Age Calculator
Calculate your exact age in years, months, and days. Find out your age in different units and when your next birthday is.
Enter your birth date above to calculate your age
Table of Contents
What is an Age Calculator?
An age calculator is a tool that determines your exact age based on your date of birth. It calculates how much time has passed between your birth date and today (or another specified date), providing precise measurements in years, months, days, and other time units.
Age calculators are useful for quickly finding out your exact age, determining eligibility for certain activities or benefits, calculating age differences between people, and tracking milestones. They provide a convenient way to avoid manual date calculations.
Our age calculator shows your age in multiple formats and also tells you when your next birthday is and how many days remain until then.
How it Works
Our age calculator uses precise date arithmetic to calculate the exact difference between your birth date and today's date (or a specified date). Here's how it works:
- Enter Birth Date: Input your date of birth using the date picker
- Optional: Calculate As Of Date: Optionally specify a different date to calculate your age as of that date
- Automatic Calculation: The calculator automatically computes your age in years, months, and days
- Multiple Formats: View your age in total days, weeks, hours, minutes, and seconds
- Next Birthday: Automatically calculates when your next birthday is and how many days remain
The calculation handles leap years, varying month lengths, and all calendar complexities automatically, giving you accurate results every time.
Age Formats
Years, Months, Days
This is the most common format, showing your age in years, months, and days. For example: "25 years, 3 months, 15 days". This format accounts for the actual calendar and handles months with different numbers of days correctly.
Total Days
The total number of days between your birth date and today. This includes all days including leap years and provides a precise count of how many days you've been alive.
Total Weeks
Your age expressed as the total number of weeks. Useful for understanding age in a weekly format or for weekly milestone tracking.
Total Hours, Minutes, Seconds
For a more granular view, you can see your age in hours, minutes, and even seconds. These numbers can be quite large but provide an interesting perspective on how much time has passed.
Common Use Cases
- Personal Use: Quickly find out your exact age or age of family members
- Eligibility Verification: Check if you meet age requirements for voting, driving, legal consent, or age-restricted services
- Age Differences: Calculate the age difference between two people by comparing their ages
- Birthday Planning: Find out when your next birthday is and how many days until then
- Historical Calculations: Calculate someone's age as of a specific date in the past or future
- Milestone Tracking: Track milestones like "10,000 days old" or "1 million hours old"
- Legal Documentation: Determine exact age for legal purposes, contracts, or official documents
- Education: Help children understand time and age concepts through practical examples
Examples
Example 1: Current Age
Birth Date: January 15, 1995
Result: The calculator will show your exact age as of today, such as "29 years, 10 months, 9 days" along with total days, weeks, and other units.
Example 2: Age As Of Specific Date
Birth Date: June 1, 2000
Calculate As Of: December 31, 2024
Result: Shows age as "24 years, 6 months, 30 days" as of that specific date.
Example 3: Next Birthday
If your birthday is March 20 and today is January 5, the calculator will show that your next birthday is March 20 and there are 74 days remaining.
Frequently Asked Questions
The age calculation is highly accurate and accounts for leap years, varying month lengths (28, 29, 30, or 31 days), and all calendar complexities. The calculator uses precise date arithmetic to ensure accurate results.
Yes! Check the "Calculate age as of a specific date" option and enter the date you want to calculate the age for. This is useful for historical calculations or finding out someone's age on a particular date in the past or future.
The calculator uses your browser's local timezone for the current date. When you enter dates, they are interpreted in your local timezone. For maximum accuracy, ensure your device's date and time settings are correct.
The "years, months, days" format accounts for actual calendar months, which have different lengths (28-31 days). For example, if you were born on January 31, your age in months will correctly handle months with fewer days. The calculator always shows the most accurate representation.
While this calculator shows individual ages, you can calculate the age difference between two people by calculating each person's age and subtracting them. Or use the "calculate as of" feature to find each person's age on the same date for comparison.
You cannot enter a birth date in the future. However, you can use the "calculate as of" feature to calculate what someone's age will be on a future date by entering a future date as the "calculate as of" date.
If you were born on February 29, the calculator correctly handles leap years. In non-leap years, your birthday is typically considered to be February 28 or March 1, depending on local conventions. The calculator will show accurate age calculations for leap day birthdays.
No. All calculations are performed locally in your browser. We don't store, save, or transmit any personal information or dates. Your privacy is protected.