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This is typically the first day of your last period
Our pregnancy calculator is a comprehensive tool that helps expectant mothers track their pregnancy progress, calculate due dates, and understand important milestones. Whether you know your last menstrual period, due date, or conception date, this calculator provides accurate pregnancy timeline information.
Select your known date (LMP, due date, or conception date) and enter the information. The calculator uses standard medical calculations (40 weeks from LMP) to provide your due date, current pregnancy week, trimester, and upcoming milestones.
Pregnancy is divided into three trimesters: First (weeks 1-12), Second (weeks 13-26), and Third (weeks 27-40). Each trimester brings different developmental milestones and requires specific prenatal care. Our calculator helps you track which trimester you're in and what's coming next.
For most accurate results, use your LMP date. Due dates from ultrasounds may be more precise. Remember that only about 5% of babies are born on their exact due date. Always consult healthcare providers for personalized pregnancy care and monitoring.
The calculator uses the standard 40-week calculation from LMP, which is accurate for about 80% of pregnancies. Ultrasound dating is more precise.
You can use your estimated due date from an ultrasound or approximate conception date. However, LMP provides the most accurate calculation.
Schedule your first prenatal visit as soon as you know you're pregnant. Regular check-ups are important throughout all trimesters.