How does your family size compare?

Over time, family sizes have decreased and women are having fewer children by the age of 30 compared to previous generations.

The average family size for women born in 1942 – for example – was 2.29 children per mother. In contrast, their daughters’ generation – represented by women born in 1969 – had on average 1.91 children per mother. Meanwhile, women born in 1984 had fewer children on average (1.02) by their 30th birthday than women born in 1969 – who had 1.12 children by the same age.

Use our calculator below to enter both your year of birth and your mother’s year of birth – or any other generation(s) you like. How do the different childbearing patterns compare?

Download the data.