Wyvek

Age Calculator

Find exact age in years, months, and days.

Enter your date of birth to calculate your exact age.

Free online age calculator

This age calculator tells you exactly how old you are in years, months, and days — the answer to "how old am I?" in a single click. Enter your date of birth and it instantly works out your chronological age at today's date, or any date you choose. Alongside the year-month-day breakdown, it shows your age in total months, total weeks, and total days, plus a countdown to your next birthday. Everything runs in your browser, so your date of birth stays private.

How to calculate your age

  1. Pick your date of birth in the first field.
  2. Leave the Age at date on today, or change it to any past or future date.
  3. Read your exact age in years, months, and days as it updates live.
  4. Check the totals and the days remaining until your next birthday.
  5. Click Copy to grab a tidy summary for forms or messages.

Why exact age matters

Knowing your precise age is useful for eligibility checks, official forms, retirement and pension planning, medical dosages, school cut-off dates, and milestone birthdays. Because the calculator borrows days and months the same way you would by hand, the result matches how age is counted in everyday life. Working with timestamps instead? Convert epoch values with our Unix timestamp converter, or explore health metrics with the BMI calculator.

Private and instant

There is no sign-up and nothing is uploaded — the calculation happens locally on your device. Bookmark this page the next time you need a fast, accurate age from a date of birth.

Frequently asked questions

How does the age calculator work?

Enter your date of birth and the tool works out your exact age at the chosen date. It subtracts the day, month, and year parts and borrows correctly across months, so you get a precise age in years, months, and days — plus totals in months, weeks, and days. Everything is calculated in your browser as you type.

How is age calculated in years, months, and days?

Your age is the completed time between your date of birth and the target date. We subtract the birth day from the target day; if the result is negative we borrow the number of days in the previous month and reduce the month count. If months then go negative, we borrow 12 months and reduce the year count. This mirrors how you would count age by hand.

Can I calculate my age at a future or past date?

Yes. Change the "Age at date" field to any date to see how old you were, or will be, on that day. It defaults to today so you instantly see your current chronological age, but it accepts any date you pick.

When is my next birthday?

The calculator shows how many days remain until your next birthday, counted from the selected target date. If the target date is your birthday, it shows "Today". This is handy for planning parties, countdowns, and reminders.

Is my date of birth kept private?

Yes. This age calculator runs entirely in your browser using JavaScript. Your date of birth is never uploaded, stored, or shared, so it is safe to use for private or sensitive information.

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