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Curious about which trimester you’re in? Our free Trimester Calculator makes it simple — just enter your due date or the first day of your last period, and it will instantly tell you your current trimester and how far along you are.
Quick, accurate, and private — no accounts, no emails, just helpful pregnancy tracking at your fingertips.
Each trimester comes with its own milestones, symptoms, and care needs. Knowing where you are in your pregnancy can help you:
Our calculator uses standard pregnancy guidelines to make trimester tracking quick and stress-free.
You’ll see:
| Trimester | Weeks | Key Milestones |
|---|---|---|
| First | Weeks 1–12 | Baby’s major organs begin forming, morning sickness common |
| Second | Weeks 13–27 | Bump grows, baby movements felt, anatomy scan |
| Third | Weeks 28–40 | Baby gains weight, final preparations for birth |
📝 Note: Some pregnancies go slightly beyond 40 weeks. Your provider will guide you on next steps if you pass your due date.
Due dates can shift after ultrasounds. Just update the calculator with your latest date for the most accurate trimester info.
Yes! Just enter the first day of your last menstrual period and it will estimate your due date and trimester.
No. All calculations happen on your device. We do not save or share your personal data.
✅ Eat nutrient-rich foods
✅ Stay active with light, safe exercises
✅ Attend all prenatal checkups
✅ Rest and manage stress
Pregnancy is a beautiful journey — knowing your trimester helps you prepare, care for yourself, and embrace every stage with confidence.
