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Frequent Visitor

Format decimal numbers

I am trying to format the data of a calculated field within the flow to send in an email to show 2 decimal places. has anyone acheived this? 


I have tried both Text and Round and several iterations of these functions and they come back as invalid templates. 


Can anyone shine any light on this? 




the value from the column is 1.50000000000 i only want to see 1.5


Accepted Solutions
Community Champion
Community Champion

As far as I know, math functions currently supported in Microsoft FLow as "expressions" are the ones defined here:


I guess you can multiply by 100, convert into integer, get back to float and divide into 100; but I haven't tested myself; so unsure if both float() and int() accepts non-string parameters


Hope this helps


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View solution in original post

Community Champion
Community Champion

As far as I know, math functions currently supported in Microsoft FLow as "expressions" are the ones defined here:


I guess you can multiply by 100, convert into integer, get back to float and divide into 100; but I haven't tested myself; so unsure if both float() and int() accepts non-string parameters


Hope this helps


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@efialttes thank you so much for your repsponse and the link you provided. With a little reading and some trial and error i have come up with the following:


if(or(greater(body('Create_item')?['Days_x0020_Total'], string (10)),equals(body('Create_item')?['Days_x0020_Total'],string(10))),take(body('Create_item')?['Days_x0020_Total'],4),take(body('Create_item')?['Days_x0020_Total'],3))


This basically looks at the value in the total days field and determines if it is greater or equal to 10, if yes then it will produce 4 place and if no it will produce 3 places.


works a treat

Community Champion
Community Champion


You are welcome. Thanks for sharing!

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There's still no generalized rounding solution in Flow, which means building solutions specific to your data. Here's an approach I took when I needed to round from three decimals (#.###) to two (#.##) for display purposes. Fortunately, I knew I'd always be getting data in a #.### format, but you could pretty easily extend this to find the decimal place if the number of places to the left of the decimal was unknown.


if(contains('56789', substring(string(triggerBody()['number']),4,1)),substring(string(add(triggerBody()['number'],0.01)),0,4),substring(string(triggerBody()['number']),0,4))

Not applicable

I just used your suggestion to round the result of my division formula:

Original expression:


Which returned the full result, i.e 1.6666666 or similar.


I formatted it to 1 decimal using this expression:



that is

  • take result from division
  • multiple by 10
  • converting to int
  • converting to float (else it became an integer result)
  • dividing by 10


Thanks for the hint!

It was not as simple, because int() and float() only accept string arguments. So you get a run-time error like this:


InvalidTemplate. Unable to process template language expressions in action 'Rounded' inputs at line '1' and column '2484': 'The template language function 'int' was invoked with a parameter that is not valid. The value cannot be converted to the target type.'.
On top of that, the  int() function only accepts string representations of integer numbers - it does not accept any floating point number. So I had to turn the number to string, select the part before the '.' and pass it to  int(). Not sure if the '.' is subject to localization, which would obviously fail. 
This is the expression I've put into a Compose action:
div(int(first(split(string(mul(123.456, 10.0)),'.'))), 10.0)
The output was 
New Member

Thanks to Damo_R I was able to round numbers for our case, with two numbers behind. A little bit ugly, but it works.


Initializing 2 variables.

variable var as string 

first(split(string(mul(123.454, 1000.0)),'.'))

(you can put your number or varible where 123.454 is)

variable varTemp as Integer


than we go on with a condition



equal or even to 5


set var to



set var to 


finally transform it to a float (int would slice the numer)



Frequent Visitor

Glad my efforts could help you

Here's a similar solution, but no temp variables are needed.

Uses variables('myFloat') to represent the number you want to round.

mul(variables('myFloat'), 1000),
mod(mul(variables('myFloat'), 1000), 10),
mod(mul(variables('myFloat'), 1000), 10)

Or, all in one line: 


The float is multilpiled by 1000 before doing modulo to avoid tiny-fraction math errors (e.g. returning 0.00499999... instead of 0.005).


Using add, sub, mul, div, and mod to round a float... a reasonable workaround... XD


If you're looking for an expression to format for currency with a thousands separator, see my expression in another post.

Frequent Visitor

This can be done with the following



Don't forget the decimal '.' counts as a character because this is a string not an actual intager.  It is not actual rounding, but it accomplished what I needed for my email to look cleaner. 

Not applicable

@StevenWade , thanks so much for sharing this. I want to limit my decimals to two points, can you please help me with what modification should I make in the expression you shared please, thanks in advance. 

Not applicable

@jan-dolejsi thanks for sharing. I have a requirement to limit decimal points to two, so as an example: 40.325 should result into 40.33. Can you please help me with the revised formula, thanks in advance. 

Not applicable

@degvalentine thanks for sharing, I used your expression for limiting decimals to two places and it seems to work well. Noticing a small issue, if the values are 2.2, 4.3 etc then the expression returns 2.2, 4.3 only but instead i want it to show 2.20, 4.30, is it possible? Please help.

Hi @Anonymous,


Actually, my hideous workaround is no longer needed. They added the "formatNumber" function. Please use that instead. Here's the syntax for common currency formatting (without currency symbol):


formatNumber(variables('myFloat), 'N', 'en-US')


Not applicable

Thanks a lot for. My field is of type number. Can u give some info on the parameter ‘N’ specified in the expression, would it help limiting decimals to two points? Thanks.

Here's the doc for all available number formatting options:

Not applicable

Thanks @degvalentine a lot for sharing this, I was stuck with this issue since 3 days and this helped me out, keep up the good work, cheers!! 

p.s: it works great and gives me two decimal points. 

Hi @jan-dolejsi ,


How do I get 2 decimals instead of just one? 


Thank you!

@rafaelbenicio you should use the "formatNumber()" expression or the "Format Number" action.


Here are links to the standard formats and custom formats.


formatNumber(1.995,'N2') // returns "2.00"


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