Calculate Your Exact Age
Find your age in years, months and days in seconds. Choose your date of birth and the date you want to calculate your age on.
Age Calculator
Enter both dates below to calculate your age.
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Date calculations are provided for general informational use. Check official rules when an exact age is needed for legal or other formal purposes.
Age Calculator Guide
Read the guide below to learn about age calculation, date formats, leap years and common questions.
Try our Free Age Calculator to calculate your exact age in years, months and days.
An Age Calculator is a handy online tool that helps people calculate their exact age using their date of birth as well as other prominent dates. People no longer have to physically count the number of years they’ve lived and then remember the number of months and days that have passed. With their date of birth, they can now easily find out their age in a matter of seconds.
Age is an essential element of our day to day activities. People fill their age when signing official documents and when they are filling forms to apply for admission to various learning institutions. With an age calculator, people can easily find out their age using a calendar where they pick two dates.
The best age calculators, give a person’s age in various forms including years, months and days. Other calculators provide a person’s age in terms of total number of months and weeks. The varying results provide the users with the flexibility to pick the format of their choice.
Age calculators are very simple to use. People can use them to find their own age or the age of their relatives and friends. Other calculators even give a person’s age in the future.
What is an Age Calculator?
Age Calculator is a tool that helps find a person’s age by subtracting their date of birth from the chosen date. If the chosen date is the current date, then that result represents a person’s current age.
To show how the calculator works, let’s say the calculator has to work out how old someone is who was born on the 15th March 2000 on the 23rd October 2026. The calculator takes the 2 dates and does a date calculation to find completed years, months and days.
To properly calculate someone’s age you have to take into consideration their birth month and if that month occurred this year. You also have to take into consideration the difference in length of months and leap years.
This type of calculator is convenient for the general public because ages can be varied. Students, parents, professionals and anyone else has to determine age based on dates from time to time.
An age calculator is a simple calculator where you enter your birth date and the calculator shows your age. Some age calculators let you determine your age as of a certain date in the past or future. This type of calculator has to account for all 365 days of the year.
To calculate a person’s age you have to take into consideration the variations of the calendar like a leap year. Also, February can be 28 or 29 days. The other months can be 30 or 31 days.
To calculate your age online, you have to put in your date of birth which requires simple addition and subtraction.
How to Calculate Your Age Online
1. Open Age Calculator
Choose your preferred age calculator, and open it. Check that the field for the date is set to display the format the way you want it.
2. Enter Your Birth Date
Enter your birth day, month and year. Be careful and don’t switch the month and date if the calculator uses a different order of dates.
3. Set the Date
To find your age with respect to the present, you don’t have to do anything. To find it with respect to a different date, you should use that date, provided the calculator permits it.
4. Calculate Your Age
Press the button that says ‘calculate.’ The age calculator will do the computation, and display the answer.
5. Confirm Age
The calculator will display your age in years, months and days. Confirm your birthday if the answer is incorrect.
Reverse the order of entering elements of the date, if that is permitted. Otherwise, enter in the conventional order.
Age in Years, Months and Days
An aspect of an age calculator that makes it very useful, is the fact that it shows age in years, months and days, as opposed to showing it as an integer.
Years shows how many complete calendar years have elapsed since a person was born.
Months and Days: Additional months and days, if any, after the completed years will be shown as well.
Example: If a person is calculated to be 26 years, 7 months and 8 days, it means that person is 26 years, 7 months and 8 days complete.
This is a more detailed way of stating a person’s age. This detail can come in handy when you want to confirm a person’s age for documentation, determine the difference in age between two people or in cases where more detailed age is required.
The answer will depend on the dates that are compared. This means for a person to always have the right age in exact years, months and days, calculation date has to be included as well.
Why Is An Age Calculator Useful?
Age calculator is very useful in simplifying date calculations. It is time consuming and tedious to do some of these calculations.
Personal Age Checking
Some people want to know their age in months and days and not in whole years. Age calculator can help in giving this information.
Educational Purpose
Teachers and parents can use examples related to age to illustrate basic calculations, dates, elapsed time and calendars. Students can also learn about these concepts using age calculation.
Forms and Applications
On many forms, users are required to enter their age or date of birth. An age calculator can help determine a person's age and/or enter it in the correct format. However, in formal situations, such as with applications or records, the rules and conditions vary, and the user must adhere to the rules stipulated by the organization.
Personal Records
In the case of a person’s own records, age can be calculated, important dates recorded, and milestones remembered.
Planning
Age calculations are extremely helpful in making plans for important dates, events, and milestones in a person’s life. Calculations can even help figure out how old a person will be for a special event.
Age Calculator for Different Birthdates
The age calculator can be used for any and all valid birth dates. It doesn't matter if a person was recently or previously born, the process remains the same.
How to Calculate a Child’s Age
Number of months can be a better way to describe age for young children, compared to years.
How to Calculate a Teenager’s Age
A teenager can find out their age with the calculator and find out how many days are left for their birthday.
How to Calculate an Adult’s Age
Some adults can also use the tool to plan their birthday and other events. It is very helpful when an exact number of months and days are required.
Calculating the Age of an Older Person
People born decades ago have their age calculated in the same way as people born recently. A calculator compares a person’s birthdate with a chosen reference date, and shows the time period that elapsed since the birthdate.
Results Correctness Check
It does not matter if a person is old or young; it is always important for the users of the tool to enter correct dates and evaluate the results of a calculation. This is especially important for results of a calculation that can affect the users of the tool legally, or for some other important purpose.
