Advanced Pregnancy Due Date Calculator

First Day of Your Last Menstrual Period:

Average Length of Your Cycles (days):

Known Conception Date (optional):

IVF Transfer Date (optional):

Estimated Due Date:

Current Pregnancy Week:

Days Remaining Until Due Date:

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Current baby size: -

Pregnancy Progress

Enter your information to see detailed week-by-week information about your pregnancy journey.

Pregnancy Calculator Features

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Accurate Due Date

Calculate your estimated due date based on multiple methods including LMP, conception date, or IVF transfer date.

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Week-by-Week Progress

Track your pregnancy progress with detailed information about fetal development each week.

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Baby Size Comparison

Visualize your baby's growth with fun size comparisons to fruits and vegetables.

Frequently Asked Questions

How accurate is the pregnancy due date calculator? +

Our calculator uses standard obstetric formulas that are widely accepted by healthcare professionals. However, only about 5% of babies are born on their exact due date. Most births occur within two weeks before or after the estimated date.

What's the difference between gestational age and fetal age? +

Gestational age is measured from the first day of your last menstrual period (LMP) and is typically about two weeks longer than fetal age, which is measured from the actual date of conception.

Can I use this calculator if I have irregular periods? +

Yes, our calculator allows you to input your average cycle length, which helps provide a more accurate estimate for those with irregular periods. If you know your conception date or IVF transfer date, you can use those for even more precision.