Pregnancy & Baby
Dates, ranges and week-by-week detail for pregnancy and the first year, sourced from ACOG and NHS patient guidance and linked back to it on every page. Written to be useful to both parents — including the partner who wants to know what to actually do this week.
Everything you type here is computed in your browser. Nothing you enter is stored on a server, sent anywhere, or shared — there is no account and no health data to leak.
Due date calculator
A due date calculator adds 280 days to the first day of your last period, the convention ACOG publishes, and shifts it when your cycle is not 28 days long. It returns the estimated due date, gestational age, trimester dates and the 37 to 42 week window both ACOG and the NHS call term.
Pregnancy weight gain calculator
This applies the 2009 Institute of Medicine ranges: it works out your pre-pregnancy BMI, names the category the IOM puts that in, and shows the total gain range for the whole pregnancy plus the cumulative range by the week you enter. Twin ranges are included, and flagged as provisional by the report itself.
Child height predictor
A child height predictor applies Tanner's mid-parental method: add 13 centimetres to the mother's height for a boy, or subtract it from the father's for a girl, then average the two. The answer comes with Tanner's own band of plus or minus 8.5 centimetres, which spans the 3rd to 97th centile.
Growth percentile calculator
A growth percentile calculator turns a child's height or weight into a centile using the LMS method Cole published in 1990, with the reference tables the WHO and CDC publish by age and sex. Enter an age, a sex and a measurement to see where it falls, and what a centile does not mean.
Baby name generator
This baby name generator filters 4,122 names from the Office for National Statistics record of every name given in England and Wales since 1996. Narrow by first letter, ending, length, popularity band or how a name has moved, match it against a sibling, and share a shortlist. No meanings are invented.
Baby cost calculator
This first-year baby cost calculator adds up published figures rather than estimates: Child Care Aware of America 2025 child care prices, the National Diaper Bank Network nappy range, and the USDA 2015 age nought to two total. Each line shows its source and the year its money is expressed in.
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