Veterinary Drug Dosing Calculator

No -- this calculator applies no route-conversion multiplier at all. Dose Rate is always treated as already route-specific, exactly as your veterinarian prescribed it or the product label lists it for the route you select, so Dose per Administration and Volume per Dose come out the same regardless of which Route of Administration option is selected. The only thing Route of Administration changes is whether the injectable-only Volume Check sanity flag applies.

Real bioavailability by route varies enormously from drug to drug -- anywhere from under 10% to nearly 100% -- so a single generic multiplier could not accurately convert every medication's dose between routes, and stacking one on top of an already route-specific prescribed dose would risk a real overdose. If you genuinely need to convert a known dose to a different route, do that conversion yourself using verified bioavailability data for that specific drug from a veterinary pharmacology reference, then enter the already-converted number as Dose Rate.

It's a rough single-dose volume sanity check that applies only to injectable routes (oral and topical routes routinely use much higher volumes without concern, so the check doesn't apply to them). Even for injectable doses, treat it as an order-of-magnitude flag rather than an actual clinical limit -- real maximum injection volumes per site depend on the animal's species and the specific injection site's anatomy, not a flat mL-per-kg ratio, especially in very large or very small animals.

Volume per Dose describes a single administration -- how much to draw up or measure for one dose -- which depends only on Body Weight, Dose Rate, and Drug Concentration (Route of Administration doesn't factor into the dose math either, since Dose Rate is already route-specific). Doses per Day and Treatment Duration only scale that single-dose figure up into Daily Dose, Total Course Dose, and Total Course Volume, for planning how much medication you'll need in total.

No. This tool performs the arithmetic of converting a dose rate into a volume — it has no knowledge of your specific drug's actual pharmacology, the individual animal's health status, drug interactions, or species-specific safety margins. Always follow your veterinarian's prescribed dose and route, and confirm any calculated volume against the product label before administering it.