Pregnancy Wheel Calculator

Calculate your due date, track pregnancy progress week by week, and monitor fetal development. Essential tool for expectant parents.

How it works: The pregnancy wheel calculates your due date based on your last menstrual period (LMP) or conception date. Pregnancy typically lasts 40 weeks (280 days) from the first day of your last period.

Enter the first day of your last period
Average length of your menstrual cycle
Date of your first ultrasound for more accurate dating
weeks days
Gestational age according to ultrasound
Today's date or a date to check progress

Pregnancy Trimesters

First Trimester (Week 1 - Week 12)

The first trimester is a period of rapid development for your baby. Major organs and body systems begin to form.

  • Baby's heart begins to beat (around week 6)
  • Brain, spinal cord, and nervous system develop
  • Arm and leg buds appear
  • Fingers and toes start to form
  • All major organs have begun to form
  • Baby is about 2.5 inches long by week 12
Second Trimester (Week 13 - Week 27)

Often called the "golden period" of pregnancy, many women feel more energy and less nausea during this trimester.

  • You may start to feel baby movements (quickening)
  • Baby's sex can often be determined via ultrasound
  • Baby can hear sounds from outside the womb
  • Fingerprints and footprints form
  • Baby practices breathing movements
  • Baby is about 14 inches long by week 27
Third Trimester (Week 28 - Week 40)

The final stretch of pregnancy, where your baby gains most of their weight and prepares for life outside the womb.

  • Baby's bones are fully formed but still soft
  • Baby opens and closes their eyes
  • Baby turns head-down position for birth
  • Lungs mature and prepare for breathing
  • Baby gains about half a pound per week
  • Average baby weight at birth: 7-8 pounds

Pregnancy Milestones

Week Milestone Baby Size
Week 4 Positive pregnancy test possible Poppy seed
Week 6 Heart begins to beat Lentil
Week 8 All major organs have begun to form Raspberry
Week 12 Risk of miscarriage decreases significantly Lime
Week 16 Can determine baby's sex via ultrasound Avocado
Week 20 You may feel baby movements (quickening) Banana
Week 24 Baby is considered viable outside womb Ear of corn
Week 28 Third trimester begins Eggplant
Week 32 Baby practices breathing movements Squash
Week 36 Baby may move into head-down position Romaine lettuce
Week 40 Due date - Baby is full term Small pumpkin

Pregnancy Health Tips

Nutrition

Eat a balanced diet with plenty of fruits, vegetables, whole grains, and lean protein. Take prenatal vitamins with folic acid.

Exercise

Stay active with pregnancy-safe exercises like walking, swimming, or prenatal yoga. Aim for 30 minutes most days.

Avoid

Avoid alcohol, smoking, recreational drugs, and limit caffeine. Check with your doctor before taking any medications.

Rest

Get plenty of sleep and listen to your body. Rest when you need to, especially during the first and third trimesters.

Important: Always consult with your healthcare provider for personalized medical advice during pregnancy. This information is for educational purposes only.

Frequently Asked Questions

The due date calculated from the first day of your last menstrual period (LMP) is an estimate. Only about 5% of babies are born on their exact due date. Most births occur within two weeks before or after the due date. An ultrasound in the first trimester can provide a more accurate due date.

If your menstrual cycle is longer than 28 days, your due date might be later than calculated. If your cycle is shorter, your due date might be earlier. This calculator allows you to adjust for your specific cycle length for a more accurate due date.

You should schedule your first prenatal appointment as soon as you suspect you're pregnant, typically around 8 weeks of pregnancy. However, if you have any medical conditions or concerns, contact your healthcare provider right away.

Contact your healthcare provider immediately if you experience: severe abdominal pain, vaginal bleeding, sudden swelling, severe headaches, changes in vision, decreased fetal movement after 28 weeks, or if your water breaks.

If you provide ultrasound dating information, the calculator will use the ultrasound gestational age to adjust the due date. Ultrasound dating in the first trimester (up to 13 weeks) is the most accurate method for determining gestational age and due date.