Spike's Calculators

Barrel - Millimetres


Calculate the volume, capacity, and surface area of a barrel. This calculator uses millimetress for measurements.

The barrel's volume is calculated from inside measurements, and you must deduct the rims from your height measurement. The same applies to the surface area. Calculating the amount of wood in contact with the liquid inside the barrel, you must subtract the rim(s) from the height measurement.

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

Barrel - Millimetres

Tank Diameter mm
Mid Diameter mm
Barrel Height mm
Decimal Precision #
Liquid Weight-Kilograms per Litre kg/litre


Barrel Volume
In Cubic Millimetres mm³
In Cubic Metres
In Cubic Inches in³
In Cubic Feet ft³
Barrel Capacity
In Millilitres ml
In Litres L
In US Gallons gal US
In Imperial Gallons gal Imperial
Liquid Weight and Surface Area
Weight of Liquid kg
Surface Area in Square Millimetres mm²
In Square Metres
In Square Inches in²
In Square Feet


  1. the barrels' top diameter in millimetres
  2. the mid diameter in millimetres
  3. the height of the barrel (without the rims) in millimetres
  4. the weight of the liquid in kilograms per litre


  1. the volume of the barrel in cubic millimetres
  2. the volume in cubic metres
  3. the volume in cubic inches
  4. the volume in cubic feet
  5. the capacity of the barrel in millilitres
  6. the capacity in litres
  7. the capacity in US gallons
  8. the capacity in Imperial gallons
  9. full tank liquid weight based on kilograms/L
  10. the surface area of the barrel in square millimetres
  11. surface area in square metres
  12. surface area in square inches
  13. surface area in square feet

V= ΠH/15(3T²+8M²+4TM)
where V is the volume of the cone
Π = 3.14159265
T the  top diameter divided by 2
M the mid diameter divided by 2
H the height of the barrel
one cubic millimetre (mm³) = 0.000000001 cubic metres (m³)
one cubic millimetre (mm³) = 0.0000000353146667214886 cubic feet (ft³)
one cubic millimetre (mm³) = 0.0000610237440947323 cubic inches (in³)
one cubic millimetre (mm³) = 0.001 millilitres (ml)
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
one square millimetre (mm²) = 0.000001 square metres (m²)
one square millimetre (mm²) = 0.0015500031000062 square inches (in²)
one square millimetre (mm²) = 0.0000107639104167097 square feet (ft²)

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