Dog Antifreeze Toxicity Calculator
Assess the danger when your dog is exposed to antifreeze (ethylene glycol) — by amount and dog weight.
What Is the Dog Antifreeze Toxicity Calculator?
Assess the danger when your dog is exposed to antifreeze (ethylene glycol) — by amount and dog weight.
Antifreeze (ethylene glycol) is one of the most deadly toxins dogs can encounter. It smells and tastes sweet, attracting dogs. Even a teaspoon is fatal for a small dog. Treatment must begin within hours of ingestion for a chance of survival.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Ethylene glycol itself has moderate toxicity, but it is rapidly metabolised in the liver to glycolic acid and oxalic acid — which are highly toxic. Oxalate crystals form in the kidney tubules, causing acute tubular necrosis and irreversible kidney failure. The minimum lethal dose in dogs is approximately 4.4 ml/kg of pure ethylene glycol (or approximately 5ml/kg of standard antifreeze at 95% concentration).
Treatment with fomepizole blocks alcohol dehydrogenase — the enzyme that converts ethylene glycol to its toxic metabolites. It must be given before significant conversion has occurred. Sources: ASPCA Animal Poison Control, Merck Veterinary Manual, Journal of Veterinary Emergency and Critical Care.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- ASPCA Animal Poison Control Center — Primary toxicology reference for toxic substances and risk thresholds
- Merck Veterinary Manual u2014 Toxicology — Detailed toxicology data, LD50 values, and treatment protocols
- Pet Poison Helpline — Clinical toxicology reference and emergency guidance
- Plumb's Veterinary Drug Handbook — Antidote dosing and treatment protocols for toxic ingestion
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.