Age Calculator

Calculate exact age or the time between two dates — down to the year, month and day. Enter a date of birth and see age as of today or any other date, plus the total days lived and days until the next birthday. Everything runs locally in your browser.

How to Use Age Calculator

1. Enter the date of birth.
2. Optionally change "Calculate age as of" to a different date.
3. Click Calculate Age to see the result instantly.

Key Features

• Calculates full years, months and days between two dates
• Shows total days lived and days remaining until the next birthday
• Calculate age as of any date, not just today
• Runs entirely in your browser — no data is uploaded or stored

Who It's Useful For

• Anyone who needs an exact age for a form or document
• Parents tracking a child's age in years and months
• HR teams checking eligibility ages
• Event planners calculating ages as of a specific date

Practical Examples

• Find someone's exact age today in years, months and days
• Calculate age as of a specific event date, such as a graduation or exam
• Check how many days until a birthday
• Work out the exact gap between two historical dates

Tips for Better Results

• Leave "Calculate age as of" set to today unless you need age on a different date
• Use this for precise age-based eligibility checks instead of rounding manually
• The days-lived total is useful for milestone tracking (such as a 10,000-day birthday)

FAQ

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