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# Excel/Gallons/hr calculations

Question
Hi Tom,

I seem to be having an issue with my Fuel Consumption Spreadsheet and was wondering if I could get some help.

Here's what I have so far:

Gallons/hr @cycle time= 57.9
Time @cycle: 8:59:14

I've been trying to see if I can get it to read off the allotted time but no matter what I do it either comes back extremely low or pretty high (21.26 or 736) As far as I know it should be around 520 gal/hr

Any help would be greatly appreciated, Thanks

if you have  8:59:14 in a cell, then format that cell as general.  It would then appear as

0.374467592592593  when I multiply that times  57.9 I get  21.6816736111111

which appears to be the extremely low you talk about.  The problem with the 8:59:14 is that is is treated as hours:minutes:seconds and stored as a time serial number.  The time serial number is the proportion of a 24 hour day represented by 8 hours, 59 minutes and 14 seconds.

The way to convert that to hours rather than days is to multiply by 24.

(0.374467592592593 x 24) = 8.98722222222222 or approximately 8.987 hours

= (0.374467592592593 x 24) x 57.9 which equals 520.360166666667

as a quick check, 9 x 58 = 522 so this appears to be the correct answer.

in excel:
A1:  57.9
A2:  8:59:14
A3:  =(A2*24)*A1   will return 520.360166666667
(The 520.360166666667  may appear rounded say to 520.36. )

Hope that clears it up for you.

--
Regards,
Tom Ogilvy

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#### Tom Ogilvy

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