How to only allow negative numbers in Excel?

In Excel, how to only allow negative numbers entered? This article will introduce some useful and quick tricks for you to solve this task.

Only allow negative numbers in Excel with Data Validation

Only allow negative numbers in Excel with VBA code


arrow blue right bubble Only allow negative numbers in Excel with Data Validation

Normally, the Data Validation function can help you, please do as follows:

1. Select the cells or column that you want to allow only negative numbers entered, and then click Data > Data Validation > Data Validation, see screenshot:

doc only allow negative 1

2. In the Data Validation dialog box, under the Settings tab, do the following options:

(1.) In the Allow section, choose Decimal from the drop down list;

(2.) In the Data section, please choose less than or equal to option;

(3.) At last, enter the number 0 into the Maximum text box.

doc only allow negative 2

3. Then click OK, and now, only negative numbers and 0 are allowed to be entered, if positive number entered, it will display a warning message, see screenshot:

doc only allow negative 3


arrow blue right bubble Only allow negative numbers in Excel with VBA code

Here is a VBA code also can help you, with the following code, when you enter a positive number, it will be converted to negative automatically, please do as follows:

1. Right click the sheet tab that you want to allow only negative numbers, and choose View Code from the context menu, in the popped out Microsoft Visual Basic for Applications window, please copy and paste the following code into the blank Module:

VBA code: Only allow negative numbers in worksheet:

Private Sub Worksheet_Change(ByVal Target As Range)
'Updateby Extendoffice
    Const sRg As String = "A1:A1000"
    Dim xRg As Range
    On Error GoTo err_exit:
    Application.EnableEvents = False
    If Not Intersect(Target, Range(sRg)) Is Nothing Then
        For Each xRg In Target
            If Left(xRg.Value, 1) <> "-" Then
                xRg.Value = xRg.Value * -1
            End If
        Next xRg
    End If
err_exit:
    Application.EnableEvents = True
End Sub

doc only allow negative 4

Note: In the above code, A1:A1000 is the cells that you want to only input negative numbers input.

2. Then save and close this code, go back the worksheet, and now, when you enter some positive numbers into the cells you specified in the code, the positive numbers will be converted to negative ones automatically.


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.
  • To post as a guest, your comment is unpublished.
    FC · 7 months ago
    How do I change the automatic formatting with this code from Currency to Accounting ?
  • To post as a guest, your comment is unpublished.
    GB · 1 years ago
    Hi! Great article. One question: if, instead of a coherent group of cells, I want to apply this in different parts of the sheet (e.g. A1:A2 AND A6:A8), is there a way to do that with the VBA solution? I.e.: how do I replace the "A1:A1000" with several sets of cells?
    • To post as a guest, your comment is unpublished.
      skyyang · 11 months ago
      Hello, GB,
      To apply this code for multiple ranges, please use the following code:

      Note: when using this code, first, you should right click the sheet tab, and then click View code from the context menu, and then copy the following code into the module.

      Private Sub Worksheet_Change(ByVal Target As Range)
      'Updateby Extendoffice
      Const sRg As String = "A1:A10,B1:B10,C1:C20" 'Separate the ranges by commas
      Dim xRg As Range
      Dim xSRg As Range
      On Error GoTo err_exit:
      Application.EnableEvents = False
      Set xSRg = Range(sRg)
      If Not Intersect(Target, xSRg) Is Nothing Then
      For Each xRg In Target
      If Left(xRg.Value, 1) <> "-" Then
      xRg.Value = xRg.Value * -1
      End If
      Next xRg
      End If
      err_exit:
      Application.EnableEvents = True
      End Sub

      Please try, hope it can help you!
      • To post as a guest, your comment is unpublished.
        GB · 10 months ago
        Super, thanks! Very helpful.