Calculate Exact Age Between Two Dates in Excel (Years, Months, and Days)

Many users don't just want the number of years—they need a complete age such as 12 Years, 5 Months, 18 Days. This is common when managing employee records, student information, patient databases, insurance policies, contracts, or membership systems.

Although Excel provides several date functions, calculating an exact age between two dates usually requires complex formulas that are difficult to remember and maintain.

With Kutools for Excel's Formula Helper Plus, you can calculate the exact age between a start date and an end date in just a few clicks—without writing a single formula.

Why Calculating Age in Excel Can Be Difficult

Age calculation is more complicated than subtracting one date from another.

A correct result needs to consider:

• Different month lengths
• Leap years
• Partial months
• Partial days

For example:

Producing this result with native Excel formulas often requires multiple nested functions.

Limitations of Excel's Built-in Solution

Excel users typically rely on DATEDIF, YEARFRAC, or combinations of YEAR, MONTH, and DAY.

However, these approaches have several drawbacks:

• DATEDIF is undocumented and difficult to remember.
• Multiple formulas are often needed to calculate years, months, and days separately.
• The formulas become long and difficult to maintain.
• Editing formulas later can be confusing.
• New users often make mistakes when referencing dates.

If you're calculating ages for dozens or hundreds of records, creating and maintaining these formulas becomes time-consuming.

Why Use Formula Helper Plus?

Formula Helper Plus simplifies formula creation by providing ready-to-use formulas organized into categories.

The Get Age from Special Date (Years, Months and Days) formula automatically calculates the exact difference between two dates and returns a result such as:

No complex formula writing is required.

Advantages

• No need to remember DATEDIF syntax
• Calculates years, months, and days together
• Supports batch calculations
• Search formulas by keyword
• Browse formulas by category
• Preview the formula before inserting

How to Calculate Age Using Formula Helper Plus

The formula is located in the Local tab of Formula Helper Plus.

1. Select the output cell (a single cell or a range).
2. Click Kutools > Formula Helper > Formula Helper Plus.

1. In the dialog:
   • Open the Local tab.
   • Select the All category.
   • Enter Age in the search box.
   • Choose Get Age from Special Date in Years, Months, Days.
   
2. Select the Start Date.
3. Select the End Date.
4. Click OK.
5. 

The age is calculated immediately.

Formula Helper Plus automatically returns the corresponding age for every row.

Customize the Formula

Formula Helper Plus isn't just a formula library.

You can also customize formulas to match your workflow better.

For each formula, you can edit:

• Formula Name
• Formula Expression
• Formula Description

This makes it easy to create company-specific formulas or maintain your own formula library.

Why Formula Helper Plus Is Better Than Excel

Common Scenarios

This formula is useful for many real-world situations, including:

• Calculating employee age
• Student age management
• Patient medical records
• Membership duration
• Insurance eligibility
• Contract periods
• Service anniversaries
• Retirement calculations

Conclusion

If you frequently need to calculate exact ages between two dates, writing complex DATEDIF formulas isn't the most efficient solution.

With Kutools for Excel's Formula Helper Plus, you can quickly find the Get Age from Special Date (Years, Months and Days) formula, specify the start and end dates, and instantly calculate accurate results in years, months, and days.

Whether you're working with a single record or hundreds of rows, Formula Helper Plus makes age calculations faster, easier, and more reliable.