Count the number of unique letters in a cell?

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Press Ctrl+` to show all formulas. Press it again to toggle back to numbers. The grave accent is often under the tilde on US keyboards.
Assuming that the letters are not separated by a space, comma, etc., try the following formulas that need to be confirmed with CONTROL+SHIFT+ENTER...

Case-sensitive:

=SUM(IF(FREQUENCY(CODE(MID(A2,ROW(INDIRECT("1:"&LEN(A2))),1)),CODE(MID(A2,ROW(INDIRECT("1:"&LEN(A2))),1))),1))

Case-insensitive:

=SUM(IF(FREQUENCY(CODE(MID(UPPER(A2),ROW(INDIRECT("1:"&LEN(A2))),1)),CODE(MID(UPPER(A2),ROW(INDIRECT("1:"&LEN(A2))),1))),1))

Note that if the text string contains numbers they'll be evaluated as well.

Hope this helps!
 
Upvote 0
HI PATSYS:

Or

Using the UNIQUEVALES function from the MoreFunc Add-in

=COUNT(CODE(UNIQUEVALUES(MID(A2,ROW(INDIRECT("1:"&LEN(A2))),1))))
 
Upvote 0

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