To count the duplicates in an Excel column may be easy for you, but have you ever tried to count the consecutive duplicates yet? In other words, it will count continuous duplicates and recount it from 1 if there is a break between the duplicates as below screenshot shown.
To count consecutive duplicates, just need to apply a simple formula.
1. Select an adjacent cell, B1 for instance, enter 1. See screenshot:
2. In the next cell below 1, B2 for instance, enter this formula =IF(A2=A1,B1+1,1), then drag autofill handle down to the cells to apply this formula. See screenshot:
Note: in the formula, A1 and A2 is the first two values in the list you want to count consecutive duplicates, B1 is the cell you enter number 1 in the first step, you can change them as you need.
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Count consecutive duplicates with formula
