Calculate your due date, track each week of development, and access expert-backed guidance โ all in one beautiful, easy-to-use tool.
Expert-designed calculators and trackers to guide you through every milestone of your journey.
Instantly calculate your estimated delivery date based on your last period or conception date.
Track healthy weight gain by trimester based on your pre-pregnancy BMI and guidelines.
Know exactly which vitamins you need, when to take them, and the right dosages.
Track your baby's movements and know when to contact your doctor for peace of mind.
Predict your fertile window and best days to conceive based on your cycle.
Specially designed for IVF and assisted reproduction with Day 3 and Day 5 support.
Chart your hCG levels over time to understand early pregnancy progression.
Discover thousands of beautiful, meaningful names for your little one.
See how your baby grows from a tiny embryo to a full-term newborn, week by beautiful week.
Our calculators use medically validated algorithms based on Naegele's Rule and recommendations from OB-GYN professionals.
Join over 2 million parents who trust GetPregnancyCalculator for their pregnancy journey.
Get answers to the most common questions about pregnancy calculators and your journey.
Online due date calculators based on your last menstrual period (LMP) are quite accurate โ typically within 1-2 weeks. They use Naegele's Rule, the same method used by most OB-GYNs. Your doctor may adjust your due date based on ultrasound measurements at 8-12 weeks.
A first-trimester ultrasound (between 8-14 weeks) is considered the most accurate. Before that, calculations based on the first day of your last menstrual period (LMP) with a regular 28-day cycle are very reliable.
Gestational age is calculated from the first day of your last menstrual period (LMP), not from conception. This means pregnancy is counted as starting about 2 weeks before conception. Full term is 40 weeks from LMP.
Yes! Adjust the cycle length in our calculator to match your average. If your periods are very irregular, an early ultrasound will give a more accurate due date. We also offer a conception-based calculator if you know when you ovulated.
The first trimester runs from weeks 1-13, the second from weeks 14-27, and the third from week 28 to birth. Each trimester brings distinct developmental milestones and changes in how you feel.
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