Gas Manager includes various tools for planning and blending scuba diving gases, including nitrox (EANx) and trimix partial pressure blending, top off and best mix calculators, as well as minimum and maximum operating depths (MOD), equivalent narcotic depths (END), equivalent air depth (EAD), and equivalent depth density (EDD) calculation.
WARNING: Safe gas blending requires proper training and equipment. Always personally analyse and label your fills before diving.