Get age from Birthdate [duplicate]

Question

Possible Duplicate:
Calculate age in JavaScript

In some point of my JS code I have jquery date object which is person's birth date. I want to calculate person's age based on his birth date.

Can anyone give example code on how to achieve this.

Answer 1

Try this function...

function calculate_age(birth_month,birth_day,birth_year) {     today_date = new Date();     today_year = today_date.getFullYear();     today_month = today_date.getMonth();     today_day = today_date.getDate();     age = today_year - birth_year;      if ( today_month < (birth_month - 1))     {         age--;     }     if (((birth_month - 1) == today_month) && (today_day < birth_day))     {         age--;     }     return age; } 

OR

function getAge(dateString)  {     var today = new Date();     var birthDate = new Date(dateString);     var age = today.getFullYear() - birthDate.getFullYear();     var m = today.getMonth() - birthDate.getMonth();     if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate()))      {         age--;     }     return age; } 

[See Demo.][1] [1]: http://jsfiddle.net/mkginfo/LXEHp/7/

Answer 2

JsFiddle

You can calculate with Dates.

var birthdate = new Date("1990/1/1"); var cur = new Date(); var diff = cur-birthdate; // This is the difference in milliseconds var age = Math.floor(diff/31557600000); // Divide by 1000*60*60*24*365.25