Due Date Calculator
Select the first day of your last period
May, 2026
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Your Estimated Due Date is:
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Based on a 280-day gestation period

What is a Due Date Calculator?

A due date calculator is a simple tool that helps estimate when your baby is likely to be born. By using the first day of your last menstrual period or your conception date, it provides an expected delivery date and helps you understand how far along your pregnancy is. This gives you a clearer timeline to prepare, plan, and feel more connected to your pregnancy journey.

Pregnancy Timeline and How It Is Calculated

Pregnancy is normally calculated as a 40-week period, starting from the first day of your last menstrual cycle. This timeline is divided into three trimesters, each marking important stages of your baby’s growth and development.

A due date calculator estimates your expected delivery date based on a standard pregnancy duration. It also helps track your current week of pregnancy, giving you a better understanding of milestones and what to expect as your body changes over time.

Why Does Tracking Your Due Date Matter?

Knowing your estimated due date helps you stay informed and prepared throughout your pregnancy. It allows you to plan medical visits, monitor your baby’s development, and make timely lifestyle adjustments to support a healthy pregnancy.

It also helps you recognize how your pregnancy is progressing and what changes to expect at each stage. While the exact delivery date may vary, having a clear timeline provides reassurance and helps you approach each phase with greater confidence and awareness.

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Frequently Asked Questions

Everything you need to know about calculating ovulation

Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period or by estimating 38 weeks from the date of conception.

The due date is an estimate based on average pregnancy length. Actual delivery may occur before or after this date.

Yes, doctors may adjust the due date based on ultrasound measurements, especially in early pregnancy.

An early ultrasound scan is used to estimate gestational age and determine your due date.

A full-term pregnancy ranges from 37 to 40 weeks.

Yes, many pregnancies result in delivery between 37 and 40 weeks.

It provides a consistent starting point for calculation, even though conception occurs about two weeks later.

Yes, longer or shorter menstrual cycles can shift ovulation timing and affect the estimated due date.

Yes, IVF due dates are calculated based on the embryo transfer date and embryo age.

Consult a doctor as soon as pregnancy is confirmed and continue regular check-ups to monitor progress and health.
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