Age Calculator
Calculate your exact age between two dates
Age Calculator
Looking to find your exact age in years, months, weeks, days, hours, minutes, and even seconds? Our Age Calculator is a free and easy-to-use online tool that instantly calculates age from your date of birth. Whether you want to know how old you are today, how many days you have lived, or the time difference between two dates, this calculator gives accurate results within seconds.
What is an Age Calculator?
“An Age Calculator is a simple digital tool that calculates a person’s age based on the date of birth (DOB). It shows age in multiple formats such as:”
• Years, months, and days
• Only months and days
• Total weeks lived
• Total days lived
• Total hours, minutes, and even seconds
This makes it more than just a birthday calculator – it is a complete age tracking tool.
Birthday Calculator
With this calculator, you can instantly know you quickly calculate your exact age and find important details about your birthday. By entering your date of birth, you can instantly know:
Your exact age in years, months, and days
The day of the week you were born
How many days are left until your next birthday
Your chronological age in weeks, days, hours, minutes, and even seconds
Whether you are planning a birthday celebration or simply curious about your life timeline, a birthday calculator gives you accurate results in seconds.
Age Calculator Formula
“An age Calculator Formula is a simple mathematical method used to calculate the exact age of a person from their date of birth (DOB) to the current date (or any specific date). This calculation is widely used in schools, government documents, competitive exams, and even in personal record-keeping.”
With this guide, you will learn the exact formula for age calculation, along with examples.
General Formula to Calculate Age
The basic age formula is:
Age = Current Date Date – of Birth
This formula finds the difference between the current date and the given date of birth. However, since dates involve year, month, and day values, we use a more structured formula.
Exact Age Calculator Formula (Years, Months, Days)
1. Years:
Years = Current Year – Birth Year
2. Months:
Months = Current Month – Birth Month
3. Days:
Days = Current Day – Birth Day
Example of Age Calculation
Suppose:
• Date of Birth = 15 August 1995
• Current Date = 17 September 2025
Step 1: Calculate Years
2025 − 1995 = 30 years
Since September (09) is greater than August (08), no adjustment needed.
Step 2: Calculate Months
September − August = 1 month
Step 3: Calculate Days
17 − 15 = 2 days
✅ Final Answer: 30 years, 1 month, 2 days
How to Age Calculator
“An Age Calculator is a smart tool that helps you calculate your exact age from your date of birth (DOB). Many people search for “how to age calculator”, meaning they want to know how to use one, or how to make one for their website or app.”
In this article, we will explain:
• How to use an age calculator online
• The basic age calculation formula
• How to create your own age calculator (Excel, JavaScript, or Python)
How to Use an Age Calculator Online
Using an online age calculator is simple:
1. Enter your Date of Birth (DOB)
2. Select the Current Date (usually today’s date is auto-selected)
3. Click Calculate
4. Instantly get your exact age in Years, Months, Days – plus weeks, hours, minutes, and seconds
💡 Example:
• DOB: 10 January 2000
• Current Date: 17 September 2025
Result: 25 years, 8 months, 7 days
FAQs
How do I calculate age in years, months, and days?
You can calculate age in years, months, and days by finding the exact difference between your date of birth and the current date (or any given date). This involves subtracting the two dates and accounting for leap years, months with different days, and the day count.
The easiest way is to use an online Age Calculator, which instantly shows your exact age in years, months, and days without manual effort. For example, if you were born on 1st January 2000 and today’s date is 1st January 2025, the calculator will show your age as 25 years, 0 months, and 0 days.
age calculation formula in Excel
To calculate age in years:
=DATEDIF(Date_of_Birth, TODAY(), “Y”)
To calculate age in years and months:
=DATEDIF(Date_of_Birth, TODAY(), “Y”) & ” Years, ” &
DATEDIF(Date_of_Birth, TODAY(), “YM”) & ” Months”
To calculate age in years, months, and days:
=DATEDIF(Date_of_Birth, TODAY(), “Y”) & ” Years, ” &
DATEDIF(Date_of_Birth, TODAY(), “YM”) & ” Months, ” &
DATEDIF(Date_of_Birth, TODAY(), “MD”) & ” Days”
This formula is widely used for HR, school records, financial planning, and anywhere exact age calculation is required.
age calculation formula
The age calculation formula is based on finding the difference between the date of birth (DOB) and the current date (or any given date). In simple terms:
Age = Current Date – Date of Birth
• In Years: Count the total number of completed years from DOB to the current date.
• In Months: Calculate the total number of months after subtracting full years.
• In Days: Count the remaining days after subtracting full months.
For example, if someone was born on 1st January 2000 and today’s date is 16th September 2025, the age will be 25 years, 8 months, and 15 days.
Online Age Calculators use this formula automatically, saving you from manual calculations and ensuring accurate results even with leap years.
What is age calculation online?
Age calculation online refers to using a digital Age Calculator tool to find the exact age from your date of birth (DOB) to the current date. These online calculators instantly provide results in years, months, and days, saving you from manual date difference calculations.
You simply enter your date of birth (and sometimes the end date, if not today), and the tool automatically shows your accurate age. Many online calculators also display age in weeks, hours, minutes, and even seconds.
Online age calculators are widely used for official forms, job applications, school admissions, pension calculations, and health or fitness records, as they provide quick and error-free results.