More Natutical Miles per USD. To calculate the energy of an oil requires 4 parametres: Sulphur, Water, Ash and Density. Try the Simple Fuel Calculator and test what will be the best buy.
p = is density at 15°C, in kilograms per cubic metre, ex. 991.0.
x = is the water content, expressed as percentage by volume.
y = is the ash content, expressed as percentage by mass.
s = is the sulphur content, expressed as percentage by mass.
Typicals for IFO, 41 MJ/kgs good, 39MJ/kgs bad.
To separate number use . (full stop) not , (comma)