bumpcalc.comPregnancy Due Date Calculator
Calculate your estimated due date from your LMP or conception date, plus week, trimester, and milestones.
Calculate My Due Date11 tools to track due date, labor timing, and baby planning in seconds.
11 free pregnancy calculators based on the same formulas your doctor uses. Check your estimated due date, current week and trimester, conception timing, ovulation and implantation windows, contraction patterns, baby names, baby growth percentiles, and weight gain targets. All tools run directly in your browser — no signup, no data stored.
🏥 Based on standard OB-GYN formulas🔒 Your data stays in your browser✨ 100% free, no signup needed
Pregnancy tools
Pregnancy Week Calculator
Find your exact pregnancy week and day, trimester, and a fruit-size comparison for your baby.
Find My WeekConception Date Calculator
Enter your due date to estimate your likely conception date and conception window.
Estimate Conception DateOvulation Calculator
Estimate ovulation date, fertile window, and next period date from your cycle information.
Find My Fertile WindowImplantation Calculator
Calculate your implantation window from ovulation date or LMP plus cycle length.
Estimate ImplantationContraction Timer
Time contractions in real time, track frequency, and monitor your 5-1-1 labor pattern.
Start Contraction TimerBaby Name Generator
Filter 200+ baby names by gender, letter, origin, and length with meanings and rank.
Generate Name IdeasBaby Growth Percentile Calculator
Estimate simplified WHO-style percentiles for weight, length, and head circumference by age.
Check Baby's GrowthPregnancy Weight Gain Calculator
Get weekly and full-term weight gain targets based on your pre-pregnancy BMI category.
Check My TargetsChinese Gender Predictor
Use the traditional Chinese gender calendar chart for a playful boy or girl prediction reveal.
Get My PredictionPregnancy Week by Week
Follow your baby's development from week 1 to week 42 with size comparisons and growth tracking.
Explore All 42 WeeksHow these calculations work
The due date and week estimates use Naegele's rule, the same formula used by obstetricians worldwide: 280 days from the first day of your last menstrual period, or 266 days from conception. Weight gain targets follow IOM (Institute of Medicine) guidelines, and baby growth percentiles use WHO growth standards.
BumpCalc is for educational planning and tracking. For personalized guidance, confirm dating and milestones with your prenatal care provider.