Pregnancy Calculator

Track your pregnancy week by week and get your estimated due date

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How It Works

1
Enter Last Period
Input the first day of your last menstrual period to begin the calculation
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2
Calculate
Our calculator determines your current pregnancy week and estimated due date
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3
View Results
Follow your pregnancy journey with week-by-week development information

Why Use Our Pregnancy Calculator

Accurate Due Date Calculation
Get a precise estimation of your due date based on your last menstrual period, using the same method healthcare providers use.
Week-by-Week Development Tracking
Follow your baby's growth with detailed weekly updates about development milestones, size comparisons, and important medical procedures.
Trimester Breakdown
Understand which trimester you're in and what to expect during each phase of your pregnancy journey.
Medical Timeline
Access a comprehensive timeline of recommended medical check-ups, tests, and screenings throughout your pregnancy.
Size Visualization
Visualize your baby's size with familiar fruit and vegetable comparisons that make it easy to understand their growth.
Pregnancy Planning
Plan ahead with information about important milestones, helping you prepare for each stage of your pregnancy.

Frequently Asked Questions

How is the due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period. This is known as Naegele's rule and is the standard method used by healthcare providers.
What are the three trimesters of pregnancy?
The three trimesters are: First trimester (weeks 1-13), Second trimester (weeks 14-26), and Third trimester (weeks 27-40). Each trimester has different developmental milestones and changes.
How accurate is the pregnancy calculator?
The calculator provides an estimate based on the standard 40-week pregnancy. However, only about 5% of women deliver on their exact due date. Most babies are born within two weeks before or after the due date.