Pregnancy Due Date & Gestational Age Calculator (Naegele's Rule)
Calculate your Estimated Due Date (EDD), current gestational age in weeks and days, and pregnancy trimesters progression based on the standard 280-day obstetric timeline.
Calculator Inputs
Live Real-TimeDays Remaining Until Estimated Due Date
Weeks Remaining
18 weeks
Pregnancy Completion %
55%
Current Trimester
2 trimester
Elapsed vs Remaining Gestational Days
Detailed Calculation Breakdown
Calculation Methodology
Estimated Due Date = 280 Days (40 Weeks) from LMP. Pregnancy Trimesters: 1st (Weeks 1-13), 2nd (Weeks 14-27), 3rd (Weeks 28-40).
Important Legal & Educational Disclaimer
This tool provides gestational estimates based on obstetric guidelines. Clinical ultrasound dating is the medical gold standard.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
Related Calculators
Recommended tools and calculators tailored to your current calculation
Ovulation & Peak Fertility Window Calculator (Cycle Tracker)
Calculate your estimated ovulation day, 6-day peak fertile window, and next menstrual cycle onset based on your personal cycle length and the 14-day luteal phase.
VO2 Max Cardiovascular Fitness Calculator (Rockport Fitness Walk)
Estimate your maximal oxygen uptake (VO2 Max in ml/kg/min) and cardio fitness percentile using the clinical Rockport 1-Mile Fitness Walking protocol.
BMR & TDEE Daily Caloric Needs Calculator (Mifflin-St Jeor)
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the clinical Mifflin-St Jeor formula with tailored caloric targets for fat loss, maintenance, and lean bulking.
Body Frame Size Calculator (Height to Wrist Circumference Ratio)
Determine your clinical skeletal body frame size (Small, Medium, Large) using height-to-wrist anthropometric ratios to refine ideal weight and muscle growth potential.
Daily Water Intake & Hydration Calculator (Weight & Activity)
Calculate your optimal daily water intake in liters and 250ml cups tailored to your body weight, workout duration, and climatic temperature to maintain peak physiological performance.
BMI & Ideal Body Weight Calculator
Calculate your Body Mass Index (BMI), healthy weight range, and body classification based on WHO standards.
Ideal Body Weight (IBW) Calculator (Devine & Robinson Formulas)
Calculate your ideal body weight (IBW) based on height and biological sex using validated clinical formulas (Devine, Robinson, and Miller) and WHO healthy BMI weight boundaries.
Body Fat Percentage & Lean Body Mass Calculator (Deurenberg)
Calculate body fat percentage, total fat mass, and lean body mass (LBM) using the validated Deurenberg clinical anthropometric formula with fitness category benchmarking.