Pet Medication Dosage Calculator
Estimate a weight-based medication dose for a pet from its body weight and a prescribed dose in mg per kg, with an optional conversion to mL. This is informational only and is not veterinary advice. Do not medicate your pet on your own. Many human and pet drugs are toxic to animals, and dosing differs by species and condition, so always confirm the exact drug, dose and schedule with your veterinarian before giving anything.
How to use the pet medication dosage calculator
- Enter your pet's weight in pounds or kilograms.
- Enter the prescribed dose in mg per kg from your vet.
- Optionally enter the liquid concentration in mg per mL.
- Read the total dose in mg and the volume in mL, then confirm with your vet.
Examples
10 kg dog at 5 mg/kg
Weight 10 kg, dose 5 mg/kg, concentration 50 mg/mL
Total dose 50 mg, which is 1 mL of the liquid
22 lb pet at 10 mg/kg
Weight 22 lb (about 9.98 kg), dose 10 mg/kg
Total dose about 99.79 mg
Frequently asked questions
Is this calculator veterinary advice?
No. It is an informational estimate only and must not be used to medicate an animal on your own. Always confirm the exact drug, dose and schedule with your veterinarian, who will account for your pet's species, age, health and other medicines.
How is the dose calculated?
Total dose in mg equals body weight in kg times the prescribed dose in mg per kg. Pounds are converted to kg first using 1 lb = 0.45359237 kg. If you enter a concentration in mg per mL, the tool divides the dose by it to estimate the volume in mL.
Where do I find the concentration in mg per mL?
Liquid medicines list a concentration such as 50 mg per mL on the label or prescription. Enter that value to convert the milligram dose into a volume. For tablets, the dose stays in milligrams.
Can I give my pet a human medication?
Not without veterinary direction. Many common human drugs, including some pain relievers, are dangerous or fatal to dogs and cats even in small amounts. Never assume a human medicine or dose is safe for a pet.
What if I think my pet was overdosed or poisoned?
Contact your veterinarian or an animal poison control line right away. Do not wait for symptoms. Have the product name, strength and the amount given ready so they can advise you quickly.
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