SUM function is wrong on 17 decimal ? (both in excel and in power BI)

[Rygaard]

Is there a fix besides making a filter that filters out obviously wrong numbers ?

OK  - so i have an Avarage price :-241.431.642.836.356.400,00   (241 quadrillion)   but my Tonnage is 0 and my amount is -13724

But really my amount and my avarage and my tonnage should be zero, since its invoices beeing cancled out.

First i "blamed" a collegue for typing manualy, since there was an error, but ther is no error, after exporting to the table to excel i get this strange result  (this is the tonnage)

and its not the first time I have seen strange Sum() errors in excel and Power BI - is ther any fix, other than have your filter filter out this ?

you can try this yourself by typing theese numers in excel:

1.224,58 kr.

-1.224,58 kr.

102,08 kr.

-1.312,26 kr.

102,05 kr.

-2.953,90 kr.

4.086,65 kr.

Then taking a sum and you will get : 

                                                                24,6199999999999    

  (should be 24,62 kr  no decimals)

and if you add the numbers manualy in this order : (=A1+A2+A3+A4+A5+A6+A7)  you get 

                    24,6200000000003    

But if you add the numeers manualy in this order : (=A7+A1+A2+A3+A4+A5+A6) you get 

                    24,6199999999999    

[v-eachen-msft]

Hi @Rygaard ,

I can't reproduce this problem. You could provide your sample pbix file to us if you don't have any confidential information? Please upload your files to OneDrive and share the link here.

[ChrisMendoza]

@Rygaard -

This recently came up in the Excel Community. I had never experienced it so I am not an expert by any means. Take a look at https://www.microsoft.com/en-us/microsoft-365/blog/2008/04/10/understanding-floating-point-precision... and https://community.powerbi.com/t5/Desktop/Decimal-Values-Precision/td-p/375433. Hopefully it helps.

[Tad17]

Have you made sure your decimal vs comma usage are in agreement?

It looks like you have a mixed of European and American numbers in there.