Pregnancy & Due Date Calculator

Calculate your estimated due date, current pregnancy week, and key milestones based on your last menstrual period or conception date.

Calculate Your Due Date

Select Calculation Method:

Based on Last Menstrual Period (LMP)

Based on Conception Date

Based on Ultrasound Date

First Day of Last Menstrual Period:

Date of Conception:

Ultrasound Date: Weeks at Ultrasound:

Average Cycle Length (in days):

Pregnancy Results

Estimated Due Date

-- -- ----

Your baby is due around this date

Current Pregnancy Week

Conception Date

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Approximate date of conception

Pregnancy Timeline

First Trimester Weeks 1-13

Second Trimester Weeks 14-27

Third Trimester Weeks 28-40+

Full Term 39-40 weeks

About Pregnancy Calculation

Last Menstrual Period (LMP)

Most due date calculations are based on the first day of your last menstrual period (LMP), assuming a 28-day cycle with ovulation on day 14.

Conception Date

If you know your conception date, the calculator adds 38 weeks (266 days) to estimate your due date.

Ultrasound Dating

Early ultrasound measurements (before 20 weeks) are the most accurate way to date a pregnancy, especially if cycles are irregular.

Cycle Length Adjustments

If your menstrual cycle is longer or shorter than 28 days, the due date may be adjusted accordingly.

FAQs

How do I calculate BMI manually?

BMI is calculated by dividing your weight in kilograms by your height in meters squared.

Formula: BMI = weight (kg) ÷ height² (m²)

What is a healthy BMI range for adults?

For most adults, a healthy BMI falls between 18.5 and 24.9, according to global health standards.

Is BMI different for men and women?

The BMI formula is the same for both men and women. However, men and women store body fat differently, so BMI results may be interpreted differently in some cases.

Can BMI be inaccurate for athletes?

Yes. Athletes and highly muscular individuals may have a higher BMI even though they have low body fat, making BMI less accurate for them.