Pregnancy Trimester Calculator
Track your pregnancy trimester dates, milestones, and progress. Simply enter your due date or the first day of your last period to calculate your trimester timeline.
Calculate Your Trimesters
Understanding Your Pregnancy Trimesters
First Trimester: Weeks 1-13
The first trimester lays the foundation for your baby’s development. All major organs begin to form, and your baby’s heart starts to beat. You may experience morning sickness, fatigue, and breast tenderness as your hormones change dramatically.
Second Trimester: Weeks 14-27
Often called the “golden period” of pregnancy, most women experience less nausea and more energy during the second trimester. Your baby grows significantly, develops facial features, and begins to move noticeably. You’ll likely have an anatomy scan ultrasound around 20 weeks.
Third Trimester: Weeks 28-40
During the final stretch, your baby gains significant weight and prepares for life outside the womb. Lungs fully mature, and your baby gets into position for birth. You may experience increased discomfort, Braxton Hicks contractions, and difficulty sleeping as your body prepares for labor.
This calculator provides estimates based on standard pregnancy timelines. The actual length of your pregnancy may vary. Always consult with your healthcare provider for personalized medical advice and care.