In the mixture that you have OP, there's 0.5mg of Hydrocodone per Milliliter of fluid. Generally, when you are dispensed an entire bottle of syrup of any kind, the "quantity" on the side of the bottle, which would normally indicate # of dosage units/pills is going to indicate the number of Ml's in the bottle. My Chlorhexidine rinse from my recent oral surgery indicates 473 dosage units, as it's a pint of fluid.
Your bottle should come with a dosing cap that will help you figure out how much medication you're taking. If you don't have one, pharmacists will generally give you a cheap oral syringe with measurements for free from behind the counter. If you tell them that you don't have a device for measuring your Opioid painkillers, they're pretty much duty-bound to give you one.
Beware of the amount of APAP that you end up consuming.
Immediate-release: 325 mg to 1 g orally every 4 to 6 hours
Minimum Dosing Interval: every 4 hours
Maximum Single Dose: 1000 mg
Maximum Dose: 4 g per 24 hours
Median Lethal Dose/24 hour period: 24g
These are just guidelines. You could be seriously harmed by much less than the above-posted dosages. You could also be harmed by taking significantly lower dosages over a longer period of time (chronically). Back before CWE really became a well-known and understood method, Vicodin/Percocet addicts would routinely show up to the hospital with liver damage/failure. They still do. Unfortunately, most syrups/elixirs aren't in a suitable form to be extracted through this method. At least not easily and not by an amatuer, so proceed with caution.
