Date of Birth and Age Calculator

Calculate your exact age or find your date of birth using our online age calculator. Get precise results down to seconds, weeks, months, and years instantly.

Age & DOB Calculator

Whether you want to know how old you, or someone else, is, or when you were born based on an age, this calculator makes it simple. Choose the calculator type, input the relevant data (including date and time), and see your results in multiple formats instantly.

Calculator Types

Our tool supports two calculation modes:

  1. Calculate Age

    Enter your date and time of birth and the target date/time to calculate your exact age. The result shows:

    • Years, months, days, hours, and minutes
    • Total months and days
    • Total weeks and remaining days
    • Total days, hours, minutes, and seconds
  2. Find Date of Birth (DOB)

    Enter your age in years, months, and days along with a target date/time to find your exact date of birth. Results are shown in the same detailed format as above.

How to Use Age Calculator?

For Finding Age:

  1. Select your birth date and time using the datetime picker.
  2. Choose the date and time you want to calculate your age on (defaults to now).
  3. Click Calculate Age to see the results instantly.

For Finding Date of Birth:

  1. Select the Find DOB mode from the calculator type dropdown.
  2. Enter your age in years, months, and days.
  3. Click Calculate button to find your exact birth date and time.

Why Use This Calculator?

  • Complete Precision: Including time means you get your age down to the second, or determine your birth date/time accurately.
  • Flexible Target Date/Time: Not just “today” — you can pick any date/time in the past or future to see how old (or when born) you would be.
  • Multiple Formats: See age or date-of-birth with breakdowns and totals (e.g., weeks, days, minutes, seconds) for deeper insight.
  • Fast & Free: No signup, no downloads — just fill in and get results instantly.
  • Mobile Friendly: Built with responsive design so it works seamlessly on phones, tablets and desktops.

Example Uses

  • A parent wants to know exactly how many weeks old their baby is on a specific date.
  • Someone wants to know when they were born if they are "30 years, 6 months and 12 days old" on a given date/time.
  • A professional needs a precise age calculation for documentation or scheduling.
  • A fun fact: you can also find out how many seconds you've been alive (or how many minutes until you reach a certain age).

FAQs

Yes, just set your "Calculate Age On" date/time to a future value. The tool will compute as normal.

Including time allows for precise age calculations down to the second, which is useful for exact birth date/time determination.

Yes, by setting the target date to your next birthday date/time, the difference shown will tell how many days/hours/minutes remain.

Yes. You can enter years, months, and days to get the exact date of birth.
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Date of Birth and Age Calculator Online