Women Pregnancy Calculator - Due Date & Live Minutes

Doctor's LMP Method (280 Days) - Auto-Saves - USA & Europe Date Supported

First Day of Last Period (LMP)

USA: --

Europe: --

ISO (Google): --

--Weeks

--Days Left

--Trimester

--Days Pregnant

--Total Hours

--Total Minutes Live

LIVE: 0 Minutes | --

LMP: -- |

Medically Reviewed by Dr. Ayesha Khan, MBBSWomen's Health Expert | 8+ Years Experience | Reviewed on May 13, 2026 | Sources: ACOG, WHO, Mayo Clinic

⚠️ Medical Disclaimer: This calculator provides an estimate based on LMP and average 28-day cycle. It is for informational purposes only and is not medical advice. Due date can vary by 7-10 days if your cycle is irregular. Always consult your doctor/gynecologist for accurate dating via ultrasound. If you have irregular periods, IVF, or high-risk pregnancy, seek professional medical advice. We do not store your data on server.

How is Pregnancy Due Date Calculated? 280 Days Rule Explained

Doctors worldwide use Naegele's Rule: Add 280 days (40 weeks) or 9 months + 7 days to the first day of your Last Menstrual Period (LMP). Why 280 days? Because ovulation/conception happens about 14 days after LMP. So gestational age (from LMP) is 2 weeks more than fetal age (from conception). Our calculator uses this exact standard. We also show Live Minutes since LMP - it updates every minute and auto-saves so you can come back and track.

USA vs Europe Date Format - Expert Solution for Pregnancy Tracking

Wrong date can cause missed scan. USA: MM/DD/YYYY (e.g., 05/13/2026). Europe/UK/Pakistan: DD/MM/YYYY (13/05/2026). Our solution: 1) Input type="date" auto-shows local format. 2) Output always shows Month Name: May 13, 2026 - universally clear, Google-recommended. 3) For Google backend we provide ISO 2026-05-13. This is the best international practice.

Trimester Guide & What to Do

Trimester 1 (Week 1-12): Organs form. Take folic acid 400-800mcg daily, first prenatal visit at 8-10 weeks, NT scan at 11-13 weeks.
Trimester 2 (Week 13-27): Golden period. Anomaly scan at 18-20 weeks, feel baby movement at 18-22 weeks, glucose test at 24-28 weeks.
Trimester 3 (Week 28-40): Rapid growth. Baby is early term at 37w, full term at 39-40w. Pack hospital bag by 35w. Kick count daily.

Why Live Minutes Feature?

Unlike static calculators, live minutes keep you connected. It increases time-on-page (good for SEO) and helps you track exact progress. It ticks every 60 seconds and is saved in your browser (localStorage) - 100% private.

FAQ - Expert Answers

Q: How accurate is pregnancy due date from LMP?

If your cycle is regular 28 days, accuracy is 90% within +/- 7 days. If irregular, IVF, or you don't remember LMP, ultrasound dating at 8-10 weeks is more accurate. Always confirm with your doctor.

Q: Which date format should I use for pregnancy?

For USA use MM/DD/YYYY, for Europe/Pakistan use DD/MM/YYYY. But best for international site and to avoid confusion is Month Name format like May 13, 2026 - recommended by Google.

Q: Is my LMP data saved and private?

Yes, we save only in your browser localStorage. It never goes to our server. You can clear anytime with Clear button. 100% private.

Q: Can I use this if I have irregular periods or PCOS?

LMP method may be less accurate if cycles are irregular, PCOS, or after birth control. In that case, use early ultrasound dating and consult your gynecologist. This tool is an estimate only.

Sources:

1. ACOG - Methods for Estimating Due Date, 2. WHO - Pregnancy Care Guidelines, 3. Mayo Clinic - Fetal Development Week by Week