Pet Medication Dosage Calculator

Multiply your pet's weight (in lbs) by the prescribed dose rate (mg per lb) to get the total dose in milligrams. Then divide by the medication strength (mg per tablet or mg per mL) to find how many tablets or mL to give. Always follow your veterinarian's specific instructions.

Even small weight differences can significantly affect drug dosage, especially in small pets. A 1-lb error in a 5-lb cat represents a 20% dosing error. Always weigh your pet on an accurate scale before calculating medication doses.

Some human medications can be used in pets at different dosages (like diphenhydramine), but many are toxic to animals (such as acetaminophen for cats, xylitol-containing products, and ibuprofen). Never give your pet human medication without explicit veterinary guidance.