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Due Date Calculator

Calculate your estimated due date, conception date, and track your pregnancy journey week by week with our comprehensive calculator.

Pregnancy Information

Last Period
Conception Date
Ultrasound
Based on Naegele's Rule: Due Date = LMP + 280 days (40 weeks). Most pregnancies last about 40 weeks from the first day of your last period.
weeks + days
Ultrasound measurements in early pregnancy (especially first trimester) are the most accurate for dating a pregnancy.
Leave blank to use today's date:
Advanced Options

Due Date Results

Oct 08, 2024
Estimated Due Date (EDD)
Week 40 of Pregnancy
12
Current Week
2
Trimester
88
Days Pregnant
192
Days to Go
Conception & Fertile Window
Jan 15, 2024
Most Likely Conception
Jan 8-20
Fertile Window
Pregnancy Progress
30% Complete
Week 12 of 40 30% Complete 28 Weeks Remaining
Baby Development
Size of a lime, about 2.1 inches (5.4 cm)

Important Pregnancy Dates

Mar 25, 2024
End of First Trimester
Week 13 • Risk of miscarriage decreases
Jun 17, 2024
Viability Milestone
Week 24 • Baby can survive with medical care
Jul 2, 2024
Third Trimester Begins
Week 28 • Start kick counting
Sep 17, 2024
Full Term Date
Week 37 • Baby is considered full term

Pregnancy Trimesters Overview

1
First Trimester
Weeks 1-13
  • Baby's major organs form
  • Heartbeat begins (week 6)
  • Morning sickness common
  • Risk of miscarriage highest
  • First ultrasound (week 8-12)
2
Second Trimester
Weeks 14-27
  • Baby's movements felt (quickening)
  • Gender reveal possible (week 16-20)
  • Anatomy scan (week 20)
  • Energy levels improve
  • Baby bump becomes visible
3
Third Trimester
Weeks 28-40
  • Baby gains weight rapidly
  • Lungs mature for breathing
  • Braxton Hicks contractions
  • Baby drops into position
  • Preparation for labor begins

Pregnancy Milestones Timeline

Week 4-5
Positive Pregnancy Test
Most pregnancy tests show positive around this time. Baby's neural tube (brain and spinal cord) begins to form.
Week 8
First Ultrasound
Heartbeat can usually be detected. All major organs have begun to form. Baby is about the size of a raspberry.
Week 12
End of First Trimester
Risk of miscarriage decreases significantly. Nausea often subsides. First trimester screening may be done.
Week 20
Anatomy Scan
Detailed ultrasound to check baby's development. Often reveals gender. Baby is about the size of a banana.
Week 28
Third Trimester Begins
Baby's survival rate if born prematurely increases significantly. Regular kick counts recommended.
Week 40
Due Date Arrives
Only 5% of babies are born on their exact due date. Most babies arrive between 38-42 weeks.

Important Medical Disclaimer

This due date calculator provides estimates based on standard medical calculations. Only about 5% of babies are born on their exact due date. Most births occur within two weeks before or after the estimated due date. Always consult with your healthcare provider for accurate pregnancy dating and prenatal care.

Pregnancy Planning Tips

Schedule Prenatal Appointments

Book your first prenatal appointment around 8 weeks. Regular check-ups are crucial for monitoring your health and baby's development.

Start Prenatal Vitamins

Begin taking prenatal vitamins with folic acid even before conception. Folic acid helps prevent neural tube defects.

Understand Your Due Date

Your due date is an estimate, not an expiration date. Only 5% of babies arrive on their exact due date.

Plan Financially

Review your health insurance, budget for baby expenses, and understand maternity/paternity leave policies at work.

Prepare Your Home

Start planning the nursery, research baby gear, and consider any home safety modifications needed.

Build Your Support System

Consider childbirth classes, find a healthcare provider you trust, and discuss birth preferences with your partner.

Features of Our Due Date Calculator

Multiple Calculation Methods

Calculate your due date using last menstrual period, conception date, or ultrasound data for the most accurate results.

Comprehensive Date Tracking

Get important pregnancy dates including trimester boundaries, viability milestone, and full-term date.

Progress Visualization

See your pregnancy progress with visual indicators, percentage complete, and weeks remaining.

Conception & Fertile Window

Calculate your most likely conception date and fertile window based on your cycle information.

Advanced Customization

Adjust cycle length, luteal phase, and other parameters for personalized calculations.

Privacy Protected

All calculations are done locally in your browser. Your pregnancy information never leaves your computer.