Our Age Calculator Online helps you calculate age from date of birth instantly with 100% accuracy. Whether you’re checking your current age, verifying eligibility for forms, or just curious, this tool gives your exact age in years, months, and days in seconds. No manual math—just enter your date of birth and get your result instantly!
What Is an Age Calculator?
An age calculator is an online tool that computes the time elapsed between a person’s date of birth and a reference date (usually today). Instead of manually figuring out years, months, and days, you simply enter your birthdate (and optionally current date), and the tool returns your precise age—usually broken down into years, months, days (and sometimes hours).
Using an age calculator is far easier and less error-prone than manual calculations, especially when dealing with leap years, varying month lengths, and date edge cases.
How It Works (Methodology)
Input your date of birth (day, month, year).
Optionally, input the current date (defaults to today) or a target date (e.g. for future planning).
The calculator computes the difference in years, months, and days:
First, it calculates full years by subtracting year values and adjusting if the month/day hasn’t been reached yet.
Then it computes remaining months, adjusting for month lengths.
Finally, it computes remaining days, taking into account the number of days in the relevant month (including leap year adjustments).
It outputs a result such as:
You are 32 years, 5 months, and 17 days old.
Some calculators also show age in total days, age in hours, or time until your next birthday.
Why Use an Online Age Calculator?
Quick and accurate: No manual errors.
Handles complexities: Leap years, varying month lengths, edge cases.
Planning & milestones: Useful for legal age checks, eligibility requirements (voting, driving, retirement), birthday countdowns, or age comparisons.
For fun & curiosity: Find out your exact age to the day, or compare with others.
Versatility: Some versions allow comparison between two dates (e.g. age difference between two people).
🧭 Frequently Asked Questions (FAQ)
How to calculate age?
You can calculate age by finding the time difference between your date of birth and the current date.
Manually, subtract your birth year from the current year, and then adjust based on whether your birthday has passed this year or not.
However, the easiest and most accurate way is to use an online age calculator, which instantly gives your exact age in years, months, and days.
How to calculate age of a person?
To calculate a person’s age, you need two dates:
The person’s date of birth
The current date (or any specific date you want to compare)
An age calculator automatically computes this difference and gives a precise result. For example, if someone was born on 10 October 1990, and today’s date is 5 October 2025, their age is 34 years, 11 months, and 25 days.
How to calculate age in calculator?
To calculate age using an age calculator:
Enter your date of birth in the given input box.
Click on the “Calculate” button.
The tool instantly displays your exact age in years, months, and days.
Most calculators also handle leap years and month variations, giving accurate results without any manual effort.
How to calculate age from date of birth?
To calculate age from your date of birth, follow these steps:
Note your date of birth (for example, 15 August 1995).
Find today’s date (for example, 5 October 2025).
Subtract the birth year from the current year (2025 − 1995 = 30).
If your birthday hasn’t come yet this year, subtract one year.
Your final age will be 29 years in this example.
An online age calculator does all this instantly and also shows months and days for better precision.
Why use an online age calculator instead of manual calculation?
An online age calculator is faster, more accurate, and accounts for complex details like leap years, different month lengths, and date formats.
It eliminates manual errors and saves time—perfect for official forms, eligibility checks, or just personal curiosity.
Can I calculate age between two dates?
Yes! You can calculate the difference between any two dates using an age calculator.
This is useful for finding age gaps, comparing birthdays, or calculating service periods.
Simply enter the start and end dates, and the tool will display the exact difference in years, months, and days.