## Chronological Age

**How to calculate...**

- You will need the date of assessment (DOA) and date of birth (DOB).
- Convert these dates in this order... Year, Month, Day.
- Using the converted dates, subtract the DOB from the DOA.
- Multiply the number of years by 12 and add to the number of months. If there are 15 or more days, add 1 more month to the age. This will give you the child's chronological age.

**If the calculation is not possible without "borrowing," borrow these amounts...**

- If you need more days, borrow 1 month from the months column and add 30 extra days to the days column.
- If you need more months, borrow 1 year from the years column and add 12 extra months to the months column.

*Note... The DOA is the date that the assessment ended, not when it began. There should be no more than 2 weeks between assessment start to end without rechecking any items the child was unable to complete.*

**Quick and easy calculation...**

Visit the Pearson site and plug in your information...

**http://www.pearsonassessments.com/hai/Images/ageCalculator/ageCalculator.htm**

**Want to practice? Calculate the following examples and compare your age to the answers.**

#1

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#2

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#3

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