Pregnancy Due Date

Due Date

Calculate estimated due date and pregnancy milestones from last period date

Last Menstrual Period (LMP)

First day of your last period

This calculator uses Naegele's rule (+280 days from LMP) for estimation. Actual due dates may vary. Always consult your OB-GYN or midwife for accurate pregnancy dating and prenatal care.

What is Pregnancy Due Date?

The Pregnancy Due Date Calculator helps expectant mothers estimate their delivery date based on their last menstrual period. It provides a quick, reliable timeline for one of life's most important milestones.

How to Use Pregnancy Due Date

Select calculation method

Choose whether to calculate based on the first day of your last period or conception date.

Enter the date

Input the relevant date into the calendar field.

Adjust cycle length

If your cycle is longer or shorter than the average 28 days, adjust it for better accuracy.

Calculate due date

Click calculate to reveal your Estimated Due Date (EDD).

Key Features

Calculates Estimated Due Date (EDD)

Uses standard medical formulas (Naegele's rule)

Allows adjustments for irregular menstrual cycles

Provides estimated conception dates

Completely private and easy to use

Tips & Best Practices

1
Remember that only about 5% of babies are born exactly on their estimated due date; it is a general guide, not a strict deadline.
2
If you know your exact date of conception (e.g., through IVF), use that method for a more accurate calculation.
3
Use this date to start planning prenatal appointments and researching trimester milestones.
4
Always confirm your due date with an ultrasound and your healthcare provider.

Why Use Our Online Pregnancy Due Date?

Designed for speed, privacy, and precision. All operations occur seamlessly right inside your browser, ensuring your files and private data never touch remote servers. Enjoy lightning-fast processing with zero software installation required.

100% FreeNo subscriptions

Private & SecureLocal client processing

Instant ResultsNo waiting time

Mobile FriendlyWorks on all devices

Frequently Asked Questions

How is the due date calculated?

Most calculators use Naegele's rule: add seven days to the first day of your last menstrual period, then subtract three months.

Is this calculator as accurate as a doctor's?

This tool provides the exact same mathematical estimate a doctor uses initially. However, doctors adjust this date later based on ultrasound measurements.

What if my cycles are irregular?

If your cycle is significantly longer or shorter than 28 days, standard calculations may be off. It is best to consult an OBGYN for an ultrasound dating.

Does the due date change?

Your initial calculated due date rarely changes, but your doctor might adjust the 'clinical' due date if early ultrasounds show the baby measuring differently.

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