Age Calculator
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Leave the second date on today to get the current age. If your browser shows a plain text box instead of a date picker, type dates as YYYY-MM-DD, for example 1990-03-15.
Choose a date of birth to see the age.
Introduction
Use this free age calculator to find your exact age in years, months and days. Choose your date of birth and, if you like, a different “age at” date to see how old someone was or will be on a particular day. You also get total months, weeks, days and hours, plus the date and weekday of your next birthday. Everything runs in your browser and nothing you enter is stored or uploaded.
How to use
- Choose the date of birth.
- Leave “Age at the date of” on today, or pick another date.
- Read your age, the totals and your next birthday.
- Click Copy result to copy a summary.
FAQs
- How is age calculated in years, months and days? Whole years are counted first, then whole months, and the remaining days are what is left over.
- How are leap-day birthdays (29 February) handled? In years without a 29 February, this calculator counts the birthday on 28 February.
- Can I calculate age on a future or past date? Yes, set the “Age at the date of” field to any date after the date of birth.
- Why do other calculators sometimes show a different number of days? Different tools handle month-end dates differently.
- Is my date of birth stored? No, it stays in your browser.
Why Use an Online Age Calculator?
An online age calculator makes it easy to find someone’s age without manually counting years, months, and days. Whether you need to calculate your own age, check a family member’s age, or find the age of someone on a particular date, this free tool provides a quick and convenient solution.
Instead of calculating the difference between two calendar dates yourself, you can enter the required information and view the result in seconds. The calculator is useful for everyday tasks, personal records, school forms, birthday planning, and other situations where an accurate age estimate is needed.
What Can You Calculate with This Age Calculator?
Our free Age Calculator provides more than just your age in years. Depending on the dates you enter, you can use it to explore several different age measurements.
Age in years, months, and days: See your age in a familiar format that is easy to understand.
Total months: Find approximately how many complete months have passed since your birth.
Total weeks and days: Understand your age as a larger number of weeks or days.
Total hours: View an approximate total number of hours based on the date range.
Next birthday: Find the date and weekday of your upcoming birthday.
These results can help you understand the time between two dates in different ways. Remember that totals such as hours may depend on how the calculator handles time zones and the time of day.
How Does an Age Calculator Work?
An age calculator compares your date of birth with a selected calculation date. It first determines the number of complete years between the two dates. It then calculates the remaining complete months and days.
For example, if someone was born on 15 March 2000 and the calculation date is 20 October 2026, their age is 26 years, 7 months, and 5 days.
The calculator also uses the calendar to account for months with different lengths and leap years. This is important because every month does not contain the same number of days. A simple subtraction of the birth year from the current year may give an incorrect result if the birthday has not yet occurred in that year.
When Can You Use an Age Calculator?
An age calculator can be useful in many everyday situations.
Birthday planning: Check someone’s age and find the date of their next birthday.
School and education: Estimate a child’s age when preparing forms or checking general age requirements.
Personal records: Calculate your age on a past date for personal documentation.
Family occasions: Find the age of relatives and friends for birthdays or anniversaries.
Date comparisons: Calculate the age difference between a birth date and another selected date.
For official applications, school admissions, employment, or legal requirements, always follow the rules of the relevant organization. The way an official authority calculates age may differ from the conventions used by an online tool.
Understanding Leap Years and Birthdays
A leap year usually occurs every four years and includes 29 February. People born on this date may encounter different birthday conventions in years when 29 February does not occur.
Our calculator treats 28 February as the birthday for leap-day births in non-leap years. Other calculators or organizations may use a different convention, depending on their purpose and local rules.
If you need an age calculation for a legal, administrative, or official purpose, confirm which convention the relevant authority follows.
Is This Age Calculator Free and Private?
Yes, this tool is designed to be free to use without requiring registration. According to its current design, calculations run directly in your browser, and the dates you enter are not uploaded to or stored by the website.
You can use the calculator whenever you need to calculate an age or check a date. For privacy, avoid entering personal information into websites unless you understand how the information is handled.
Calculate Your Age Today
Ready to find your exact age? Enter your date of birth into our free online Age Calculator and choose the date you want to calculate your age at. View your age in years, months, and days, explore total time measurements, and check when your next birthday will arrive.
The tool makes date calculations simple, quick, and convenient, whether you are checking your current age or calculating how old you were on a particular date.
Disclaimer: This calculator is intended for general informational purposes. For official age verification or legal requirements, use the date-calculation rules specified by the relevant authority.