Birthday Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds, or find out how many days until your next birthday.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Birthday Calculator
This calculator computes either your exact age or the days until your next birthday. Follow these steps:
- Enter your birth date in the "Your Birth Date" field. This is required.
- Set a target date (optional). Leave blank to use today's date.
- Choose a calculation type:
- Age (Exact) – Shows years, months, days, plus total days/hours/minutes/seconds.
- Days Until Next Birthday – Shows the countdown to your next birthday.
- Click Calculate to see the result.
Note: The target date must be after your birth date. All dates use the format YYYY-MM-DD.
Previous Results
| Result | Inputs | Date |
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Frequently Asked Questions
The calculation is exact based on the birth date and target date you provide, accounting for leap years and varying month lengths.
It defaults to today's date, so you can quickly see your current age.
Yes, simply enter their birth date and optionally a target date.