Years Months Days Calculator



Calculating the duration between two dates can be a complex task, especially when you want the result in years, months, and days. To simplify this process, a Years Months Days Calculator can be a handy tool. In this article, we’ll explore how to use this calculator and provide a working HTML and JavaScript code to implement it on your website.

How to Use

Using the Years Months Days Calculator is straightforward. Input the start and end dates, click the “Calculate” button, and the result will display the duration in years, months, and days. This tool is valuable for various applications, such as age calculations, project timelines, and event planning.


The accurate formula for calculating the duration in years, months, and days involves considering the leap years and varying month lengths. The following formula is commonly used:


Suppose we want to calculate the duration between January 1, 2020, and December 31, 2022. Using the formula mentioned above, the result would be:

  • Years: 2
  • Months: 11
  • Days: 30


Q: Is the calculator accurate for leap years?
A: Yes, the calculator accounts for leap years in the calculation, providing accurate results.

Q: Can I input any date format?
A: The calculator supports standard date formats (e.g., YYYY-MM-DD) to ensure accurate calculations.

Q: What if I input a future end date?
A: The calculator will still provide accurate results, considering the future date as the end point.

Q: How are months and days calculated?
A: Months and days are calculated based on a standard month length of 30 days.


The Years Months Days Calculator is a versatile tool for anyone needing precise date duration calculations. By implementing the provided HTML and JavaScript code, you can easily integrate this calculator into your web applications.

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