Pet Medication Calculator — Dosage by Body Weight
Dose per Administration
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Volume/Tablets per Dose
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Total Daily Dose
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How This Calculator Works
Accurate medication dosing is critical for pet safety and treatment effectiveness. This calculator multiplies your pet's body weight by the prescribed dose rate (mg per pound) to determine the correct dose per administration. It then divides by the medication concentration to give you the volume or number of tablets needed.
Always use the dose rate prescribed by your veterinarian. Different medications have vastly different therapeutic ranges, and some human medications are toxic to pets. Never administer medication to your pet without veterinary guidance. This calculator is a dosing aid, not a substitute for professional veterinary advice.
When measuring liquid medications, use an oral syringe for accuracy. For tablets, your vet may advise splitting or crushing depending on the medication type. Some medications must not be split or crushed. Always complete the full prescribed course of antibiotics even if your pet appears better.
Frequently Asked Questions
Can I give human medication to my pet?
Many human medications are toxic to pets. Never give your pet any medication without consulting your veterinarian first. Common human drugs like ibuprofen, acetaminophen, and xylitol are dangerous or fatal to dogs and cats.
What if I miss a dose?
Give the missed dose as soon as you remember, unless it is almost time for the next dose. Do not double up. Contact your vet if you are unsure.
How do I convert between mg/lb and mg/kg?
To convert mg/lb to mg/kg, multiply by 2.205. For example, 5 mg/lb equals approximately 11 mg/kg. Many veterinary references use mg/kg.