Converting time to a number

grovelli
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Converting time to a number

Post by grovelli »

Is there a function available to convert time(hours and minutes) to a number?
I'll explain: for my calculations about electrical energy I need to find the mean power which is obtained dividing energy expressed as kWh by the time length that energy was produced. For example if energy equals 22500 kWh and time length equals 7 hours 53 minutes, in order to find the mean power I have to convert 7:53 to 7,88.

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HansV
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Re: Converting time to a number

Post by HansV »

A time is stored as a number of days, e.g. 12 hours = 0.5, and 6 hours = 0.25
To convert to a number of hours, multiply by 24, so for example if the time field is named Duration, you can use

[Duration]*24
Regards,
Hans

grovelli
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Re: Converting time to a number

Post by grovelli »

But...if [Duration]= 7:53(7 hours and 53 minutes), what do I get by multiplying 7:53*24?

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HansV
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Re: Converting time to a number

Post by HansV »

The easiest way to find out is to try it out yourself - it takes less than a minute!
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Hans

grovelli
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Re: Converting time to a number

Post by grovelli »

Thanks Hans!! :-)
I would have never imagined that would so easily work using a form. But, outside of a form, if, for example you need to do the calculation in a query or in code, is there a way to do it so easily? If I go in the VBA immediate window and type ?07:53*24 I get an error. In these circumstances do I need a function that takes 7:53, turns it into a string, separate the various components, and reassemble the results into a number(7,88 in this case)?

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HansV
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Re: Converting time to a number

Post by HansV »

In a query it would work exactly the same: [Duration]*24
In code it would work exactly the same: Duration * 24

If you want to test with a literal time, you must enclose it in # otherwise VBA won't recognize it as a time value.
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Hans

grovelli
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Re: Converting time to a number

Post by grovelli »

Forgot the hashes!!! :hairout: :bash:
And without even using a function!! You're a God!!! :king: :artist: :bravo:

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Charlotte
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Re: Converting time to a number

Post by Charlotte »

Hi Giorgio,

Glad you found Eileen's Lounge. Welcome.
Charlotte

grovelli
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Re: Converting time to a number

Post by grovelli »

Hi Charlotte!!! :clapping: :fanfare: :cheers: :music: :hello: (where's a smilie for a bunch of flowers when you need it?)
Yes, the Master :gent: reeled me in so the family reunion is ongoing :hugs: