# gallons of fuel oil vs depth in tank

Hello, My fuel oil tank is a cylinder 4 feet round by 6 feet. It holds 550 gallons. I would like to be able to measure the depth of the oil in the tank and convert that number to gallons. There are only three depths I am sure of 1) at zero depth there is zero gallons of oil, 2) at 2 feet there are 275 gallons, and 3) at 4 feet depth there are 550 gallons of oil. Today, for example, the oil was 16 inches deep - how many gallons is that? I googled all over the internet and can't seem to find the formula. I would me very grateful for any help. Thank you.
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On Mon, 10 Dec 2007 15:12:47 -0500, Desiglass wrote:

So at 48 inches you have 550 gallons. 4x12 = 48. That works out to 11.5 gallon per inch. 550/48. 16 inches x 11.5 gallons per inch = 185 gallon.
Sound reasonable?
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Meat Plow wrote:

The diameter must be just under five feet.
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Meat Plow wrote:

No. It would for a straight sided tank, even a cylinder if it was vertically oriented, however, these tanks are all horizontal, so the gallons/inch varies.
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wrote:

From the numbers given in 1, 2 and 3, the number of gallons and depth is linear. That's sounds like vertical sides.
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Phisherman wrote:

It is linear if only those 3 points were ever considered. All other possible sample points could never be linear because the poster said he had a cylindrical tank.
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The OP said is a 4 foot round cylinder, by 6 feet, and that it holds 550 gallons. He then says when the level measures 4 feet it has 550 gallons.
Obviously the 4 foot measure is vertical, and the depth is clearly *not* linear. With only measurements at full, empty and half, the values given are correct for a 4 foot cylindrical tank that is horizontal, not vertical.
--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson
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On Dec 10, 5:24 pm, snipped-for-privacy@apaflo.com (Floyd L. Davidson) wrote:

He 'says' it is cylindrical but...
I have never seen one like that, They are all horizontal, 1/2 round on the bottom, vertical sides then 1/2 round on the top. That type would vary gallonage by depth except for the middle portion.
Harry K
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You're thinking of the 275 gallon type. He has a 550 and those are indeed cylindrical and usually burined on their side. I've seen and used a chart that showed gallons vs inchs. There must be one online somewhere. Or an oil supply company would have one.
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On Dec 11, 8:50 am, snipped-for-privacy@optonline.net wrote:

My tank is as I have described. My mother's the same (she had two). In my case I just took delivery of 252 gal of oil. The gauge showed that the tank was about 1/2 empty when I ordered. Thus, my tank must be around 500 gal.
Harry K
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And I have no reason to doubt him.

I've been pumping fuel out of tanks for decades, and do no recall *ever* seeing a tank like you describe.

Which makes no difference at all, because what he described was *very* clearly a horizontal cylindrical tank, 4 feet high (round) and 6 feet long. It's a fairly standard tank.
--
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson
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On Dec 11, 11:56 am, snipped-for-privacy@apaflo.com (Floyd L. Davidson) wrote:

He's talking about the 275 gallon type that are commonly used inside basements or standing outside next to the house.

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snipped-for-privacy@optonline.net wrote:

Exactly. (Those are commonly used for "day tanks".)
They don't make 500+ gallon tanks, which is what this discusssion is about, with that construction.
Floyd L. Davidson <http://www.apaflo.com/floyd_davidson Ukpeagvik (Barrow, Alaska) snipped-for-privacy@apaflo.com
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Fuel Oil Tank Measurement Gauging Chart Residential
275H H = Horizontal or Tank Laying on Side    275V V = Vertical or Tank Standing Up on legs    330H 330V 500 Cylindrical     550 Cylindrical     1000 Cylindrical
Width and Height or Diameter    27X44"    44X27"    44X27"    27X44"    48"    48"    48" Tank Length    60"    60"    72"    72"    65"    72"    130"
Stick Measurement    Gallons 1"    6    2    8    2    2    3    5 2"    14    5    17    6    7    8    14 3"    23    9    28    11    13    14    26 4"    32    14    38    16    20    22    40 5"    42    19    50    23    28    30    55 6"    52    25    64    30    36    40    72 7"    63    31    76    37    46    50    90 8"    74    38    90    44    55    60    110 9"    85    44    103    52    66    71    130 10"    96    51    116    60    76    83    150 11"    108    58    131    68    88    95    173 12"    120    65    144    77    99    107    196 13"    132    72    158    85    111    120    219 14"    144    79    172    94    123    133    243 15"    156    86    186    102    135    146    267 16"    168    94    199    110    148    160    292 17"    179    101    214    119    161    174    317 18"    190    108    227    127    174    188    342 19"    201    115    240    136    187    202    368 20"    212    122    254    144    200    216    394 21"    223    129    266    152    214    230    420 22"    233    136    280    161    227    245    446 23"    243    143    292    169    241    260    473 24"    252    151    302    178    254    275    500 25"    261    158    313    186    268    290    527 26"    269    165    322    195    281    305    554 27"    275    172    330    203    295    320    580 28"         179         211    308    334    606 29"         186         220    321    348    632 30"         193         228    334    362    658 31"         200         237    347    376    683 32"         207         245    360    390    708 33"         214         253    373    404    733 34"         221         262    385    417    757 35"         228         270    397    430    781 36"         235         277    408    443    804 37"         242         285    421    455    827 38"         248         292    432    467    850 39"         254         299    443    479    870 40"         259         305    453    490    890 41"         264         311    463    500    910 42"         268         316    472    510    928 43"         272         320    481    520    945 44"         275         322    488    528    960 45"                        495    536    974 46"                        501    544    986 47"                        506    547    995 48"                        509    550    1000
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Meat Plow wrote:

resonably acccurate if the six foot dimension is vertical and the ends are fairly 'flat'. If tank is horizontal, gallons per inch varies from zero at the bottom to a max in the middle and then back to zero at the top of the tank. But I'm sure you knew that, MP, and gave the OP a good answer to his [incomplete?] statement of the problem. Of course if all heating oil tanks are vertical with flat ends, your answer was Right On.
the six foot dimension is horizontal.
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Your Oil Distributor should be able to fix you up with a trip to their office "get a chart or a copy of one"..also remember the measure will only be correct if the tank lys level..but will be close.
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Meat Plow wrote:

It wouldn't be a linear relationship since the tank is cylindrical.
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You're a 12 year old girl?
--

Christopher A. Young;
.
.

"Meat Plow" < snipped-for-privacy@petitmorte.net> wrote in message
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Desiglass wrote:

Go here: http://www.cairocoop.com/zz/tankcalc.htm
Enter tank dimensions in inches. Either TAB to the next entry or mouse Left click on the "Measured Gallons" to make it calculate the new value.
Jim
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Desiglass wrote:

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