Spike's Calculators

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

Barrels usually have rims (chimes) on the top and bottom.

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.

one US gallon of water = 8.34 pounds. one US gallon of diesel fuel = 7.1 pounds one US gallon of gas = 6 pounds

- the barrels' top diameter
- the mid diameter
- the height of the barrel (without the rims)
- the weight of the liquid in pounds per US gallon

- the volume of the barrel in cubic inches
- the volume in cubic feet
- the volume in cubic metres
- the barrels' capacity in US gallons
- the capacity in Imperial gallons
- the capacity in litres
- tank liquid weight based on lbs/gal US
- the surface area of the barrel in square inches
- the surface area in square feet
- the surface area in square millimetres
- the surface area in square metres

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 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)