How old will someone be on a given date?

Work out how old someone is on a chosen date, in years, months and days.

How we count

We count the whole months from the date of birth to the chosen date, then the remaining days. When the birth day does not exist in the target month (31 January + 1 month), the last day of that month counts. The total number of days is shown too.

Handy for a milestone birthday, an anniversary or plain curiosity: how old will Grandma be in three months?