Free Pregnancy Calculators
& Due Date Tools
Track your pregnancy week by week with precision. From due dates to weight gain, our medically-informed calculators help you stay informed every step of the way.
All Pregnancy Calculators
Choose from our collection of free, accurate pregnancy tools
Due Date
Calculate your baby's due date from last menstrual period, conception date, or IVF transfer date.
Weeks Pregnant
How many weeks pregnant am I? Enter LMP or due date to see exact weeks and days.
Conception Date
Calculate when you likely conceived based on due date or current gestational age.
Weight Gain
Track recommended weight gain by trimester based on pre-pregnancy BMI (using IOM guidelines).
Weeks to Months
Convert pregnancy weeks to months and trimesters with a visual timeline.
Timeline
Full pregnancy timeline showing key milestones, appointments, and baby development week by week.
Gestational Age
Calculate gestational age from LMP, ultrasound measurements, or known conception date.
Ovulation
Calculate your fertile window and ovulation date based on cycle length.
When to Test
When is the earliest you can take a pregnancy test? Based on ovulation/conception date.
Dog Pregnancy
Calculate your dog's due date (63-day gestation). Include breed-specific variations.
LMP
Calculate gestational age and due date from your last menstrual period date.
Pregnancy Wheel
Interactive visual pregnancy wheel (like what doctors use) showing dates, weeks, and milestones.
Why Use BabyDateCalc?
Medically Informed
Our calculators use established medical guidelines including Naegele's rule and IOM weight gain recommendations.
Instant Results
All calculations happen instantly in your browser. No sign-ups, no waiting, no data stored on our servers.
Completely Free
Every calculator is 100% free to use, with no hidden fees, premium tiers, or paywalls. Just helpful tools.
Trusted by Expecting Parents
BabyDateCalc provides accurate, evidence-based pregnancy calculators that expecting parents can rely on. Our tools are based on the same methods used by healthcare professionals to estimate due dates, track gestational age, and monitor pregnancy milestones.
Pregnancy Guides
Expert-written guides to help you through your pregnancy journey
Understanding Your Due Date
Learn how due dates are calculated and what they really mean for your pregnancy.
Week by Week Pregnancy Guide
Follow your baby's development and your body's changes through all 40 weeks.
First Trimester Checklist
Essential tasks, appointments, and milestones for weeks 1-13 of pregnancy.