What is 84g converted into ml

Question

Wondering whether buying 12*7g sachets of something is better value than buying a 50ml bottle of it. The 12 sachets and one bottle are of equal price.

Answer 1

Look at the dosage/application and work a per dosage/application price.

i.e. If 1 sachet is an application, then if you need more than 4ml per dose then the sachets are better value

As a general rule I have found a bottle to be better value than sachets.

Answer 2

to convert from mass to volume, you need the density