🤰 Pregnancy & Parenting
Free pregnancy calculators: due date, week-by-week progress, ovulation and fertile windows, baby growth percentiles and weight-gain ranges.
Date math that matters: due dates from last period or conception, trimester boundaries, and how far along you are on any given day — the reference grid for every appointment.
Cycle tools track ovulation and fertile windows for planning, while growth percentiles and weight-gain ranges show how a pregnancy compares with clinical reference curves.
Baby Growth Percentile Calculator
See how your baby measures up on WHO growth charts. Enter age, sex, weight, length and head circumference to instantly view growth percentiles.
Due Date Calculator
Estimate your pregnancy due date based on your last menstrual period.
Ovulation Calculator
Find your ovulation date and most fertile days.
Period Calculator
Predict your next period, ovulation, and fertile window.
Pregnancy Calculator
Estimate your due date, current week, and trimester.
Pregnancy Weight Gain Calculator
Track your recommended pregnancy weight gain based on IOM guidelines.
Frequently asked questions
How accurate is a due date estimate?
Only about 4 percent arrive exactly on cue; most births cluster within two weeks either side — the estimate anchors care, not a deadline.
Which due-date method is used?
Naegele’s rule from the last period by default, with conception and IVF-date inputs where you know them better.
Do percentile results diagnose anything?
No — they compare one child with reference curves; your pediatrician interprets the trend, not a single point.