Pregnancy Calendar

Follow estimated pregnancy milestones in MiniWebtool’s Pregnancy Calendar. A week-by-week view combines trimester progress, size comparisons, appointment reminders, and a due-date countdown; developmental timing and care schedules vary between pregnancies.

Need help using this tool? Ask AI

Gemini (copy & open)

For Gemini, paste the copied question into the chat. You can also copy it below.

View the question

Help me understand MiniWebtool's Pregnancy Calendar: https://miniwebtool.com/pregnancy-calendar/. What can I use it for, what inputs or settings do I need, and how do I use it and understand the output? Walk me through one simple example. Use this page as your source and answer in English.

Free to useNo sign-up requiredInstant Results

Pregnancy CalendarTry it now — free ▼

About Pregnancy Calendar

Welcome to the Pregnancy Calendar, a comprehensive free online tool that helps you track your pregnancy journey week by week. Whether you know your due date, last menstrual period (LMP), or conception date, this calculator creates a personalized 40-week pregnancy calendar with development milestones, baby size comparisons, trimester progress tracking, and important appointment reminders.

At a Glance

Pregnancy Calendar builds a 40-week calendar from a due date, last menstrual period (LMP) or conception date. It shows the current week, trimester progress, key dates, a due-date countdown and estimated milestones.

Pregnancy Calendar: features at a glance
Feature	What you get	Good for
Three start dates	Start from a due date, from LMP (the tool adds 280 days) or from a conception date (the tool adds 266 days).	Working from whichever date you know
Week-by-week detail	Click any week for a baby size comparison to a fruit or vegetable, a development milestone and appointments.	Following what is expected in each week
Progress tracker	Shows the current week with days left in it, percent of pregnancy completed, trimester markers and days until the due date.	Checking where you are at a glance
Key dates	A timeline of conception, trimester endings, the viability milestone, full term and the due date.	Seeing the main milestones laid out in order
Appointment reminders	Prenatal tests and visits are listed against the weeks in which they are usually scheduled.	Keeping track of scans and screening tests to ask about
40-week timeline	An interactive calendar of all 40 weeks with dates and development information.	Planning ahead around calendar dates

How is a Pregnancy Due Date Calculated?

A pregnancy due date is typically calculated as 280 days (40 weeks) from the first day of your last menstrual period (LMP). This is based on the assumption of a 28-day menstrual cycle with ovulation occurring around day 14. If you know your conception date, the due date is 266 days (38 weeks) from conception. Your healthcare provider may adjust your due date based on ultrasound measurements, especially if your cycle length differs from 28 days.

Calculation Methods

From Due Date: If your doctor has already provided your estimated due date, enter it directly to generate your complete pregnancy calendar.
From LMP: Enter the first day of your last menstrual period. The calculator adds 280 days to determine your due date.
From Conception Date: If you know when conception occurred (through IVF, ovulation tracking, etc.), enter that date. The calculator adds 266 days for your due date.

What are the Three Trimesters of Pregnancy?

Pregnancy is divided into three trimesters, each with distinct developmental stages and experiences:

First Trimester (Weeks 1-12)

The first trimester is a critical period when all major organs and systems begin forming. During this time, many women experience morning sickness, fatigue, and breast tenderness. Key developments include the formation of the neural tube, heart, and basic organ structures. By week 12, the baby has developed fingerprints and can move, though movements are not yet felt.

Second Trimester (Weeks 13-26)

Often called the "honeymoon phase," the second trimester typically brings increased energy and reduced nausea. You will start showing and may feel the first baby movements (quickening) around weeks 18-20. The anatomy scan at week 18-20 provides a detailed look at your baby's development. By the end of this trimester, your baby can hear sounds and respond to light.

Third Trimester (Weeks 27-40)

The final trimester is marked by rapid baby growth and final organ maturation. You may experience Braxton Hicks contractions, increased fatigue, and more frequent prenatal visits. The baby gains about half a pound per week and moves into position for birth. Full term begins at 37 weeks, when the baby is considered ready for birth.

