Free pregnancy tools

Enter the first day of the last period and cycle length to see the fertile window, ovulation day, and next period for the coming months.

Work out the likely conception date and window from the last period or the due date — plus the due date that goes with it.

Find your due date from the first day of the last period, or from how many weeks pregnant you are today.

Get the due date from an embryo transfer (day 3, 5 or 6) or egg collection date, plus the current week and when the first scan is due.

Turn the crown-rump length from an early scan into weeks pregnant and a due date — or see the expected CRL for any week.

Enter your due date to instantly see your current week and day, trimester, how far along you are, and what your baby is approximately the size of.

Enter your due date and any date to see what pregnancy week, day, and trimester you'll be at. Perfect for planning travel, appointments, and milestones.

Convert any pregnancy week into months and trimesters. Includes a full weeks-to-months chart for all 40 weeks.

See what the baby is approximately the size of at every week from 4 to 40 — no due date required.

Enter a due date to get dating scan, halfway, early term, and due date on the calendar — with how far away each one is.

Calculate pre-pregnancy BMI from height and weight, see the BMI range it falls in, and the weight gain usually recommended for it.

Compare weight gained so far with the typical range for this week of pregnancy, based on pre-pregnancy BMI. Singles and twins.