Pregnancy Due Date Calculator

Calculate your pregnancy due date, gestational age, and important pregnancy milestones. Free online pregnancy calculator.

Calculator

Pregnancy Due Date Calculator

Calculate your pregnancy due date, gestational age, and important pregnancy milestones with our free online calculator. Track your pregnancy journey week by week.

Pregnancy Due Date Calculator

Calculation Method

Date Information

Additional Information (Optional):

Results

Enter your last menstrual period date above to see your pregnancy timeline.

Pregnancy Timeline

First Trimester (Weeks 1-12)

Early development, morning sickness, fatigue. Baby's major organs begin to form.

Second Trimester (Weeks 13-26)

Often called the "honeymoon phase." Energy returns, baby movements begin.

Third Trimester (Weeks 27-40)

Baby grows rapidly, preparation for birth, nesting instincts.

Full Term

37-42 weeks is considered full term. Most babies arrive between 38-42 weeks.

How to Use

  1. Select your calculation method (LMP is most common)
  2. Enter the first day of your last menstrual period
  3. Optionally adjust cycle length and luteal phase
  4. Click "Calculate Due Date" to see your pregnancy timeline
  5. Review important dates and milestones

Important Pregnancy Dates

Conception Date:

Typically occurs 14 days after the start of your last period (in a 28-day cycle)

First Trimester Screening:

Usually between weeks 11-14

Anatomy Scan:

Typically between weeks 18-22

Gestational Diabetes Test:

Usually between weeks 24-28

Features

  • • Calculate due date
  • • Track gestational age
  • • Important milestone dates
  • • Trimester information
  • • Multiple calculation methods
  • • Free to use

Perfect For

  • • Expecting parents
  • • Pregnancy planning
  • • Healthcare providers
  • • Pregnancy tracking
  • • Birth planning
  • • Prenatal care

Important Disclaimer

This calculator provides estimates only and should not replace professional medical advice. Always consult with your healthcare provider for accurate pregnancy dating and medical guidance. Due dates are estimates, and only about 5% of babies are born on their exact due date.

Frequently Asked Questions

How accurate is the pregnancy due date calculator?

The due date calculator provides an estimate based on the first day of your last menstrual period. Only about 5% of babies are born on their exact due date, with most arriving within 2 weeks before or after.

What is Naegele's rule?

Naegele's rule is the standard method for calculating due dates: add 7 days to the first day of your last menstrual period, then subtract 3 months and add 1 year.

Can I calculate my due date if I know my conception date?

Yes, if you know your conception date, you can add 266 days (38 weeks) to get your estimated due date.