Build an Accurate Age Calculator in JavaScript (Years, Months, Days)

Build an Accurate Age Calculator in JavaScript (Years, Months, Days) Many applications require calculating a user's age from their date of birth . Examples include: User registration forms School admission systems Healthcare portals HR software Instead of calculating age manually, we can build a simple and accurate age calculator using JavaScript . In this article, we'll walk through how to implement it. What is an Age Calculator? An age calculator determines the difference between a person's date of birth and the current date . A good calculator should return: Years Months Days Some advanced tools even calculate: Age in weeks Age in days Age in hours You can try a live version here: 👉 https://myclicktools.com/tools/age-calculator/ Basic Age Calculation Logic The simplest method subtracts the birth year from the current year. Example: Age = Current Year - Birth Year However this is not fully accurate , because we must check: Month difference Day difference Leap years JavaScript Age Cal