qualified healthcare provider.

How This Pregnancy Due Date Calculator Works

Select a calculation method.
Choose whether you want to calculate by last period, conception date, IVF transfer date, or ultrasound date.
Enter the required date.
Add your last period date, conception date, embryo transfer date, or ultrasound date depending on the selected method.
Review your estimated result.
The tool displays your estimated due date, pregnancy week, trimester, and important pregnancy milestone dates.

Pregnancy Due Date FAQs

Is a pregnancy due date calculator exact?

No. A due date calculator gives an estimated date. Your actual delivery date may be earlier or later depending on your pregnancy and medical condition.

Which method is best for calculating due date?

The last menstrual period method is commonly used, but early ultrasound can often provide a more accurate estimate, especially if cycles are irregular.

Can my due date change after ultrasound?

Yes. Your healthcare provider may adjust your due date after an ultrasound if baby measurements suggest a different pregnancy age.

What is the normal pregnancy length?

Pregnancy is usually estimated at around 40 weeks from the first day of the last menstrual period, but healthy babies can arrive before or after this date.

Can I use this calculator for IVF pregnancy?

Yes. This calculator includes IVF options for Day 3 and Day 5 embryo transfer dates to estimate the expected due date.