Units of Measure used in the Inscription-Subscription 1 cc., cc cubic centimeter, USP states 1 cc is equivalent to 1 ml fl, fld. Gram, NB don't confuse with gr. Drop, In general not a rigidly standardized measure. Modern preparations are dispensed with the calibrated dropper included with the manufactured product. Minum, NB Don't confuse with ml mcg.
Some formulas indicate the ratio of ingredient quantities to each other.
In a formula given in terms of parts by weight, any unit of weight may be used, but it must be applied to all components. In a formula given in parts by volume, any unit of volume may be used, provide that all components have the same units. Ratio Ratio strength is a way of representing the concentration of a formula Strength component. It is denoted in terms of total amount of solution or mixture that contains one unit of solute. N.B. the second number in the ratio does not describe the quantity of solvent, but the total quantity of solution.