Pregnancy Tool

Pregnancy Week Calculator

Enter your LMP date and find out exactly how many weeks and days pregnant you are right now, your trimester, and your due date.

100% Private Instant Results Medically Reviewed
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How Many Weeks Pregnant?

Current Week & Day
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Trimester
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Due Date
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Progress
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Pregnancy is counted from LMP. Confirm with your OB-GYN and ultrasound.

How Pregnancy Weeks Are Counted

Pregnancy is measured from the first day of your last menstrual period (LMP), not from conception. This means during "weeks 1–2" you haven't actually conceived yet — ovulation happens around week 2, and conception occurs shortly after. Full-term pregnancy is 40 weeks from LMP.

What Happens Each Trimester

  • First Trimester (Weeks 1–13): Most critical for organ formation. Morning sickness peaks at 8–10 weeks. Miscarriage risk highest here.
  • Second Trimester (Weeks 14–27): The golden trimester — energy returns, bump shows, first movements (quickening) felt at 18–22 weeks.
  • Third Trimester (Weeks 28–40): Rapid baby weight gain. Braxton Hicks, back pain, heartburn are common. Baby settles into birth position.
What if my ultrasound shows a different week?
Ultrasound dating is more accurate than LMP dating, especially for irregular cycles. If there's a discrepancy of more than 7 days before 14 weeks, your doctor may adjust your due date based on ultrasound measurements.

Medical Disclaimer: This tool is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for personalized guidance.

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