Exceljet

Quick, clean, and to the point

Multiple cells have same value

Excel formula: Multiple cells have same value
Generic formula 
=COUNTIF(rng,"<>value")=0
Summary 

To confirm that a range of cells all have the same value, you can use a formula based on the COUNTIF function. In the example shown, the formula in C9 is:

=COUNTIF(C5:C8,"<>ok")=0

Note: this formula is not case-sensitive, you can find a case-sensitive formula here.

Explanation 

This formula relies on the standard behavior of the COUNTIF function. The range is C5:C8, the criteria is provided as not equals OK:

=COUNTIF(C5:C8,"<>ok")

The COUNTIF then returns a count of any cells that do not contain "OK" which is compared to zero. If the count is zero, the formula returns TRUE. If the count is anything but zero, the formula returns FALSE.

Ignore empty cells

To ignore empty cells, you can use a more generic version of the formula:

=COUNTIF(range,value)=COUNTA(range)

This formula generates a count of all matching values, and compares that count to a count of all non-empty cells.

Author 
Dave Bruns
Related formulas 
Excel formula: Multiple cells have same value case sensitive
Multiple cells have same value case sensitive
This formula uses the EXACT formula to compare a range of cells to a single value: = EXACT ( B5:F5 , B5 ) Because we give EXACT a range of values in the first argument, we get back an array result containing TRUE FALSE values: { TRUE , FALSE , TRUE...
Excel formula: All cells in range are blank
All cells in range are blank
Working from the inside out, this formula contains an expression inside SUMPRODUCT that tests each cell in a range like so: -- ( B5:D5 <> "" ) Inside the parentheses, the result of B5:D5 "" looks like this: { TRUE , FALSE , TRUE }...
Related functions 
Excel COUNTIF function
Excel COUNTIF Function

COUNTIF is an Excel function to count cells in a range that meet a single condition. COUNTIF can be used to count cells that contain dates, numbers, and text. The criteria used in COUNTIF supports logical...

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.

500 Formulas | 101 Functions

Download 100+ Important Excel Functions

Get over 100 Excel Functions you should know in one handy PDF.