Spike's Calculators

Truncated Funnel Tank - Millimetres

Truncated Funnel Tank

Calculate the volume and capacity of a truncated funnel tank. The funnel tank here has the shape of an upside down truncated cone with the bottom section cut off perpendicular to the top.
This calculator uses millimetres for measurements.

Approximate weight of Fuel or Water
one litre of water = 1 kilogram
one litre of diesel fuel = 0.832 kilogram
one litre of gas = 0.75 kilogram
Note: measurement used in the calculation is the  diameter length, not the radius length! 

Truncated Funnel Tank - Millimetres

Funnel Tank Top Diameter mm
Bottom Diameter mm
Height of the tank mm
Liquid Weight-Kilograms per Litre kg/L


Tank Volume:
In Cubic Millimetres mm³
In Cubic Metres
In Cubic Feet ft³
Tank Capacity:
In Litres L
In US Gallons gal US
In Imperial Gallons gal Imperial
Weight of Liquid kg


  1. enter the top diameter T of the tank in millimetres
  2. the bottom diameter B of the tank in millimetres
  3. the height of the funnel tank in millimetres
  4. the weight of the liquid in kilograms per litre


  1. the volume of the truncated funnel tank in cubic millimetres
  2. the tank volume in cubic metres
  3. the volume in cubic feet
  4. the tanks' capacity in litres
  5. the capacity in US gallons
  6. the capacity in Imperial gallons
  7. full tank liquid weight based on kilograms/litre
V = 1/3𝝅t²+tb+b²h
where V is the volume of the tank
𝝅 = 3.14159265
t half the tanks' top diameter
b half the the bottom diameter
h the height of the tank
one cubic millimetre (mm³) = 0.000000001 cubic metres (m³)
one cubic millimetre (mm³) = 0.0000000353146667214886 cubic feet (ft³)
one cubic millimetre (mm³) =  0.000001 litres (L)
one cubic millimetre (mm³) = 0.000000264172052358148 gallons (gal) US
one cubic millimetre (mm³) = 0.000000219969248299088 gallons (gal) Imperial

Funnel Tank/Container (Truncated)


Partial Filled

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