Oil Tank RouteResidential field tools

275-gallon field guide

275-gallon oil tank dimensions, gauge chart, and fill planning

The common 275-gallon label covers multiple tank bodies. Compare verified models first, then use the chart that matches the tank and orientation.

Compare verified data

Field notes

Do not treat 275 as one shape

  1. 01

    A Granby vertical 275-gallon obround model is published at 60 x 27 x 44 inches.

  2. 02

    Roth publishes both a tall 275-gallon 1000L model and a low-height 1000LH model.

  3. 03

    The verified Granby vertical capacity chart is accurate to about +/-2% and is not for buying or selling fuel.

Manufacturer-verified models

275-gallon does not mean one footprint

Dimensions are listed as length x width x height. Verify the physical label before using a model-specific chart.

ModelShape / orientationNominalDimensionsChart max / nominal*Verified
Granby204201P Standard 20Plusobround / vertical275 gal60 x 27 x 44 in273.8 gal2026-08-01
Granby204701P Standard 20Plusobround / horizontal275 gal60 x 44 x 27 in275.0 gal2026-08-01
RothDWT 1000Lrectangular / vertical275 gal43 x 28 x 61 in275.0 gal2026-08-01
RothDWT 1000LH low heightrectangular / vertical275 gal51 x 30 x 54 in275.0 gal2026-08-01

*Chart maximum is the final value on a reviewed gauge chart when available; otherwise the manufacturer nominal capacity is shown. It is not a delivery instruction.

Manufacturer capacity table

275-gallon vertical oil tank chart: inches to gallons

This chart belongs only to the labeled vertical model shown below. A horizontal 275-gallon tank has different geometry and must not use this table.

Granby 204201P Standard 20Plus 60 x 27 x 44 in / vertical Official chart verified 2026-08-01
Granby 204201P Standard 20Plus 275-gallon vertical oil tank chart
Liquid depthGallons
0 in0.0 gal
1 in1.8 gal
2 in5.0 gal
3 in9.0 gal
4 in13.7 gal
5 in19.0 gal
6 in25.1 gal
7 in31.3 gal
8 in37.7 gal
9 in44.3 gal
10 in51.2 gal
11 in58.2 gal
12 in65.3 gal
13 in72.4 gal
14 in79.6 gal
15 in86.7 gal
16 in93.9 gal
17 in101.1 gal
18 in108.2 gal
19 in115.4 gal
20 in122.6 gal
21 in129.7 gal
22 in136.9 gal
23 in144.1 gal
24 in151.2 gal
25 in158.4 gal
26 in165.6 gal
27 in172.7 gal
28 in179.9 gal
29 in187.1 gal
30 in194.3 gal
31 in201.4 gal
32 in208.6 gal
33 in215.6 gal
34 in222.6 gal
35 in229.5 gal
36 in236.1 gal
37 in242.6 gal
38 in248.7 gal
39 in254.4 gal
40 in259.8 gal
41 in264.6 gal
42 in268.7 gal
43 in272.0 gal
44 in273.8 gal

Manufacturer-stated chart precision is approximately +/-2%. Tank tilt, reading method, and installation add uncertainty. This table is planning information, not a delivery-meter reading.

Calculate between chart rowsUses interval interpolation instead of linear tank-capacity multiplication.

Route-specific question

One distinction that matters

Does a quarter-tank gauge reading mean exactly 68.75 gallons?

No. An obround tank is not rectangular, so gallons do not rise in a straight line with liquid height. Use the matching capacity chart.

How many gallons are at 1/4, 1/2, and 3/4 on a 275-gallon vertical tank?

For the verified Granby 204201P vertical model, 11 inches (one-quarter of the 44-inch chart height) is 58.2 gallons, 22 inches is 136.9 gallons, and 33 inches is 215.6 gallons. These values do not apply to a horizontal tank or a different model.

Which 275-gallon oil tank chart is published on this page?

The inches-to-gallons table is the manufacturer-published Granby 204201P Standard 20Plus vertical chart, verified on August 1, 2026. Match the label and vertical orientation before using it.

Source boundary

Official source material

Model values require manufacturer support; safety and removal guidance uses official public-agency material. Verification date: 2026-08-02.

  1. Granby Standard 20Plus residential oil tanks

    Manufacturer model dimensions and orientation; verified 2026-08-01.

  2. Granby U.S. vertical tank capacity chart

    Manufacturer gallons-by-inch table, stated precision +/-2%; verified 2026-08-01.

  3. Roth double-wall heating-oil tanks

    Manufacturer nominal capacities and body dimensions; verified 2026-08-01.

Continue the route

Use the next tool only when the job changes.

04 / ChartsOpen official tank chartsUse manufacturer inches-to-gallons rows only after the model and orientation match.05 / GaugeCalculate a gauge readingTurn a fraction or stick depth into chart-based gallons.02 / CompareCompare sizesUse one verified model table shared by every tool.