👶 Pregnancy Due Date Calculator

Estimated Due Date (EDD) is the expected delivery date. This calculator estimates your due date and current gestational age using Naegele's Rule based on LMP or conception date.

Calculation Method

First day of LMP

Menstrual Cycle

Babies

Results

Due Date

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Current Week

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Trimester

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Days Until Due

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Pregnancy Progress

How to Use the Pregnancy Due Date Calculator

Using the Pregnancy Due Date Calculator is straightforward:

Enter Your Values
Input the required numbers and parameters into the calculator fields. Each field is clearly labeled — simply type your values or use the spinner controls to adjust them.
Configure Options
Select any additional options such as computation mode, currency, time period, or precision level. The calculator updates automatically as you change values.
View the Results
The calculated result is displayed instantly with clear formatting. You can Copy the result to your clipboard or adjust input values to see how different scenarios affect the outcome.

FAQ

Is the due date accurate?

Only 5-10% of babies are born on their exact due date. Normal delivery can occur anytime within 2 weeks before or after. Naegele's Rule is accurate to about +/-7 days.

What is Naegele's Rule?

Naegele's Rule: Add 280 days (40 weeks) from the first day of LMP. Specifically: add 7 days to LMP date, subtract 3 months. This assumes a standard 28-day cycle.

How to adjust for different cycles?

For cycles shorter than 28 days, subtract days; for longer cycles, add days. Multiple births typically arrive earlier - the calculator adjusts accordingly.

How is gestational age calculated?

Gestational age is counted from the first day of LMP (40 weeks total). Conception occurs around week 2. Current week shows how many weeks + days pregnant.

What are key prenatal checkup milestones?

Key milestones: 6-8w (confirmation/ultrasound), 11-13w (NT scan), 16-20w (amniocentesis/quad screen), 20-24w (anatomy scan), 24-28w (glucose test), 36-40w (weekly visits).