How to calculate age before 1/1/1900 in Excel?

In Excel, the date before 1/1/1900 cannot be entered and calculated correctly. If you want to calculate the age of a person who was born and died before 1/1/1900, that would not get the correct calculation in Excel generally. But here in this article, a trick can help you to calculate the age before 1/1/1900 in Excel.

Calculate age before 1/1/1900 with VBA

Calculate age by birthday with Kutools for Excel good idea3


arrow blue right bubble Calculate age before 1/1/1900 with VBA

Here is a VBA code can help you to quickly calculate the age before 1/1/1900.

1. Select a blank cell and enter the birthday of the person, and then select another cell to enter the date of today, or the date of person die as you need. See screenshot:
doc calculate age before 1900 1

2. Then press Alt + F11 keys to enable Microsoft Visual Basic for Applications window.

3. Click Insert > Module, paste below VBA to the new Module window.

VBA: Calculate age before 1/1/1900

Public Function AgeFunc(SDate As Variant, EDate As Variant) As Long
'UpdatebyExtendOffice20160429
    Dim xSMonth As Integer
    Dim xSDay As Integer
    Dim xSYear As Integer
    Dim xEMonth As Integer
    Dim xEDay As Integer
    Dim xEYear As Integer
    Dim xAge As Integer
    If Not GetDate(SDate, xSYear, xSMonth, xSDay) Then
        AgeFunc = "Invalid Date"
        Exit Function
    End If
    If Not GetDate(EDate, xEYear, xEMonth, xEDay) Then
        AgeFunc = "Invalid Date"
        Exit Function
    End If
    xAge = xEYear - xSYear
    If xSMonth > xEMonth Then
        xAge = xAge - 1
    ElseIf xSMonth = xEMonth Then
        If xSDay > xEDay Then xAge = xAge - 1
    End If
    If xAge < 0 Then
        AgeFunc = "Invalid Date"
    Else
        AgeFunc = xAge
    End If
End Function

Private Function GetDate(ByVal DateStr As String, Y As Integer, M As Integer, D As Integer) As Boolean
    Dim I As Long
    Dim K As Long
    Y = 0
    M = 0
    D = 0
    GetDate = True
    On Error Resume Next
    I = InStr(1, DateStr, "/")
    M = CLng(Left(DateStr, I - 1))
    D = CLng(Mid(DateStr, I + 1, InStr(I + 1, DateStr, "/") - I - 1))
    Y = CLng(Right(DateStr, Len(DateStr) - InStrRev(DateStr, "/")))
    If M < 1 Or M > 12 Or D < 1 Or D > 31 Or Y < 1 Then
        GetDate = False
    End If
End Function

4. Select a blank cell, here is C2, and enter this formula =AgeFunc(A2,B2) (A2 is the birthday, and the B2 is the end date), and press Enter key to get the age, and drag autofill handle to over the cells you need. See screenshot:
doc calculate age before 1900 2

Note: This VBA can only calculate ages with dates in the format of mm/dd/yyyy, such as 6/23/1845.


arrow blue right bubble Calculate age by birthday with Kutools for Excel

If the birthday dates are normally after 1/1/1900, you can apply Kutools for Excel’s Date & Time helper utility, which can quickly calculate the age by the given birthdays.

Kutools for Excel, with more than 300 handy functions, makes your jobs more easier. 

After free installing Kutools for Excel, please do as below:

1. Select a blank cell you want to output the age, and click Kutools > Formula Helper > Date & Time helper. See screenshot:
doc calculate age before 1900 3

2. Then in the Date & Time helper dialog, check Age option, select the birthday you want to calculate age based on to the Date of Birth textbox, default, the cell will be selected as absolute reference, you can change it to relatiev reference, then check Today option and choose one result type you want to show in the drop-down list of Output result type. See screenshot:
doc calculate age before 1900 4

3. Click Ok to apply this formula, and now you can see the age has been shown. And if you need, you can drag the autofill handle to over the cells needed this formula. See screenshot:
doc calculate age before 1900 5


The Best Office Productivity Tools

Kutools for Excel Solves Most of Your Problems, and Increases Your Productivity by 80%

  • Reuse: Quickly insert complex formulas, charts and anything that you have used before; Encrypt Cells with password; Create Mailing List and send emails...
  • Super Formula Bar (easily edit multiple lines of text and formula); Reading Layout (easily read and edit large numbers of cells); Paste to Filtered Range...
  • Merge Cells/Rows/Columns without losing Data; Split Cells Content; Combine Duplicate Rows/Columns... Prevent Duplicate Cells; Compare Ranges...
  • Select Duplicate or Unique Rows; Select Blank Rows (all cells are empty); Super Find and Fuzzy Find in Many Workbooks; Random Select...
  • Exact Copy Multiple Cells without changing formula reference; Auto Create References to Multiple Sheets; Insert Bullets, Check Boxes and more...
  • Extract Text, Add Text, Remove by Position, Remove Space; Create and Print Paging Subtotals; Convert Between Cells Content and Comments...
  • Super Filter (save and apply filter schemes to other sheets); Advanced Sort by month/week/day, frequency and more; Special Filter by bold, italic...
  • Combine Workbooks and WorkSheets; Merge Tables based on key columns; Split Data into Multiple Sheets; Batch Convert xls, xlsx and PDF...
  • More than 300 powerful features. Supports Office/Excel 2007-2019 and 365. Supports all languages. Easy deploying in your enterprise or organization. Full features 30-day free trial. 60-day money back guarantee.
kte tab 201905

Office Tab Brings Tabbed interface to Office, and Make Your Work Much Easier

  • Enable tabbed editing and reading in Word, Excel, PowerPoint, Publisher, Access, Visio and Project.
  • Open and create multiple documents in new tabs of the same window, rather than in new windows.
  • Increases your productivity by 50%, and reduces hundreds of mouse clicks for you every day!
officetab bottom
Say something here...
symbols left.
You are guest ( Sign Up? )
or post as a guest, but your post won't be published automatically.
Loading comment... The comment will be refreshed after 00:00.

Be the first to comment.