When to use Age Calculator
Your passport renewal form asks for your exact age in years and months and you're not sure whether to round. Your niece insists she's 'almost seven and a half.' The insurance application wants a specific date difference. Enter a birth date and a target date — the default is today — and the calculator returns the exact difference in years, months, and days, plus a countdown to the next birthday. Change the target date to find out how old you'll be on a future milestone, or how old a historical figure was at a specific moment in history. The date arithmetic handles leap years and varying month lengths correctly using the browser's built-in Date API. Your birth date stays on this page and is never transmitted anywhere.
- Find exact years and months for a passport renewal form
- Check how old a historical figure was at a famous moment
- Count down days to a child's next birthday