Free Veterinary Clinical Tool
Veterinary Drug Dose Calculator
mg/kg · Tablets · Liquids · Injections
Enter weight, dose per kg, concentration and frequency — get instant, copy-ready results for dogs, cats and all animals. Need doses? Browse Vet Drugs List →
✅ mg/kg & μg/kg
✅ Tablets, Liquids & Injections
✅ Copy & Print
✅ kg ⇄ lb
📄 Free Vet Drug Doses PDF — complete mg/kg dosing tables for small & large animals.
Download Free →💊
Calculate Drug Dose
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How It Works
- 1Enter patient weight and choose kg or lb — or convert instantly.
- 2Enter the dose per kg in mg/kg or μg/kg.
- 3Select dosage form and enter the concentration.
- 4Pick a frequency or enter a custom interval in hours.
- 5Hit Calculate — then copy or print the result.
📐 Dose Formulas
Total dose (mg)weight(kg) × mg/kg
Volume (mL)total mg ÷ mg/mL
Tabletstotal mg ÷ mg/tab
Daily totalper dose × doses/day
μg/kg → mg/kg÷ 1000
lb → kg÷ 2.2046
⚕️ Educational & Clinical Estimation Tool
Intended for use by veterinary professionals as a dosing aid only. Always verify doses against current formularies, the patient's clinical condition, organ function, and concurrent medications. Do not rely solely on this tool for clinical decisions.
References & Recommended Reading
Verify Dosing with Authoritative Sources
Always cross-check calculated doses with trusted formularies and clinical references.
📘 Formularies
🔎 Evidence-based
🧑⚕️ Vet-focused
🏆 Editor's Picks
Plumb's Veterinary Drug Handbook
Quick dosing & drug interactions
BSAVA Small Animal Formulary 11th Ed.
Concise drug monographs
Veterinary Pharmacology & Therapeutics
In-depth pharmacology reference
Saunders Handbook of Veterinary Drugs
Practical dosing tables
Need full-text references? Instant access to 3,000+ veterinary books.
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Frequently Asked Questions
Multiply the patient weight in kg by the dose in mg/kg to get total mg per dose. Divide that by the concentration (mg/mL or mg/tablet) to get volume in mL or number of tablets. This calculator automates all those steps.
mg/kg means milligrams of drug per kilogram of body weight. This weight-based method ensures each patient receives a dose scaled to their size — essential in veterinary medicine where patients range from a 0.5 kg hamster to a 700 kg horse.
Divide the μg/kg value by 1000. For example, 100 μg/kg = 0.1 mg/kg. This calculator handles the conversion automatically when you select μg/kg as your unit.
Divide the required dose in mg by the drug concentration in mg/mL. Example: a 10 kg dog at 5 mg/kg using a 25 mg/mL solution needs 50 mg ÷ 25 mg/mL = 2 mL. Select Liquid or Injection and enter concentration in mg/mL.
These are frequency abbreviations: q24h = once daily, q12h = twice daily, q8h = three times daily, q6h = four times daily. Use the Custom option to enter any other interval in hours between doses.
Tablets are rounded to the nearest ¼ tablet increment. This calculator rounds to the nearest ¼ and also shows the exact calculated value so you can decide what is clinically appropriate for each patient.