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Baby Due Date and Gender Calculator

Reviewed by Calculator Editorial Team

Pregnancy planning often involves estimating the due date and sometimes even guessing the baby's gender. This calculator helps you determine both based on your last menstrual period (LMP) and provides insights into gender prediction methods.

How to Use This Calculator

To calculate your baby's due date and estimated gender:

  1. Enter your last menstrual period (LMP) date in the calculator.
  2. Select your estimated due date calculation method (standard or early/late).
  3. Click "Calculate" to see your results.
  4. Review the estimated due date and gender prediction information.

Note: Gender prediction is based on statistical probabilities and should not be considered definitive. The actual gender will be revealed at birth.

How the Calculator Works

The calculator uses your last menstrual period (LMP) to estimate the due date. The standard calculation adds 280 days to the LMP date, while early/late methods adjust this by ±7 days.

For gender prediction, the calculator uses statistical probabilities based on historical data. These probabilities are not guarantees and should be taken with caution.

Due Date = LMP Date + 280 days (standard) Early Due Date = LMP Date + 273 days Late Due Date = LMP Date + 287 days

Gender Prediction Methods

Several methods claim to predict baby's gender, but none are scientifically proven to be accurate. Common methods include:

  • Nipple flow direction (left or right)
  • Urine test strips
  • Blood tests
  • Ultrasound

These methods have varying degrees of accuracy, typically around 50-60%. The calculator provides estimated probabilities based on historical data.

Example

If the calculator shows a 52% probability for a boy, this means that historically, 52 out of 100 babies born to mothers with similar characteristics were boys.

Due Date Calculation

The due date is calculated based on the last menstrual period (LMP). The standard calculation adds 280 days to the LMP date, resulting in an estimated due date.

Early and late due dates are calculated by adjusting the standard calculation by ±7 days.

Calculation Method Days Added to LMP
Standard 280 days
Early 273 days
Late 287 days

Common Questions

Is gender prediction accurate?

No, gender prediction methods are not scientifically proven to be accurate. They provide estimated probabilities based on historical data.

How is the due date calculated?

The due date is calculated by adding 280 days to the last menstrual period (LMP) date. Early and late methods adjust this by ±7 days.

Can I change the due date calculation method?

Yes, the calculator allows you to select between standard, early, and late due date calculation methods.