Age Calculator By Months



Calculating age is a common task, and when precision matters, an age calculator by months becomes a valuable tool. This article provides a step-by-step guide on how to use and implement an accurate age calculator using HTML and JavaScript.

How to Use

To use the age calculator, input the birthdate in the designated field. The calculator will then provide the age in months when you click the “Calculate” button.


The formula for calculating age in months involves considering the number of months between the birthdate and the current date, accounting for leap years. The accurate formula is:


Suppose the birthdate is January 15, 1990, and the current date is January 6, 2024. Using the formula:


Q: How accurate is this age calculator by months?

A: The calculator utilizes precise formulas to calculate age, considering leap years and months accurately.

Q: Can I use this calculator for future dates?

A: No, this calculator is designed to calculate the age as of the current date.

Q: Is there a limitation on the input format?

A: The input should be in the format YYYY-MM-DD for accurate calculations.


The age calculator by months presented here offers a precise solution for determining age in months. It can be beneficial in various contexts, such as medical calculations or age-related studies.

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