Free Pregnancy Week by Week Calculator
Calculate your due date and track your baby's growth with our free pregnancy week by week calculator. See trimester milestones and development updates.
Your Details
Ready to see your timeline?
Enter your dates to reveal your estimated due date and a personalized pregnancy timeline.
How to Use This Pregnancy Calculator
This tool helps you estimate your due date and track your baby's development.
- Choose Method: Select "Last Period" (most common) or "Conception Date" if you know exactly when you conceived.
- Enter Date: Input the first day of your last period or your conception date.
- Explore: View your estimated due date, current progress, and a week-by-week guide to your baby's growth.
Frequently Asked Questions
How accurate is this due date?▼
This calculator uses Naegele's Rule, the standard method used by doctors. However, only about 5% of babies are born on their exact due date. Most are born within two weeks before or after.
What if my cycle isn't 28 days?▼
This calculator assumes a standard 28-day cycle. If your cycle is significantly longer or shorter, your actual due date might differ slightly. An early ultrasound is the most accurate way to date a pregnancy.
Disclaimer: This calculator provides an estimate based on standard assumptions. Fetal measurements are averages and can vary. Please consult with a healthcare provider for accurate medical advice.