ðĪ° Pregnancy Week Calculator
Track your current pregnancy week and countdown to your due date. Calculate gestational age from your due date or last menstrual period.
ðĪ° Your Pregnancy Progress
ð How the Pregnancy Week Calculator Works
A typical pregnancy lasts about 40 weeks (280 days) from the first day of your last menstrual period (LMP). This calculator uses that standard medical framework to determine your current gestational age, trimester, and progress toward your due date.
ð Due Date Method
Enter your estimated due date, and we calculate backward to find your current gestational age. Current week = 40 weeks - (weeks from today until due date).
ðĐļ LMP Method
Enter the first day of your last menstrual period. Gestational age is calculated as the number of weeks from that date to today. This is the most common method used by healthcare providers.
ð Trimesters Explained
Pregnancy is divided into three trimesters: 1st Trimester (weeks 1-13), 2nd Trimester (weeks 14-27), and 3rd Trimester (weeks 28-40). Each trimester marks important developmental milestones for your baby.
ð Progress Tracking
Our visual progress bar shows your journey from conception to due date. The percentage complete gives you a clear view of how far along you are in your pregnancy journey.
ð Pregnancy Week & Trimester Reference Chart
| Weeks | Trimester | Key Milestones |
|---|---|---|
| Week 1-4 | 1st Trimester | Fertilization & implantation; baby is an embryo |
| Week 5-8 | 1st Trimester | Heart begins to beat; arms & legs form |
| Week 9-13 | 1st Trimester | Baby starts moving; organs begin to function |
| Week 14-18 | 2nd Trimester | Gender becomes visible; baby can hear |
| Week 19-23 | 2nd Trimester | Baby develops sleep patterns; skin covered in vernix |
| Week 24-27 | 2nd Trimester | Baby's lungs begin to develop; viability milestone |
| Week 28-31 | 3rd Trimester | Baby can blink; brain development accelerates |
| Week 32-36 | 3rd Trimester | Baby settles into birth position; bones fully developed |
| Week 37-40 | 3rd Trimester | Full term; baby gains weight & prepares for birth |
ð Swipe to see full table
ð Why Tracking Your Pregnancy Week Matters
Knowing your exact pregnancy week helps you and your healthcare provider monitor fetal development, schedule important prenatal tests, and prepare for each stage of pregnancy.
ðĨ Prenatal Care
Different tests and screenings are recommended at specific weeks of pregnancy. Accurate gestational age ensures you don't miss critical prenatal appointments and screenings.
ðķ Fetal Development
Each week brings new growth and development milestones. Tracking your week helps you understand what's happening with your baby's growth and what to expect next.
ð Birth Planning
Knowing your due date and how far along you are helps with birth planning, maternity leave timing, and preparing for your baby's arrival.
âĪïļ Maternal Health
Tracking pregnancy weeks helps monitor maternal health changes, manage symptoms, and know when to seek medical attention if concerns arise at any stage.