Changing Dads
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Pregnancy week calculator

Fill in just one field: the first day of the last period, or the due date your midwife gave you.

How weeks are counted

Pregnancy weeks are counted from the first day of the last period, about two weeks before conception. A full-term pregnancy is around 40 weeks.

Estimate based on a 40-week pregnancy. The dating scan may adjust it: your medical team's date is the one that counts. This doesn't replace pregnancy care.

20 wk · Bell pepper

The whole scale, week by week

The fruit scale is just for fun: it illustrates baby's volume, it isn't a medical growth chart.