Pregnancy & Baby Calculators

Free online pregnancy and baby calculators. Track your pregnancy week by week, calculate due dates, fetal weight, and more.

Frequently Asked Questions

How accurate is the due date calculator?

Due dates are estimates. Only about 5% of babies arrive exactly on their due date. Most arrive within 2 weeks before or after.

When is the best time to get pregnant?

The most fertile window is the 6 days ending on ovulation day. Ovulation typically occurs 14 days before your next period.

How much weight should I gain during pregnancy?

It depends on your pre-pregnancy BMI: underweight (28-40 lbs), normal (25-35 lbs), overweight (15-25 lbs), obese (11-20 lbs).