Pregnancy Calculator

Calculate due date, current week, trimester information and important milestones

Last Menstrual Period (LMP) Date

Select the first day of your last menstrual period

Conception Date

Select the estimated conception date (typically around ovulation)

Expected Due Date

Select your expected due date (EDD)

How to Use the Pregnancy Calculator

Our pregnancy calculator provides accurate pregnancy information using three different calculation methods:

🗓️ Calculation Methods

Last Menstrual Period (LMP): Most common method - enter the first day of your last period
Conception Date: If you know when conception occurred (usually around ovulation)
Due Date: If your doctor has given you an expected due date

📊 Results Provided

Due Date: Estimated delivery date (EDD)
Current Week: How many weeks pregnant you are
Days Remaining: Days left until due date
Trimester: Which trimester you're currently in
Conception Date: Estimated conception date

🎯 Important Milestones

View important pregnancy milestones including:
• First heartbeat detection
• First prenatal screening
• Anatomy scan
• Viability milestone
• Third trimester preparation

💡 Tips for Accuracy

• LMP method assumes a 28-day cycle with ovulation on day 14
• Conception date method is more accurate if you know ovulation timing
• Due dates can vary by ±2 weeks naturally
• Always consult your healthcare provider for medical guidance

Frequently Asked Questions

Our calculator uses standard medical formulas and is accurate for estimation purposes. However, only 5% of babies are born exactly on their due date. The actual delivery can occur 2 weeks before or after the calculated date.

The conception date method is most accurate if you know the exact ovulation/conception date. LMP method is most commonly used but assumes a standard 28-day cycle. Ultrasound dating by your doctor is the most accurate.

First trimester: Weeks 1-12, Second trimester: Weeks 13-27, Third trimester: Weeks 28-40. Each trimester brings different developments and milestones for both mother and baby.

If you have irregular periods, the LMP method may be less accurate. Consider using the conception date method if you tracked ovulation, or consult your healthcare provider for an early dating ultrasound.

Yes, your due date may be adjusted based on early ultrasound measurements, especially if there's a significant difference from the LMP calculation. Early ultrasounds (before 20 weeks) are most accurate for dating.