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How to increment numbers when value changes in another column?

doc increment value changes 1

Supposing, you have a list of values in column A, and now you want to increment number by 1 in column B when the value in column A changes, which means the numbers in column B increment until the value in column A changes, then the number increment starts from 1 again as left screenshot shown. In Excel, you can solve this job with following method.

Increment numbers when value changes in each group with formula


arrow blue right bubble Increment numbers when value changes in each group with formula

To increment numbers based on another column when value changes, the following simple formula may help you.

1. Enter this formula: =IF(A2<>A1,1,B1+1) into a blank cell which beside your data, B2, for instance, see screenshot:

doc increment value changes 2

2. Then drag the fill handle down to the cells that you want to fill sequence numbers and restart for every change in column A, see screenshot:

doc increment value changes 3

Note: Here is another formula =COUNTIF($A$2:A2,A2) also can help you to create a number sequence that restarts for every change in another column.

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Comments (15)
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This comment was minimized by the moderator on the site
Hi i have a scenerio like:-

Code Price Result
2 100 1
2 250 2
2 300 3
4 600 1
4 800 2
5 900 1
5 1000 2
5 1000 2
6 300 1

how would i get values that i want in result column
This comment was minimized by the moderator on the site
Hello,
I'm sorry, I didn't understand your question. Could you describe it in more detail?
Thank you!
This comment was minimized by the moderator on the site
Hi,
Not sure if this is he best place to ask this but would love your help on this formula. I deposit an amount say $300 in my bank and get interest say $1.5 per day on the given amount. Once the accumulated interest reaches $100 (in a certain no. of days) I reinvest it and deposit it back into the bank which then increases my interest to $2.5 per day and so on. I would like the increasing interest, no. of days taken for each cycle amount accumulated and total amount invested in a table. The part I'm facing difficulty is in the part where the interest increases in each row and also want to constrain it to reinvest it if above $100 only, and also the amount of days it took for me to go above $100 each time.
This comment was minimized by the moderator on the site
Io devo fare questo:
In una casella ho un numero che va da 0 a 100 e vorrei che in un altra casella che ha valore iniziale 0 aumenti di una unità quando nella prima casella si passa da 0 a 5 e poi ogni 10. Quindi da 5 a 15 e l'sltra casella passa da 10 a 11, da 15 a 20 e l'altra casella passa da 11 a 12 così via.
This comment was minimized by the moderator on the site
I have number in a column. I want to count how many times that there is a break in the numbering sequence. So if you have 2,3,4, 10, 13,14,15. You would get a count of 3 times there was a break between the sequence in the numbers. I have spent two days trying all different kinds of formulas. Please help.
This comment was minimized by the moderator on the site
How to make this arrayformula? 
This comment was minimized by the moderator on the site
Hey! I have to imput steps from 1 to 15 and then the time used for that step is displayed in another collumn but then I want this time to stay the same when I change te step number. How do i make a collumn stay the same so I can imput other data?
Thanks!
This comment was minimized by the moderator on the site
If i have a list like this
BananaBananaBananaOrangeOrangeCherryCherryBananaOrange
How do i make it keep increment the sequence number in function of the name, i want it to recognized that he already seen this word/Number before in the column. do i have to always put a sorting filter to make it work?
thanks,
Evelyne
This comment was minimized by the moderator on the site
If you use the other suggested formula, =COUNTIF($A$2:A2,A2), Excel keeps counting no matter the order the words are in.
This comment was minimized by the moderator on the site
Hello Is there a way to calculate orange as total 6 and not show the increment order like 1,2,3,4,5 but at the end of row as 6 before entering into next new name
This comment was minimized by the moderator on the site
i need to increment number using the duplicate criteria, means if the criteria changes the Main Serial Number and Sub Serial Number should change, for example
1.1 604
1.2 604
2.1 605
2.2 605
2.3 605
3.1 606
3.2 606
4.1 607
4.2 607

hope you got my point. kindly help
This comment was minimized by the moderator on the site
is there a way to do this but I want to separate the different numbers, for example like
A1 1
A2 1
A3 2
A4 3
A5 3

I would like to automatically calulate the maximum number 1 in a row, maximum number 2 etc
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