Spike's Calculators

Cylinder with a Truncated Funnel Tank - Feet

Cylinder with a Truncated Funnel Tank

Calculate the volume, capacity, and surface area of a cylinder tank with a truncated funnel on the bottom. This tank's upper part consists of a cylinder with a truncated funnel attached to the bottom.
The calculator uses feet for measurements.

Approximate weight of Fuel or Water
one US gallon of water = 8.34 pounds.
one US gallon of diesel fuel = 7.1 pounds
one US gallon of gas = 6 pounds 

Cylinder with Cone Bottom Tank

Tank Diameter A ft in
Height A ft in
Height B ft in
Tank Diameter B ft in
Liquid Weight-Pounds per US Gallon lb/gal US


Tank Volume:
In Cubic Feet ft³
In Cubic Inches in³
In Cubic Metres
Tank Capacity:
In US Gallons gal US
In Imperial Gallons gal Imperial
In Litres L
Liquid Weight and Surface Area
Weight of Liquid lbs
Surface Area in Square Inches in²
In Square Feet ft²
In Square Millimetres mm²
In Square Metres


  1. enter the top diameter (A) in feet
  2. the cylinder part height (A) in feet
  3. the truncated funnel height (B) in feet
  4. the bottom diameter (B) in feet
  5. the weight of the liquid in pounds per US gallon


  1. he volume of the bowl tank in cubic feet
  2. the volume in cubic inches
  3. the volume in cubic metres
  4. the tank capacity in US gallons
  5. the capacity in Imperial gallons
  6. the capacity in litres
  7. full tank liquid weight based on lbs/gal US
  8. the surface area of the tank in square inches
  9. the surface area in square feet
  10. the surface area in square millimetres
  11. the surface area in square metres

cV = 𝝅(D/2)*H
fV = 1/3𝝅H((T/2)²(B/2)²)
where cV is the volume of the cylinder
fV the volume of the truncated funnel
fV the volume of the funnel
D = diameter T
H is the height
T and B, the upper and lower diameters of the funnel
one cubic foot (ft³) = 1728 cubic inches (in³)
one cubic foot (ft³) = 28316846.592 cubic millimetres (mm³)
one cubic foot (ft³) = 0.028316846592 cubic metres (m³)
one cubic foot (ft³) = 7.48051948051947 gallons (gal) US
one cubic foot (ft³) = 6.22883545904283 gallons (gal) Imperial
one square foot (ft²) = 144 square inches (in²)
one square foot (ft²) = 92903.04 square millimetres (mm²)
one square foot (ft²) = 0.09290304 square metres (m²)

Vertical Cylinder Tank with a Truncated Funnel (Hopper)

Vertical Cylindrical Tank

Partial Filled

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