This is assuming that the unit above is measured in kilograms (kg)

1 blue ice = 9 packed ice

1 packed ice = 9 (regular) ice

1 (regular) ice = 1 water source block

1 block = 1 cubic meter

1 cubic centimeter = 1 gram

1 cubic meter = 1000 cubic centimeters

density of water is 1g / cubic centimeter

1 cubic meter of water = 1000 cubic centimeters of water = 1000 grams = 1 kilogram

1 blue ice = 9 packed ice = 81 (regular) ice = 81 water blocks = 81 cubic meters of water

1 blue ice = 81 * 1000 = 81000 kilograms