Age calculator
Exact age in years, months and days — plus your age on any other date.
Defaults to today
Born on a Friday
322 days away
Everyone is 1 at birth, +1 each new year
How it works
Age is the calendar difference between two dates, expressed in years, months and days. The only subtlety is what happens when the day of the month does not exist in the target month.
29 February birthdays
In a common year there is no 29 February, so a leapling's birthday falls on 28 February by most conventions — which is what this tool uses for the “next birthday” date. Legally it varies: some jurisdictions specify 28 February, others 1 March.
Korean age
Traditional East Asian age reckoning counted a newborn as one year old and added a year at each lunar new year, making someone born in December two years old within weeks. South Korea formally moved to international age reckoning in June 2023, though the traditional count is still used socially.
Age on a specific date
Setting the second field to a future or past date answers questions like “how old will they be at the wedding” or “was she 18 when the contract was signed” — the second being the reason this is a surprisingly common legal query.