How to calculate the date someone turns a certain age in Excel
Formula (Excel and Google Sheets)
=EDATE(B2,12*$F$1)Move the birth date forward 12 months per year: =EDATE(B2,12*$F$1), with the age in F1.
- Result on the example
- one result per row in
C2, filled down toC6 - Works in
- Every current version
- Google Sheets
- Same formula
See it work
The formula is already in C2, filled down to C6. Change any input and the result updates, or edit the formula to experiment.
How it works
EDATE moves the birth date forward 12 months for every year, landing on the birthday of that age. A February 29 birthday lands on February 28 in a common year, so Linda turns 65 on February 28, 2025.
=EDATE(B2,12*$F$1)Result3/14/2026 (46095)
B23/14/1961The value in B2.
$F$165The value in F1.
12*$F$1780The * operator multiplies.
EDATE(B2,12*$F$1)3/14/2026 (46095)EDATE: Date a number of months before or after.- start_date
B23/14/1961 - months
12*$F$1780
- start_date
In Google Sheets
The same formula works in Google Sheets: =EDATE(B2,12*$F$1). We ran it in Google Sheets mode on the same data and it returns the same results.
Other ways to do it
Each one was run on the same example sheet.
| Formula | Result | When to use it |
|---|---|---|
| =DATE(YEAR(B2)+$F$1,MONTH(B2),DAY(B2)) | 3/14/2026, 11/2/2027, 3/1/2025…Different result | Adds the years to the year part. A February 29 birthday rolls to March 1. Linda turns 65 on March 1, 2025. |
Common mistakes
- Adding 65*365 days falls short by the leap days in between, about 16 days.
- Some benefit rules treat you as reaching an age the day before your birthday, as US Social Security does. Subtract 1 if yours does.
Try it yourself
Same data, empty answer cell. Your formula is graded instantly, then re-checked on changed data, so a typed-in number won't pass.
Calculate the date someone turns a certain age
C2, return the date each person reaches the age in F1, and fill down to C6.Questions
How do I get the first of the month of that birthday?
=EOMONTH(EDATE(B2,12*$F$1),-1)+1.
How old is someone on a given date?
=DATEDIF(B2,date,"y").
Checked by running on 2026-10-30: every formula and result on this page was calculated by the Spreadsheet Practice formula engine, in both Excel and Google Sheets modes.