Chronological Age Calculator

Overview

The Chronological Age Calculator computes a child's exact age in years, months, and days from their date of birth to a testing date. Use it to get accurate age calculations that account for leap years and varying month lengths, formatted for use in evaluations and reports.

Step-by-Step Instructions

Calculating Age

1. Navigate to Tools from the main navigation
2. Click Chronological Age Calculator
3. Enter the Date of Birth using the date picker or by typing the date
4. Enter the Testing Date (defaults to today's date)
5. The calculator automatically computes the age

Reading the Results

The calculator displays:

• Full Age: Format as years;months;days (e.g., 9;6;10)
• Age in Years: The number of years
• Age in Months: The number of months
• Age in Days: The number of days
• Cumulative Months: Total age in months

Copying Results

1. Click the Copy button next to any value to copy it to your clipboard
2. Paste the value into your evaluation or report
3. The full age format (years;months;days) is commonly used in evaluations

Understanding the Calculation

The calculator:

• Accounts for leap years when calculating age
• Handles varying month lengths correctly
• Uses component-wise subtraction (year, month, day)
• Borrows from months when days are negative
• Borrows from years when months are negative

Notes / Best Practices

• Always verify the date of birth is correct before calculating
• Use the testing date that matches when the evaluation was conducted
• The years;months;days format is standard for chronological age in evaluations
• Copy the full age format directly into reports to avoid transcription errors
• For children under one year, the calculator shows months and days appropriately

Support

If you need help getting started or have questions about using ELSA in your evaluations, our support team is here to help.