Leap Years and Age Calculation
For an accurate calculation of dates, we should take into account the existence of leap years. According to the Gregorian calendar, a year is a leap year if it is evenly divisible by four, but not for century years. A century year is a year that is evenly divisible by four hundred.
A leap year adds an extra day to the month of February, which is 29 days in a leap year and 28 days in an ordinary year. An extra day in February can affect the dates that come after February. For a person born in February 29 (a leap year day), they don’t have a birthday for ordinary years, and an age calculator should consider leap years and compare dates consistently. However, for a legally required age, users should check the rules of that case.
PAST & FUTURE AGE CALCULATOR
Some age calculators let users input specific dates rather than using the current date.
How Old Were They On That Date?
Some users may be interested in learning how old a person was on a specific date in the past. Examples may include determining the age of a person on the date of a particular event or the date of a person’s document.
For this type of calculation, the user would enter a person’s birth date and select the past date of interest. The calculator will tell the user what a person’s age was on that past date of interest, provided that the past date of interest is not earlier than the person’s birth date.
How Old Will They Be On That Date?
A user may want to know how old a person will be in the future to determine if that person will be able to do something, for example, will a person be able to purchase alcohol in the future?
In this case, a user would enter a person’s birth date and select a future date of interest. The calculator will tell the user what the person’s age will be on that future date of interest.
Not all age calculators can determine ages for dates in the past and future. See if the calculator you want can do that before buying it.
The Meaning of Age and Date of Birth
A person’s date of birth is the day they were born, and that day does not change. Each person has a unique date of birth. Age is the difference between a person’s date of birth and the present time or date.
A 1-year-old and a 7-year-old have a difference of 6 years in their age, and both completed ages are 1. Likewise a 5-year-old and a 2-year-old, born in the same year have a difference in their age, and 2-year-old completed age is 3.
An age calculator works by subtracting a date of birth with another date.
Common Age Calculation Mistakes
Although determining ages is a simple task, people can still make mistakes and get wrong answers.
Neglecting Birth Month
A common mistake is that to calculate someone’s age, people subtract their birth year from the current year. This is not always right. The person may be one or more years younger than that.
Using wrong date format
There are various format for dates. Some people may use mm/dd/yy format, while others may use dd/mm/yy format. Using a format that is not common may yield the wrong answer.
Not Considering Leap Day
Some calculators do not consider Leap Year. Not considering Leap Year may yield the wrong answer.
Not Checking Target Date
There may be a difference between the age calculator's target date and the current date. Please verify your target date for accuracy.
Expressing Age in Decimal Form
Though 25.5 years is expressed in decimal form, an age of 25 years and 6 months is still different and more accurate way of representing the same.
In order to avoid the aforementioned mistakes, be more precise while calculating age.
Is an Online Age Calculator Accurate?
An age calculator is accurate if it uses the right technique to calculate dates and enters the input dates correctly.
Leap days, calendars, how target dates are entered, and which date system is employed can lead to inaccuracy in age calculation.
Because of these inaccuracies, user should calculate his/her age only for informal, personal use and only if it is absolutely necessary. User should comply with legal, medical, financial and other official requirements.
Privacy and Safety When Using an Age Calculator
A user's date of birth is personal information. In order to use an age calculator, user is required to enter his/her date of birth and target date.
Before using an online calculator, check the website's privacy policy, if provided.
When possible, avoid entering personal information.
Determine whether the calculator has a terms of service and/or privacy policy. Determine whether the calculator explains how it processes the information a user inputs.
Do not use an online calculator unless absolutely necessary.
Your social security number, driver's license, and birth certificate are not required to perform simple age verification.
There is no reason a simple calculator should require your social security number or other personal information to perform a simple age calculation.
Frequently Asked Questions About Age Calculator
What is an Age Calculator?
This online tool helps compute the difference in years, months and days between your date of birth and the chosen or selected date.
How can I calculate my age?
To get the difference in age, enter your date of birth in the birth date field, enter the selected or target date and click the 'Calculate' button. For getting the present age, the selected or target date should be today.
Can I calculate my age in days?
Yes. The total days count is total of days of years and months.
Can I calculate the age of other people?
Yes, if you have their date of birth, you can use the tool to get their age.
Does an age calculator consider leap year?
An age calculator that uses dates must consider Leap Year. Dealing with the 29th of February may depend on settings of the calculator.
Can I calculate the age in the future?
Yes. Some age calculators allow you to calculate the age in future.
Why doesn't the age calculator work?
There are a few reasons. First, the format of the birth date has to be the same as the target date. Different dates can also be formatted differently. For example, for birthdays that occur on February 29, an age calculator that doesn't take leap years into account would report an incorrect age.
Is it free to use the age calculator?
Yes, it is completely free to use. Of course, there could be different terms of use for different tools, so it's a good idea to check those out.
Is it safe to use the age calculator?
Yes, it's very safe to use. Depending on the website or app, you might have to download a browser extension or app.
Is an age calculator legitimate?
An age calculator is just one way to determine your age. For official documents, or other situations where rules govern eligibility, it is best to comply with the rules established by the requesting organization.
In a Nutshell
An age calculator is a way to determine age using a computer. This can be helpful when calculating age without having to perform manual calculations using a calendar.
When using an age calculator to determine your age, or the age of a family member or friend, all that is required is to enter the correct birth date, select the date for which the age is being determined, and check the result.
A calculator can be used for an approximate age determination, however, for an official calculation, it is a good practice to always verify the result.