Pregnancy Calculator

Calculate your due date and pregnancy progress

About Pregnancy Calculator

Our comprehensive Pregnancy Calculator helps expectant mothers track their pregnancy progress, determine due dates, and monitor important developmental milestones. This essential tool provides accurate pregnancy dating, trimester information, and personalized guidance for optimal prenatal care and pregnancy planning.

What It Calculates

  • Due Date: Estimated delivery date based on last period
  • Current Week: Exact pregnancy week and progress
  • Trimester: Current pregnancy trimester (1st, 2nd, or 3rd)
  • Pregnancy Progress: Visual representation of pregnancy timeline
  • Developmental Milestones: Key fetal development stages
  • Prenatal Care Timeline: Important medical appointment schedule

Understanding Your Results

Current Week

Pregnancy progress

Trimester

Pregnancy stage

Due Date

Expected delivery

Progress

Visual timeline

How to Use

Enter the first day of your last menstrual period and your average cycle length. The calculator will automatically determine your due date, current pregnancy week, trimester, and provide a visual progress bar showing your pregnancy journey.

Pregnancy Dating Methods

Last Menstrual Period (LMP)
  • Most Common Method: Used by healthcare providers
  • Calculation: LMP + 280 days (40 weeks)
  • Accuracy: ±2 weeks for most pregnancies
  • Best For: Regular 28-day cycles
  • Limitations: Less accurate for irregular cycles
  • Medical Standard: Widely accepted in healthcare
Ultrasound Dating
  • Most Accurate: First trimester ultrasound
  • Measurement: Crown-rump length (CRL)
  • Timing: 8-13 weeks gestation
  • Accuracy: ±3-5 days
  • Medical Use: Confirms or adjusts LMP dates
  • Standard Practice: Routine prenatal care

Pregnancy Trimesters

First Trimester

Weeks 1-13

  • Fertilization and implantation
  • Major organ development
  • Morning sickness common
  • Fatigue and mood changes
  • Critical development period
  • Prenatal vitamins essential
Second Trimester

Weeks 14-27

  • Fetal movement begins
  • Gender determination possible
  • Energy levels improve
  • Baby bump becomes visible
  • Most comfortable trimester
  • Anatomy scan scheduled
Third Trimester

Weeks 28-40

  • Rapid fetal growth
  • Braxton Hicks contractions
  • Frequent bathroom visits
  • Difficulty sleeping
  • Preparation for labor
  • Weekly doctor visits

Key Developmental Milestones

First Trimester Milestones:

  • Week 4: Heart begins beating
  • Week 6: Neural tube closes
  • Week 8: All major organs form
  • Week 10: Fetus becomes "baby"
  • Week 12: Risk of miscarriage decreases

Second Trimester Milestones:

  • Week 16: Gender visible on ultrasound
  • Week 20: Anatomy scan
  • Week 24: Viability milestone
  • Week 26: Eyes open
  • Week 27: Brain growth spurt

Prenatal Care Schedule

  • First Trimester: Monthly visits, blood tests, ultrasound
  • Second Trimester: Monthly visits, anatomy scan, glucose test
  • Third Trimester: Bi-weekly then weekly visits, group B strep test
  • Special Tests: Genetic screening, gestational diabetes testing
  • Immunizations: Tdap vaccine, flu shot (if in season)
  • Education: Childbirth classes, breastfeeding preparation

Common Pregnancy Symptoms by Trimester

First Trimester Symptoms
  • Morning Sickness: Nausea and vomiting
  • Fatigue: Extreme tiredness
  • Breast Changes: Tenderness and enlargement
  • Frequent Urination: Increased bathroom visits
  • Food Aversions: Strong dislikes to certain foods
  • Mood Swings: Emotional changes
Second & Third Trimester Symptoms
  • Back Pain: Growing uterus pressure
  • Heartburn: Hormonal changes
  • Swelling: Fluid retention
  • Braxton Hicks: Practice contractions
  • Shortness of Breath: Uterus pushing on diaphragm
  • Sleep Issues: Discomfort and frequent urination

Nutrition During Pregnancy

  • Prenatal Vitamins: Folic acid, iron, calcium, DHA
  • Protein: Essential for fetal growth and development
  • Fruits & Vegetables: Vitamins, minerals, and fiber
  • Whole Grains: Complex carbohydrates and B vitamins
  • Healthy Fats: Omega-3 fatty acids for brain development
  • Hydration: 8-10 glasses of water daily

Exercise and Pregnancy

Safe Exercises
  • Walking: Low-impact cardiovascular exercise
  • Swimming: Full-body workout with support
  • Prenatal Yoga: Flexibility and relaxation
  • Stationary Cycling: Low-impact cardio
  • Light Strength Training: Maintain muscle tone
  • Pelvic Floor Exercises: Prepare for labor
Exercises to Avoid
  • Contact Sports: Risk of abdominal trauma
  • High-Impact Activities: Jumping and bouncing
  • Hot Yoga: Risk of overheating
  • Scuba Diving: Pressure changes
  • Downhill Skiing: Risk of falls
  • Horseback Riding: Risk of falls

When to Call Your Doctor

Emergency Symptoms:
  • Severe Abdominal Pain: Sharp or persistent pain
  • Heavy Vaginal Bleeding: Soaking through pads
  • Severe Headache: Especially with vision changes
  • Decreased Fetal Movement: Less than 10 movements in 2 hours
  • Water Breaking: Fluid leakage before 37 weeks
  • High Fever: 100.4°F or higher

Pregnancy Planning Tips

  • Financial Planning: Budget for medical costs and baby expenses
  • Work Arrangements: Plan maternity leave and work accommodations
  • Support System: Build network of family and friends
  • Childbirth Education: Take classes to prepare for labor
  • Baby Registry: Research and register for essential items
  • Postpartum Planning: Arrange help for after baby arrives

Common Pregnancy Myths

Myths Debunked
  • Heartburn = Hairy Baby: No scientific basis
  • Eating for Two: Only 300 extra calories needed
  • No Exercise: Exercise is beneficial and safe
  • Hair Dye Harmful: Limited absorption, generally safe
  • Sex Causes Labor: No evidence supports this
  • Morning Sickness Only Mornings: Can occur anytime
Evidence-Based Facts
  • Folic Acid: Prevents neural tube defects
  • Exercise: Improves pregnancy outcomes
  • Fish Consumption: Limit high-mercury fish
  • Caffeine: Limit to 200mg daily
  • Alcohol: No safe amount during pregnancy
  • Smoking: Increases pregnancy complications
Pro Tip

Remember that every pregnancy is unique, and your experience may differ from others. Use this calculator as a guide, but always consult with your healthcare provider for personalized medical advice. Track your symptoms, attend all prenatal appointments, and don't hesitate to ask questions. Your healthcare team is there to support you throughout your pregnancy journey and ensure the best possible outcome for both you and your baby.