Age Calculator

Find your exact age — not just the year, but the precise years, months and days — from your date of birth to today (or any date you choose).

What it shows

• Years, months and days — your calendar age, calculated by borrowing the correct number of days from each month (so it's accurate around month ends and leap years).
• Total months / weeks / days — the same span expressed in a single unit, useful for milestones ("10,000 days old").
• Next birthday — the number of days until your next birthday.

Age at any date

The reference date defaults to today, but you can change it — handy to find your age on a future event, or how old someone will be on a specific day.

Notes

• Calculations use UTC dates, so the day count isn't affected by time zones or daylight saving.
• Everything runs in your browser; your birth date is never uploaded.
• Looking for Korean age (만 나이)? Use the dedicated Korean-age tool.