Spike's Calculators

Spherical Dome Tank

Spherical Dome Tank

Calculate the volume, capacity, and surface area of a spherical dome tank. The spherical dome tank is a sphere cap and requires a height measurement and the base length of the tank. This calculator uses inches 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

Spherical Dome Tank

Height of Tank in
Base Lenght of Cap in
Liquid Weight-Pounds per US Gallon lb/gal US


Tank Volume
In Cubic Inches in³
In Cubic Feet ft³
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 height of the spherical dome tank
  2. the tank's base length
  3. the weight of the liquid in pounds per US gallon


  1. the volume of the spherical dome tank in cubic inches
  2. the volume in cubic feet
  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

R= ((C/2)²/H+H)/2
V= H²Π/3(3R-H)
where R is the radius of the sphere 
V  the volume of the tank
C the base length of the cap
H the height
𝝅 = 3.14159265
one cubic inch (in³) = 0.000578703703703704 cubic feet (ft³)
one cubic inch (in³) = 0.000016387064 cubic metres (m³)
one cubic inch (in³) = 0.00432900432900432 gallons (gal) US
one cubic inch (in³) = 0.00360465014990905 gallons (gal) Imperial
one cubic inch (in³) = 0.016387064 litres (L)

Spherical Dome Tank/Container (Sphere Cap)

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