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## Calculating days between dates and ignore if blank

I have two dates in a table, Registering Day and Day out.

There will always be a registering date, but not always a day out. I need to work out the average daby between but this is casuing errors beciase one of the days will be blank. I have started with something like this but can anyone guide me on how to correct it. Thanks

Workingdays = CALCULATE(SUM('DateKey'[IsWorkingDay]), DATESBETWEEN(DateKey[Date],'Put Away Headers'[Registering_Date],'Put Away Headers'[Day_Out])) -- Here i need to filter out blank "Day Out"

2 ACCEPTED SOLUTIONS

Accepted Solutions
Super Contributor

## Re: Calculating days between dates and ignore if blank

Hi @LewisH,

If I understand you correctly, the formula below should work in your scenario.

```Workingdays =
IF (
ISBLANK ( 'Put Away Headers'[Day_Out] ),
BLANK (),
CALCULATE (
SUM ( 'DateKey'[IsWorkingDay] ),
DATESBETWEEN (
DateKey[Date],
)
)
)
```

Regards

Super User

## Re: Calculating days between dates and ignore if blank

Hi,

Does this work?

2 REPLIES 2
Super Contributor

## Re: Calculating days between dates and ignore if blank

Hi @LewisH,

If I understand you correctly, the formula below should work in your scenario.

```Workingdays =
IF (
ISBLANK ( 'Put Away Headers'[Day_Out] ),
BLANK (),
CALCULATE (
SUM ( 'DateKey'[IsWorkingDay] ),
DATESBETWEEN (
DateKey[Date],
)
)
)
```

Regards

Super User

## Re: Calculating days between dates and ignore if blank

Hi,

Does this work?

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