This post describes a User Defined Function that searches multiple ranges and adds corresponding values across worksheets in a workbook.

A User defined function is a custom function that anyone can build and use, you simply copy the code below and paste it to a code module in your workbook

This custom function works like the SUMIF function except that you can use multiple lookup and sum ranges.

Formula in cell C4:

User Defined Function Syntax

SUMIFAMS(lookup_value, lookup_range, sum_range)

Arguments

VBA code

'Name function and arguments
Function SUMIFAMS(lookup_value As Range, ParamArray cellranges() As Variant)
'Declare variables and data types
Dim i As Integer, rng1 As Variant, temp As Single, a As Boolean
Dim rng2 As Variant, value As Variant, j As Single

'Make sure that the number of cell ranges are an even number. There must be a lookup_range and a sum_range.
If (UBound(cellranges) + 1) Mod 2 <> 0 Then
  'Display a message box.
  MsgBox "The number of range arguments must be even. 2, 4 , 8 ... and so on"
  'End function so the user can correct the problem.
  Exit Function
End If
'Iterate through all cell ranges
For i = LBound(cellranges) To UBound(cellranges) Step 2
    'Check that the number of rows in both cell ranges match
    If cellranges(i).Rows.Count <> cellranges(i + 1).Rows.Count Then
        MsgBox "The number of rows in range arguments don't match."
    End If
    'Make sure that the ranges only contain one column
    If cellranges(i).Columns.Count <> 1 Then
        MsgBox "Range arguments can only have size one column each."
        Exit Function
    End If
    'Save ranges to an array variable
    rng1 = cellranges(i).value
    rng2 = cellranges(i + 1).value
    'Iterate through values in array variable
    For j = LBound(rng1) To UBound(rng1)
        'Iterate through each lookup value if there are more than one
        For Each value In lookup_value
            'Make a comparison (not case sensitive)
            If UCase(rng1(j, 1)) = UCase(value) Then a = True
        Next value
        'Add corresponding number to temp variable if a= True
        If a = True Then temp = temp + rng2(j, 1)
        a = False
    Next j
Next i
'Return total to worksheet
SumifAMS = temp
End Function

Where to copy vba code?

1. Press Alt-F11 to open visual basic editor
2. Click Module on the Insert menu
3. Copy and paste vba code.
4. Exit visual basic editor

You can also use multiple search values, the returned number is a total based on both search values.