Pregnancy Calculator to Track Weeks, Trimesters ...
Track your pregnancy week by week. Calculate your current gestational age, trimester, and key milestones like fetal viability, anatomy scan, and full-term date.
How Does a Pregnancy Calculator Work?
A pregnancy calculator tracks gestational age — the number of weeks and days elapsed since the first day of the last menstrual period (LMP). It maps your current stage to developmental milestones, trimester boundaries, and key medical appointments.
🤰 Pregnancy Calculator
Use our free calculator for instant, accurate results.
📐 Formula
Gestational Age = (Today − LMP) in weeks and days
Trimesters: T1 = Weeks 1–12 | T2 = Weeks 13–26 | T3 = Weeks 27–40. Full term = 37–42 weeks.
📝 Worked Example
LMP = January 1, 2026. Today = March 12, 2026:
Elapsed = 10 weeks, 3 days
Currently in First Trimester
Due Date ≈ October 8, 2026
📝 How to Use the Calculator
❓ FAQ
When is the first prenatal visit usually scheduled?
Typically at 8–10 weeks gestation. Some providers see patients earlier for high-risk pregnancies.
What is fetal viability?
Around 24 weeks (with intensive care). Survival rates increase substantially after 28 weeks.
Veer Kumavat
Founder & AuthorVeer is a 14-year-old student from Nashik, Maharashtra, who built SciFi Calculators to help students worldwide master STEM subjects. He is passionate about making complex science and math problems accessible through intuitive digital tools.