Built by obstetricians at Vinayaka Hospital, our medically accurate calculator uses Naegele's Rule to estimate your delivery date, current pregnancy week, trimester and weekly baby development — in seconds.
At a glance
In just 30 seconds you'll know
Privacy first.
All calculations happen on your device. We never store your personal health information.
Based on Naegele's Rule used by obstetricians worldwide.
Enter your last menstrual period date and tap Calculate — we'll instantly show your estimated due date, current pregnancy week, trimester and baby development stage.
Pregnancy 101
A typical pregnancy lasts 40 weeks measured from the first day of your last menstrual period. Here's what to expect — and how Vinayaka Hospital supports you at every stage.
Weeks 1–12
Your baby's heart, brain and spinal cord form. Common symptoms include fatigue, nausea and tender breasts. Begin folic acid (400–800 mcg/day) and book your first antenatal visit.
Weeks 13–27
Most morning sickness eases. Your bump shows and you'll start feeling your baby move (16–22 weeks). The anatomy scan around week 18–22 evaluates growth.
Weeks 28–40
Your baby gains weight rapidly and gets into birth position. Watch for Braxton-Hicks contractions and reduced movement. Prepare your hospital bag by week 36.
Care guidance
Small daily practices that meaningfully improve maternal and foetal outcomes — drawn from our maternity protocols.
Stay active, gently
150 minutes a week of moderate movement — walking, swimming or prenatal yoga — improves labour outcomes.
Stay up to date on vaccines
Tdap (27–36 wks) and the seasonal flu shot protect both mother and baby.
Mind your mental health
1 in 7 women experience perinatal anxiety. Our counsellors offer judgement-free support.
Watch the warning signs
Severe headaches, vision changes, reduced foetal movement or bleeding need urgent review.
Only ~5% of babies arrive on their exact due date
A full-term delivery is anywhere between 37 and 42 weeks. Treat your due date as a window, not a deadline. If you experience any unusual symptoms, contact our 24×7 maternity helpline immediately.
Calculators give you an estimate — our doctors give you a plan. Book a one-on-one consultation in under a minute. In-person and video options available.
What you get
Why Vinayaka Hospital
Bangalore's trusted mother and child hospital in BTM 4th Stage — combining modern medicine with the warmth of personalised care.
12,000+
Healthy deliveries
25+ yrs
Of trusted maternity care
40+
Specialist gynaecologists
Level III
NICU & maternity ICU
“From my first scan through delivery, Vinayaka felt like an extended family. The painless delivery suite made all the difference.”
Ananya R.
Mother, Bangalore
“I had a high-risk pregnancy and Dr. Mehta's team handled every appointment with care and clear communication. Our daughter is thriving.”
Priya S.
Mother of twins
“The mobile-friendly tools and WhatsApp updates were genuinely helpful during my third trimester. Modern, warm and professional.”
Kavita N.
First-time mum
Free consultation
Tell us when works for you. Our patient relations team will call within 30 minutes between 9 AM – 9 PM IST to schedule your visit.
FAQ
Written and reviewed by our obstetric team. For personalised guidance, please book an appointment.
This pregnancy due date calculator is provided for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Estimates are based on Naegele's Rule and standard obstetric formulas; they may differ from a clinician's assessment based on early ultrasound, ovulation tracking or your individual medical history.
Always consult a qualified obstetrician or gynaecologist for pregnancy-related questions or symptoms. If you are experiencing an obstetric emergency — severe bleeding, severe abdominal pain, reduced foetal movement, severe headache or visual changes — call our 24×7 helpline or visit the nearest emergency department immediately.
Sources: ACOG Practice Bulletin 700, WHO Antenatal Care Recommendations, FOGSI Guidelines (India).