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Gallons in a tank??

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Alvin NE WI

10-20-2001 17:34:51




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I got a tank that is 80 inches across and 150 inches long. How many gallons does it hold. I can't find my book on how to to the figuring and it is so dang long time since I learned how to do that. Thanks much for any help..Alvin




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william l. brown

10-22-2001 13:08:29




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 Re: gallons in a tank?? in reply to Alvin NE WI, 10-20-2001 17:34:51  
i have read all of the post, and i have done my calculations. 326 gallons
is what i came up with.
piexr2xh/231 cu.in.= 326 gallons.

william



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william l. brown

10-23-2001 11:59:01




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 Re: Re: gallons in a tank?? in reply to william l. brown, 10-22-2001 13:08:29  
WOW, i have the decimal point in the
wrong place. it should read
3260. gallons.
william



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Jerry D in NC

10-20-2001 18:26:31




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 Re: gallons in a tank?? in reply to Alvin NE WI, 10-20-2001 17:34:51  
Using Length X Width X Height(which you forgot) gives cubic inches. There are .00433 gallons per cubic inch. Using this formula (80 X 150 X 1) X 0.00433 gives you about 52 gallons per inch in depth. Now I am sure I have missed something but this is a first stab



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Alvin NE WI

10-20-2001 19:30:17




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 Re: Re: gallons in a tank?? in reply to Jerry D in NC, 10-20-2001 18:26:31  
Jerry-- this tank is round, so if my menory serves me right I can only come up with the 2 dim. The dia. is 80 inches and the lenght is 150 inches . Sorry for not stating that the first time.



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Jerry D in NC

10-21-2001 05:56:20




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 Re: Re: Re: gallons in a tank?? in reply to Alvin NE WI, 10-20-2001 19:30:17  
Well then the formula would be

pi X rsq X L X .00433gal/ci

Which gives

3.14 X 40 X 40 X 180 X .00433

Which says the tank holds about 3900 gallons



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paul

10-21-2001 09:05:27




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 Re: Re: Re: Re: gallons in a tank?? in reply to Jerry D in NC, 10-21-2001 05:56:20  
Since this is the size of most "300 gallon" tanks (which vary in actual size from 280 to 350 gallons or there abouts) I think something got messed up to come up with almost 4000 gallons....

--->Paul



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paul

10-21-2001 09:07:48




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 Re: Re: Re: Re: Re: gallons in a tank?? in reply to paul, 10-21-2001 09:05:27  
Then again, let me convert to feet, and, um, never mind, I'm off today...

--->Paul



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Tim

10-21-2001 17:44:04




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 Re: Re: Re: Re: Re: Re: gallons in a tank?? in reply to paul, 10-21-2001 09:07:48  
There are 231 cubic inches in one gallon.
Round tank? Pi times Radius squared times height, (all measurements in inches) divided by 231 equals gallons. You have a tank that holds 3264 gallons. Big tank, 6 1/2 foot tall by 12 1/2 long.
Paul's guess with 300 gallons must be in error.
If you want to use feet, there are 7.48 gallons in one cubic foot.



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Bill from the north

10-21-2001 22:06:37




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 Re: Re: Re: Re: Re: Re: Re: gallons in a tank?? in reply to Tim, 10-21-2001 17:44:04  
How come it works out to a lot less when you use cu.ft.--3.25x3.25=10.5625x3.1416=33.18315x12.5=414.78937x7.48=3102.6244gal.? Well 162gal. difference



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Eric Horne

10-22-2001 09:41:46




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 Re: Re: Re: Re: Re: Re: Re: Re: gallons in a tank?? in reply to Bill from the north, 10-21-2001 22:06:37  
Bill,

Your differance comes from your radius conversion. 40 inches = 3.333 ft. Run with this and you will be on the money.

Hey Alvin,

If you are planning on using this as a portable water tank, 3000 gallons of water will weigh in at 25036 lbs. Better get the big tractor out.

Eric



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Mark K.

10-20-2001 22:00:01




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 Re: Re: Re: gallons in a tank?? in reply to Alvin NE WI, 10-20-2001 19:30:17  
Hello,
I think it is Pie * the radius (half diameter)square (times itself) times length. 3.1416*(40*40)*150
3.1416*160*150=75398.4 You can multiply this by the figure given in the previous post of gal. per square inch. .00433*75398.4= 326.5 gal.
You also could divide the cubic inches by the number of cubic inches in a cubic foot then multiply by approximatly 7.5
75398.4/(12*12*12)
75398.4/1728= 43.6333 cu.ft.
43.6333 cu.ft * 7.5= 327.25
I think gal. per cu.ft. is 7.4_ something.
Mark

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Eric Horne

10-21-2001 05:48:49




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 Re: Re: Re: Re: gallons in a tank?? in reply to Mark K., 10-20-2001 22:00:01  
Mark,

You have a little mistake in your calculation. Your formulas are OK, but 40*40=1600. You are off by a factor of ten. Correct the mistake and you come up with the same number as Mr. Hudson.

Eric



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Mark K.

10-21-2001 21:23:58




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 Re: Re: Re: Re: Re: gallons in a tank?? in reply to Eric Horne, 10-21-2001 05:48:49  
Eric,
You would think that I would learn never to do anything in my head, always get a calculator.
Mark
Sorry



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rhudson

10-20-2001 21:44:33




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 Re: Re: Re: gallons in a tank?? in reply to Alvin NE WI, 10-20-2001 19:30:17  
let me try this. (dia squared x pie / 4)x 150 = volume in cubic inches (753,982). 231 cubic inches in a gallon so 753,982 / 231 =3263.99 gallons. i think most fuel tanks have about a 10% air space for expansion of fuel so if thats right the tank would be about a 3000 gallon tank. its late, hope this is correct.



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