How many litres does my cylinder hold?

This would vary depending on size of cylinder.

If you have a propane cylinder (47kg / 19kg / 18kg / 11kg / 6kg) multiply the size of the cylinder by 1.96

e.g. 47kg cylinder = 47 x 1.96 = 92.12 litres

If you are using a butane cylinder (13kg / 7kg / 4.5kg) multiply the cylinder size by 1.724

e.g. 13kg cylinder = 13 x 1.724 = 22.412 litres