Pregnancy Week-by-Week Calculator

Pregnancy Week-by-Week Calculator

Track your pregnancy progress week by week with detailed baby development milestones, maternal changes, and important appointments.

Please enter valid date
Note: Pregnancy weeks are calculated from the first day of your last menstrual period. Development milestones are general guidelines.

Your Pregnancy Journey

20
Weeks Pregnant
1st Trimester
2nd Trimester
3rd Trimester
0 weeks 20 weeks 40 weeks

Pregnancy Timeline:

Current Gestational Age: 20 weeks, 3 days
Days Pregnant: 143 days
Trimester: Second Trimester
Days Until Due Date: 137 days
Estimated Due Date: January 15, 2025
🍌
Your baby is about the size of a banana
Length: ~10.1 inches | Weight: ~10.6 oz
Brain Development
Neural pathways are forming rapidly, and baby can hear sounds from outside the womb.
Physical Growth
Bones are hardening and baby’s movements are becoming more coordinated.
Sensory Development
Eyes can move and baby can distinguish between light and dark.
Motor Skills
Baby can grasp and may start sucking thumb or fingers.

What You Might Experience This Week:

Important Reminders

Upcoming Milestones:

About

Our Week-by-Week Calculator provides detailed information about your baby’s development and your changing body throughout each week of pregnancy.

Why Choose

Comprehensive weekly tracking with baby development milestones, maternal changes, size comparisons, and important appointment reminders.

Features

Weekly navigation, baby size comparisons, development tracking, symptom monitoring, appointment reminders, and milestone timeline.

Benefits

Stay informed about baby’s growth, understand body changes, prepare for appointments, and track important pregnancy milestones week by week.

1

Enter Your Information

Input your last period date and cycle length to calculate your current pregnancy week and due date.

2

Explore Weekly Details

View your baby’s current development, size comparisons, and what changes you might experience this week.

3

Track Your Journey

Navigate between weeks to see past and future milestones, and prepare for upcoming appointments and changes.

Frequently Asked Questions – Week-by-Week Tracking

How accurate are the weekly development milestones?

Development milestones are based on medical research and represent typical fetal development. However, every baby develops at their own pace, and some variation is completely normal. Always consult your healthcare provider for personalized information.

Why might my symptoms differ from what’s listed?

Every pregnancy is unique. Some women experience all common symptoms, while others may have few or different symptoms. The symptoms listed are common experiences, but your individual pregnancy may vary significantly.

When should I schedule prenatal appointments?

Typically, appointments are monthly until 28 weeks, bi-weekly from 28-36 weeks, then weekly until delivery. Your doctor may recommend a different schedule based on your individual needs and risk factors.

How are pregnancy weeks calculated?

Pregnancy weeks are calculated from the first day of your last menstrual period (LMP), not from conception. This is the standard medical practice, making pregnancy about 40 weeks long, even though conception occurs around week 2.

What if my due date changes after an ultrasound?

Due dates may be adjusted based on early ultrasound measurements, which are more accurate than LMP dating. If your due date changes, update the calculator with your new due date for more accurate weekly information.