Given the information here, I believe that:

1 Giant Roll = 2.25+ Rolls = 2250+ Sheets

1 Double Roll = 2 Rolls = 2000 Sheets

1 Super Mega Roll = 6 Rolls = 6000 Sheets

1000 Sheets = 1 Roll = 0.5 Double Roll = 0.444 Giant Roll = 0.166 Super Mega Roll

1 Super Mega Roll = 2.666 Giant Roll = 3 Double Roll = 6 Roll = 6000 Sheets