How does an age calculator work?

An age calculator works by finding your age in terms of the exact number of years, months and days that you have completed since your birth till the date being calculated. Age calculators mostly follow the western system of age calculation, i.e. from one birthday to the next.

How do you calculate completed age?

You calculate your completed age in terms of the full years you have completed since your date of birth. So, if a person was born on 28 January 2001 then their completed age as of 23 September 2022 will be 21 years.

Running age refers to your age in terms of the year of your lifecycle that you are currently in. so, the running age of a person born on 28 January 2001 will be 22 years as they have completed 21 years of their life and are currently in the 22nd year of their life.

Should we say Completed age or running age?

In informal conversations and interactions, it is alright to use either completed age or running age. But in the case of formal interactions the most accurate measure is to state your full age in terms of the years, months and days completed from date of birth to a particular date.

Should I calculate my age in the DD/MM/YYYY or MM/DD/YYYY format?

It does not make much difference as to whether you are calculating your age in terms of DD/MM/YYYY or MM/DD/YYYY format because in either case, it is your date of birth that is of importance and used for calculating your age. While writing your age, it is written in the format- number of years, number of months and lastly the number of days.

Calculate Your Age To day from Birth Date

What is an Age Calculator?

An age calculator, in the simplest words, is a tool that calculates your exact age in terms of the number of years, months, and days. This tool helps you know your exact age on any given day based on the western system of age calculation, i.e., counting the years of age from one birthday to another.

How to Calculate Age?

Well, while there are many ways of calculating age based on what culture you belong to, the standard age calculation is done in terms of the Western style of age calculation.

How to calculate age based on the Western system

The idea behind age calculation in this system is very simple—calculate your chronological age from your one birthday to the next, and that makes up one year.

For example, a person born on 4 August 2022 will be one year old on 4 August 2023. Similarly, someone born on 16 January 2002 will be one year old on 16 January 2003. As of today (i.e. 23 October 2022), they will be 20 years, 8 months and 15 days old.

An easy trick is to subtract your date of birth from today's date.

Example: DOB 17 February 2001

Date Today	2022	09 (September)	23
Date Of Birth	2001	02 (February)	17
(Subtract)	-	-	-
Your Age	21 Years	7 Months	6 days

In case your birthday cannot be directly subtracted from today's date, then the calculation is slightly different. For example if your date of birth is on 27 September 2001, then you can calculate your age as follows:

Date Today	2022	09 (September)	23
Date Of Birth	2001	09 (September)	26
(Subtract)	-	-	-
Net	21 Years	0 Months	-3 days
How to Calculate	21 Years - 1 Year	12 Months - (0+1)	30 days - 3 days
Your Actual Age	20 Years	11 Months	27 days

The -3 in the date indicates that you are 3 days younger than 21 years, or in other words, you are 20 years 11 months 27 days old.

Example: DOB 15 November 2001

Date Today	2022	11 (November)	23
Date Of Birth	2001	11 (November)	15
Net	21 Years	-2 Months	8 days
Your Actual Age	20 Years	10 Months	8 days

Calculating Age in Days

The calculation of your age in terms of total number of days is also very simple. You just have to convert all the years and the months into days and add them together.

1 Year = 365 Days
1 Month = 30 Days

(21 x 365) + (3 x 30) + 5

= 7665 + 90 + 5

= 7760 days

Running Age vs. Completed Age

Completed age refers to your age in terms of the complete years from your birthday. Running age on the other hand refers to your age in terms of the current year of life.

Example: If you were born on 8 August 2002, then on 8 August 2022 you completed 20 years. From 9 August 2022, your running age is 21 years.

Days Until Next Birthday

Coming Birthday	2022	11 (November)	23
Date Today	2001	09 (September)	23
Result	0 Years	02 Months	0 days

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Calculate Your Age Today from Birth Date

Enter dates to calculate

What is an Age Calculator?

How to Calculate Age?

How to calculate age based on the Western system

Example: DOB 17 February 2001

Example: DOB 15 November 2001

Calculating Age in Days

Running Age vs. Completed Age

Days Until Next Birthday

Explore our Popular Online Course

A Quick Insight of College Vidya

FAQs on The Age Calculator

All Calculator Tools

General

Calculate Your Age Today from Birth Date

Enter dates to calculate

What is an Age Calculator?

How to Calculate Age?

How to calculate age based on the Western system

Example: DOB 17 February 2001

Example: DOB 15 November 2001

Calculating Age in Days

Running Age vs. Completed Age

Days Until Next Birthday

Explore our Popular Online Course

A Quick Insight of College Vidya

FAQs on The Age Calculator

1. How does an age calculator work?

2. How do you calculate completed age?

3. What is running age?

4. Should I calculate my age in DD/MM/YYYY or MM/DD/YYYY?

All Calculator Tools

General