Fuel Tank Capacity Calculator

Fuel Tank Capacity Calculator

Calculate volume, usable capacity, and fuel weight for any tank shape

Quick Presets
Results
Total Capacity
--
gallons
Usable Volume
--
at 95% fill
Full Tank Weight
--
lbs
Half-Full Volume
--
gallons
Calculation Breakdown
Tank Shape--
Dimensions--
Volume Formula--
Total Capacity--
Fill Percentage--
Usable Volume--
Fuel Type--
Full Tank Weight--
Half-Full Volume--
Quarter-Full Volume--
Quick Reference Stats
231
cu in per US Gallon
7.0
lbs per Gallon (Diesel)
6.3
lbs per Gallon (Gas)
7.48
Gallons per Cubic Foot
Common Farm Tank Sizes
Size Shape Typical Dimensions Capacity Common Use
SmallVert. Cylinder22" dia x 28" tall~55 galGasoline, small equipment
MediumVert. Cylinder30" dia x 54" tall~250 galFarm diesel, seasonal use
IBC ToteRectangle45" x 45" x 46"~275 galWater, liquid fertilizer
StandardHoriz. Cylinder48" dia x 72" long~500 galFarm diesel, main storage
LargeHoriz. Cylinder64" dia x 96" long~1000 galHigh-volume farm diesel
IrrigationVert. Cylinder36" dia x 48" tall~300 galWater storage
UndergroundRectangle38" x 44" x 62"~500 galDiesel, buried storage
Propane Ref.Sphere24" radius~263 galPropane reference only
Fuel Weight Reference
Fuel Type lbs / Gallon kg / Liter Weight per 100 gal Notes
Diesel7.00.839700 lbsMost common farm fuel
Gasoline6.30.755630 lbsLighter than diesel
Propane (liquid)4.240.508424 lbsLightest liquid fuel
Water8.341.000834 lbsHeaviest per volume
Used Oil7.50.899750 lbsSlightly heavier than diesel
Volume Conversion Reference
Unit Gallons Liters Cubic Feet Cubic Inches
1 US Gallon13.7850.1337231
1 Liter0.264210.0353161.02
1 Cubic Foot7.48128.31711,728
1 Cubic Inch0.004330.016390.0005791
100 Gallons100378.513.3723,100
500 Gallons5001,892.766.84115,500
Tips for Farm Fuel Tanks
Thermal Expansion & Headspace: Never fill a fuel tank 100% full — always leave 5–10% headspace for thermal expansion. Diesel and gasoline expand significantly in warm weather, and overfilling can cause spills or tank damage.
Horizontal Cylinder Working Capacity: For horizontal cylindrical tanks, actual usable volume varies with tilt and fill level. Use the 95% rule as a practical working capacity for most farm fuel tanks.

 

Count the fuel tank capacity is more difficult than one could believe. The tank of a typical car stores around 50 to 60 liters, what is about 12 to 16 gallons, according to the kind of vehicle. Most sedans and similar cars stay in this middle range, what gives them good distance between fill-ups.

Even so, these numbers change quite a lot according to the model of the car that one uses.

Fuel Tank Sizes for Cars, Trucks, and Tractors

Small cars usually have smaller tanks, between 10 and 12 gallons. On the other hand, big SUVs and pickups fit to store much more, from 20 gallons to even more than 36. Large SUVs, like the Suburban, usually pass the 30 gallons.

On the otehr hand, heavy trucks for long-range ways work in an entirely other world. They fill between 400 and 1,200 liters. Most of these rigs use double tanks, so the total capacity reaches from 800 to 2,400 liters.

The tanks of trucks do not follow any general rule. One could receive a single 75-gallon tank, double each 150 gallons or something between. Also the materials matter, steel or aluminum (and they come in different shapes), round ore square.

Everything depends on what was planned when the truck left from the factory line.

Here something useful to know: the stated capacity? It does not describe everything. A tank listed at 275 gallons indeed delivers only around 250 to 256 gallons, that one truly uses.

The listed number comes from averaging of various volumes of the tank, and it maybe covers only the usable fuel or both usable and the trapped part. Always stays a bit of fuel in the bottom, where the pump does not reach it.

The size of the engine and the size of the tank are two different things, what confuses many folks. When one sees “2.2L”, that relates to the engine volume, how much air passes through it during one full turn. The fuel tank capacity of your car could store 40 to 45 liters, no matter what.

When the gauge on your dash reads empty, fuel even so yet stays there. Most small cars and basic versions leave around 1 to 2 gallons unused. In some vehicles, 2 to 3 gallons stay in reserve, because one can not leave the tank entirely empty, that could harm hybrid systems.

It is possible to expand the capacity of your tank by means of refills and aftermarket options. There exist 58-gallon backup systems, that are allowed in all 50 states for gas cars. Ford Transit vans can receive 45-gallon expanded replacement.

Another way is exchange to a 52-gallon tank, where the original factory capacity was only 30.5 gallons.

Closed operations need an entirely other approach to the storage of fuel. Middle farms usually need 500 to 1,000 gallons on hand. Big farm gear, like combines and tractors, carry tanks between 150 and 300 gallons, while smaller tractors store 50 to 75 gallons.

Choosing the right size matters, too small means constant refueling, toobig leaves fuel simply unused.

Fuel Tank Capacity Calculator

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