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Pregnancy Due Date

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Formula & Calculation Logic

Due Date = LMP + 7 Days − 3 Months + 1 Year
LMP
LMP: First day of Last Menstrual Period.
Naegele's Rule
Naegele's Rule: Assumes a regular 28-day cycle with ovulation on day 14.

Tracking Your Journey

A typical human pregnancy lasts about 40 weeks (280 days). Our calculator uses Naegele's Rule, which is the clinical standard for estimating an expected delivery date.

The Three Trimesters

  • First Trimester (Weeks 1–12): A time of rapid development where all major organs begin to form.
  • Second Trimester (Weeks 13–26): Known as the "golden period" where morning sickness often fades and fetal movement starts.
  • Third Trimester (Weeks 27–40): The baby focuses on gaining weight and preparing for birth.
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Related Calculators

Understanding Your Results: Pregnancy Due Date Calculator

The Pregnancy Due Date Calculator provides valuable insights into your wellness metrics. Monitoring these numbers is an essential part of maintaining a healthy lifestyle. This tool uses established medical formulas to estimate your results based on the inputs provided.

Health & Wellness

Consistent tracking can help you understand trends in your health journey. While this calculator offers a reliable estimate, individual variations always apply.

Note: This tool is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before making significant changes to your diet or exercise routine.