Fluids & tank calculators
Volume conversions, tank sizing and fuel planning tools.
Tank volume calculator
Calculate volume for rectangular, cylindrical, L-shaped and trapezoidal tanks.
Fuel consumption
Calculate total fuel for a passage from consumption rate, speed and distance.
Fuel range calculator
Calculate maximum range and endurance from tank capacity, burn rate and speed.
Litres to gallons
Convert between litres, UK gallons and US gallons.
UK vs US gallons
A UK (imperial) gallon is 4.546 litres. A US gallon is only 3.785 litres — about 20% smaller. Always check which gallon is being used in fuel specifications or consumption figures from US-built engines.
1 UK gallon = 4.546 L | 1 US gallon = 3.785 L