Age Calculator — Instant & Accurate

Quickly calculate your exact age from your date of birth to today (or any date) with our free online Age Calculator. Get an instant breakdown in years, months, days, hours, minutes, and seconds. No downloads, no tracking — calculations happen right in your browser.

How to use the Age Calculator

1. Enter your Date of Birth (DOB).
2. (Optional) Select a comparison date or leave blank for today.
3. Click “Calculate Age.”

Within seconds you’ll see a clear result showing years, months, days and the approximate total hours, minutes, and seconds lived.

Features

• 100% Free & Online — no sign-up, no downloads.
• Instant results — accurate years, months, days, hours, minutes, seconds.
• Date difference mode — compare any two dates (birthdays, anniversaries).
• Mobile-friendly and responsive — works on phones, tablets, and desktops.
• Privacy-first — calculations run locally in your browser; we don’t store personal data.
• Leap-year aware — handles leap years and varying month lengths for precise results.

Why use an online age calculator?

Manually calculating age can be error-prone because months vary in length and leap years add complexity. Our calculator removes the guesswork and provides precise results instantly — handy for official forms, eligibility checks, planning events, or satisfying simple curiosity.

How it works

The calculator subtracts your date of birth from the chosen date using Gregorian calendar rules. It adjusts for leap years and different month lengths to compute full years, remaining months, and remaining days. Totals for hours, minutes, and seconds are derived from the exact millisecond difference between the two dates.

Quick steps

1. Enter DOB.
2. Choose a compare date (optional).
3. Press Calculate. See results instantly.

Use cases

• Filling out official documents and applications.
• Checking eligibility for jobs, exams, or programs.
• Planning birthdays, anniversaries, and milestone celebrations.
• Comparing ages between two people or two events.
• Fun facts: find out exactly how many days or seconds you’ve lived.

FAQ

Is this calculator accurate?
Yes. It uses standard Gregorian calendar logic and accounts for leap years and month-length differences. Results are computed client-side for immediate accuracy.

Do you store my date of birth or results?
No. All calculations are performed locally in your browser — we do not collect or store personal data.

Can I calculate someone else’s age?
Absolutely — simply enter their person’s date of birth and the calculator will show their age.

Can I compare two dates (for example, two birthdays)?
Yes. Use the Date Difference mode to compare any two dates and get the exact difference in years, months, days, and time units.

What calendar does the tool use?
The tool uses the Gregorian calendar.

Fun facts

There are 31,536,000 seconds in a non-leap year.
If you are 25 years old, you have lived more than 9,125 days.
The oldest verified human lived to 122 years and 164 days.

Discover your exact age

Enter your birth date now and click “Calculate Age” to discover your exact age down to the second.