Dog Marijuana & THC Toxicity Calculator
Dog got into weed, an edible or THC oil? Enter their weight and the amount to estimate the dose and risk — and what to do next.
From the label, e.g. 10 mg/gummy × how many. ⚠️ Edibles often ALSO contain chocolate or xylitol.
Enter your dog's weight and how much they had to see the risk.
- ASPCA Animal Poison Control: (888) 426-4435 · US (fee may apply)
- Pet Poison Helpline: (855) 764-7661 · US/Canada (fee may apply)
This is an estimate to help you decide whether to call, not a diagnosis. When the amount is uncertain or your pet is small, young or unwell, treat it as more serious and pick up the phone.
Estimate only — not veterinary advice. Every animal is different; for a medication dose, a possible poisoning, or any emergency, call your veterinarian or an animal poison control line right away.
Why edibles are the scary ones
Plain plant material gives a fairly predictable, usually survivable intoxication. Edibles and concentrates change that: the THC is far more concentrated, and the product often also contains chocolate or xylitol — each a serious poison in its own right. A dog that eats a pan of pot brownies faces three problems at once, which is why this tool flags edibles and points you to the chocolate and xylitol calculators.
What to do right now
Tell your vet the truth — what, how much, and when. It's confidential to your pet's care and it genuinely changes the treatment. Call a vet or poison line (ASPCA 888-426-4435, Pet Poison Helpline 855-764-7661), especially for concentrated products, a small dog, or heavy sedation, and watch your dog's breathing and temperature while you arrange care.
Frequently asked questions
- How much THC is toxic to a dog?
- Dogs are sensitive to THC: wobbliness and other signs can appear from about 0.5–1 mg of THC per kg of body weight, with stronger effects at higher doses. The big variable is the product — a 10 mg gummy is very different from a whole package or concentrated oil. Enter the THC amount or the cannabis weight to estimate.
- My dog ate an edible — what's the danger?
- Two dangers. The THC itself causes intoxication — wobbliness, dribbling urine, dilated pupils, a low heart rate. But the edible may ALSO contain chocolate or xylitol, which are separate, serious poisons, so always check the ingredients and run those calculators too.
- Is marijuana fatal to dogs?
- Deaths are rare and usually involve very concentrated products (oils, large edibles) or the chocolate or xylitol in an edible. Most dogs recover within a day with supportive care, but the intoxication is distressing and some dogs need monitoring for breathing and temperature.
- What should I do — and will the vet judge me?
- Be honest with your vet about exactly what and how much; they're not there to judge, and the truth helps them treat your dog. Call a vet or poison line, especially for edibles or concentrates, a small dog, or a dog that's very sedated.
Sources
These are the references behind this calculator. Where a source gives a range we take the midpoint and round toward caution, and where we go beyond what a source states — an extra safety margin, or a rule of thumb rather than a clinical threshold — the page says so in the text above.
- Marijuana — Pet Poison Helpline
- Animal Poison Control Center — ASPCA