💊 Pet Medication Dosage Calculator
An educational reference that turns an animal's weight and a vet-prescribed dose rate into milligrams and millilitres per dose. Educational only — confirm every medication and dose with a licensed veterinarian before giving anything to an animal.
🔧 Check a Dose
What is a Pet Medication Dosage Calculator?
This is a safe, transparent arithmetic aid: given an animal's body weight and a dose rate your veterinarian has prescribed, it works out the milligrams per dose, the millilitre volume for a liquid, and the total per day. It makes no medical judgement of any kind.
It is educational only and is never a substitute for veterinary care. Always confirm every medication and dose with a licensed veterinarian.
Used responsibly alongside a vet-approved protocol, it can help shelter staff and fosters double-check their math when dosing animals of many different sizes — but the dose rate, the drug choice, and the final decision must always come from a veterinarian.
❓ Frequently Asked Questions
Is this calculator a substitute for a veterinarian?
No — absolutely not. This tool is educational only and performs nothing more than transparent arithmetic on numbers you supply. It cannot choose a medication, decide whether a drug is safe for a given animal, account for species sensitivities, weight estimation errors, drug interactions, or health conditions, or catch a typo in the dose rate. Confirm every medication and every dose with a licensed veterinarian before giving anything to an animal. Many human and even some pet medications are toxic to certain species at the wrong dose, so professional guidance is non-negotiable.
How does the dosage math work?
The calculator multiplies the animal's body weight in kilograms by the dose rate in milligrams per kilogram your veterinarian prescribed, giving the milligrams per dose. If you also enter the liquid concentration in milligrams per millilitre, it divides to give the volume in millilitres per dose, and it multiplies by doses per day to show the daily total. That's all it does — it does not decide what the dose rate should be. The dose rate must come from your vet or an authoritative veterinary source, never from a guess.
What's the difference between mg per dose and mL per dose?
Milligrams measure the actual amount of active drug; millilitres measure the volume of liquid you draw up to deliver that amount. They're only related through the medication's concentration — for example, a 50 mg/mL suspension delivers 50 milligrams in every millilitre. For tablets you generally care about milligrams; for liquids and injectables you need the millilitre volume so you can measure it with a syringe. Always double-check the concentration printed on the specific bottle you're using, because the same drug comes in different strengths.
Why is getting the dose exactly right so important in a shelter?
Shelters dose a high volume of animals of wildly different sizes, often under time pressure, which is exactly when errors creep in. An underdose can let an infection or parasite persist; an overdose can be dangerous or fatal, especially for small animals, neonates, and species with known drug sensitivities. Weigh each animal accurately rather than estimating, use this tool only to check arithmetic against a vet-approved protocol, and have a second person verify doses for high-risk medications. When anything is uncertain, stop and call your veterinarian.