Is this calculator a substitute for veterinary advice?

No. This tool is for informational and educational purposes only. Always consult a licensed veterinarian before giving any medication to your dog. Doses can vary based on the dog's health status, age, breed, and concurrent medications.

What does mg/kg mean?

mg/kg stands for milligrams of drug per kilogram of body weight. For example, a dose rate of 5 mg/kg for a 10 kg dog means 50 mg total per dose.

Can I enter weight in pounds?

Yes. Select "lb" in the weight unit selector and the calculator automatically converts the weight to kilograms before computing the dose.

Why do the reference table doses show a range?

Many drugs have a therapeutic range rather than a fixed dose. The starting or low end is often used initially, and the veterinarian may adjust upward based on response and tolerance.

What if my dog needs a liquid medication?

This calculator outputs the dose in milligrams (mg). To convert to milliliters (mL) for a liquid, divide the mg dose by the drug's concentration in mg/mL — a step your veterinarian or pharmacist can assist with.

Are all dogs dosed the same way?

Body-weight dosing (mg/kg) is standard for most drugs, but some medications use fixed doses or dose by body surface area. Always follow your veterinarian's specific instructions.

Dog Medication Dosage Calculator

Enter your dog's weight and a dose rate to instantly calculate the correct medication dose, or pick from a reference table of common canine drugs.

Dose Calculator

Dog's Body Weight

Dose Rate (mg/kg)

Frequency

Disclaimer: For informational use only. Always confirm doses with a licensed veterinarian before administering any medication.

Enter weight and dose rate above, or pick a drug from the reference table below.

Common Canine Medication Reference

Click any row to auto-fill the dose rate above. Ranges shown are typical starting doses — always confirm with your veterinarian.

Drug Name	Common Use	Dose Rate (mg/kg)	Frequency

Sources: Plumb's Veterinary Drug Handbook & standard veterinary formularies. This table is for reference only.

Summary

This calculator computes the correct medication dose for a dog by multiplying the dog's body weight by the drug's dose rate in mg/kg. Simply enter the weight (in kg or lb) and the dose rate, and the tool returns the total dose in mg. A built-in reference table covers common canine medications so you can quickly look up standard dose rates.

How it works

Enter your dog's body weight in kilograms or pounds.
Enter the drug's dose rate in mg/kg (milligrams per kilogram of body weight).
Optionally select a frequency to estimate the daily total.
Click Calculate to see the single dose and daily dose in milligrams.
Or click any drug in the reference table to auto-fill its typical dose rate.
Always confirm the calculated dose with a licensed veterinarian before administering.

Use cases

Quickly verify a prescribed dose against your dog's current weight.
Look up standard dose rates for common canine medications.
Calculate doses when switching between kg and lb weight measurements.
Estimate total daily drug intake for medications given multiple times per day.
Cross-check over-the-counter canine products for correct dosing.
Educational reference for veterinary students learning pharmacology.
Help pet owners understand the math behind their vet's prescription.

Frequently Asked Questions

Last updated: 2026-09-30 · Reviewed by Nham Vu