Find the right tank calculator
Choose a calculator tuned to your tank shape, measurement system, region, or preferred result unit.
By tank and application
Purpose-built tools for common vessels, regions, and workflows.
Aquarium Tank Size
Calculate aquarium volume in litres and gallons from internal tank dimensions, with fill-level and water-weight estimates.
Reef Tank Volume
Estimate reef aquarium and sump water volume in US gallons or litres using tank dimensions, fill level, and saltwater density.
Australia Tank Volume
Australian tank volume calculator for litres, kilolitres, cubic metres, and common imperial conversions.
India Tank Capacity
Calculate Indian water-tank capacity in litres from feet, metres, centimetres, or inches.
Cylinder Tank Volume
Calculate vertical or horizontal cylindrical tank capacity from diameter and height or length.
Cone Bottom Tank
Calculate total and filled volume for a cylindrical tank with a full cone bottom in litres, gallons, or cubic metres.
Volume with Density
Calculate tank volume and liquid mass using adjustable density in kilograms per litre.
Litres, gallons, and metric volume
Calculate or convert tank capacity using the output unit you need.
CM to Litres
Convert tank dimensions in centimetres to litres for rectangular, cylindrical, and cone-bottom tanks.
Tank Size in Litres
Calculate tank size in litres using centimetres, metres, millimetres, inches, or feet.
Volume in Litres
Calculate rectangular, cylindrical, horizontal, or cone-bottom tank volume in litres.
Capacity in Litres
Estimate full and working tank capacity in litres with adjustable fill percentage.
Tank Size in Gallons
Find tank size in US gallons from rectangular or cylindrical dimensions, with Imperial gallon comparison.
Volume in Gallons
Calculate tank volume in US gallons with instant Imperial gallon, litre, and cubic-foot conversions.
Volume in Cubic Metres
Calculate tank volume in cubic metres (m³) for rectangular, cylindrical, horizontal, and cone-bottom tanks.
Feet, inches, and barrels
US customary dimensions and oil-barrel capacity calculators.
Volume from Feet
Calculate tank volume from dimensions in feet, with cubic feet, gallons, litres, barrels, and cubic metres.
Volume from Inches
Calculate tank volume from inch dimensions in cubic inches, US gallons, litres, and more.
Tank Volume in BBL
Convert rectangular, cylindrical, horizontal, or cone-bottom tank dimensions to US oil barrels (bbl).
Volume in Barrels
Calculate tank capacity in barrels from diameter, height, length, or rectangular dimensions.
Volume in Oil Barrels
Estimate tank capacity in 42-gallon US oil barrels from metric or imperial dimensions.