What is the Viability Milestone in Pregnancy?

The viability milestone is reached around 24 weeks of pregnancy. This is when a baby may survive outside the womb with intensive medical care if born prematurely. However, babies born this early face significant health challenges including respiratory issues, developmental delays, and other complications. The chances of survival and healthy development improve substantially with each additional week in the womb, which is why reaching full term (37+ weeks) is the goal.

When is a Pregnancy Considered Full Term?

Pregnancy term classifications are important for understanding your baby's readiness for birth:

Early Term: 37 weeks 0 days through 38 weeks 6 days
Full Term: 39 weeks 0 days through 40 weeks 6 days
Late Term: 41 weeks 0 days through 41 weeks 6 days
Post-Term: 42 weeks 0 days and beyond

Babies born at full term (39-40 weeks) have the best health outcomes as their lungs, brain, liver, and other organs have had adequate time to fully mature.

What Prenatal Tests are Recommended During Pregnancy?

Various prenatal tests and appointments are scheduled throughout pregnancy to monitor both mother and baby health:

First Trimester Tests

Week 6-8: First prenatal visit with blood work, urine tests, and pregnancy confirmation
Week 8-10: First ultrasound to confirm due date and check heartbeat
Week 10-13: NIPT (Non-Invasive Prenatal Testing) for chromosomal screening
Week 11-13: NT scan (Nuchal Translucency) for chromosomal abnormalities

Second Trimester Tests

Week 15-20: AFP (Alpha-fetoprotein) blood test
Week 18-20: Anatomy scan (detailed ultrasound) to check all organ systems
Week 24-28: Glucose screening test for gestational diabetes

Third Trimester Tests

Week 28: Rhogam shot if Rh negative blood type
Week 35-37: Group B Strep test
Week 36+: Weekly visits to monitor position and check for labor signs

How Can I Track My Baby's Size During Pregnancy?

Baby size is commonly compared to fruits and vegetables to help visualize growth week by week:

Week 4: Poppy seed (1 mm)
Week 8: Kidney bean (1.6 cm)
Week 12: Lime (5.4 cm)
Week 16: Avocado (11.6 cm)
Week 20: Banana (16.4 cm) - Halfway point!
Week 24: Ear of corn (30 cm)
Week 28: Eggplant (37.6 cm)
Week 32: Jicama (42.4 cm)
Week 36: Romaine lettuce (47.4 cm)
Week 40: Small pumpkin (51.2 cm) - Due date!

How to Create Your Pregnancy Calendar

Choose your calculation method: Select how you want to calculate your pregnancy dates - by Due Date if you already know it from your doctor, by Last Menstrual Period (LMP) if you remember when your last period started, or by Conception Date if you know when you conceived.
Enter your date: Input the corresponding date using the date picker. The calculator will automatically compute all other important dates.
Generate your calendar: Click "Create Pregnancy Calendar" to generate your personalized 40-week pregnancy calendar.
Review your pregnancy timeline: View your current week status, progress percentage, days until due date, and important milestone dates.
Explore weekly details: Click on any week to see baby size comparisons, development milestones, and recommended appointments.

Understanding Your Results

Your personalized pregnancy calendar includes:

Current Week Display: Shows which week you are currently in with days remaining in the week
Progress Tracker: Visual progress bar showing percentage of pregnancy completed with trimester indicators
Days Until Due: Countdown to your estimated due date
Baby Size: Current size comparison to a fruit or vegetable
Development Milestone: What is happening with your baby this week
Key Dates Timeline: Important dates including conception, trimester endings, viability, full term, and due date
40-Week Calendar: Complete week-by-week breakdown with dates and development information

Reference this content, page, or tool as:

"Pregnancy Calendar" at https://MiniWebtool.com/pregnancy-calendar/ from MiniWebtool, https://MiniWebtool.com/

by miniwebtool team. Updated: Jan 05, 2026

Chat with your favorite AI