Estimate how much THC your dog may have ingested per kilogram of body weight and see the likely severity band — based on published veterinary toxicology thresholds.
Your dog's body weight
What did your dog get into?
What this tool is about
As cannabis becomes more widely available, accidental THC ingestion is now one of the most common reasons dogs end up at the emergency vet. Dogs are unusually sensitive to THC because they have a far higher density of cannabinoid receptors in the brain than humans do — meaning a "harmless" amount for a person can leave a dog wobbly, disoriented and frightened.
The THC Toxicity in Dogs Calculator turns a scary, uncertain moment into a clear number. By combining your dog's weight with the type and amount of product involved, it estimates the dose your dog received in milligrams of THC per kilogram of body weight — the same unit veterinarians use — and maps it onto published toxicity bands so you understand how concerned to be while you seek professional help.
How does it work?
- Enter the weight. Switch between kilograms and pounds — pounds are converted automatically (1 lb ≈ 0.4536 kg).
- Pick the product. Edibles, dried flower, concentrates and tinctures each carry very different amounts of THC for the same physical size, so the tool asks for the right detail for each.
- Estimate the quantity. The calculator works out the total milligrams of THC involved — for plant material it uses the potency percentage, for tinctures the mg-per-mL strength.
- Read the band. Total THC is divided by body weight to give a mg/kg dose, which is placed on a Minimal → Mild → Moderate → Severe scale with the signs typically seen at that level.
Formula explanation
The toxicity bands come from veterinary literature: mild signs can appear from roughly 0.3 mg/kg, moderate signs above about 2–3 mg/kg, and clearly severe presentations as the dose climbs into the tens of mg/kg and beyond. For context, the probable lethal oral dose is estimated to exceed 3,000 mg/kg — roughly a thousand times the dose that causes visible signs — which is why deaths are extremely rare even though dogs can look very unwell.
Practical benefits for users
- Removes the guesswork at a stressful moment by translating "she ate part of a gummy" into a real, vet-comparable number.
- Helps you triage — it shows whether you're likely looking at watchful monitoring or an urgent dash to the clinic.
- Speeds up the vet call by letting you report an estimated mg/kg dose and product type rather than vague descriptions.
- Educates owners on why product type matters so much — the same gram of flower and concentrate are worlds apart.
- Works on any device, free, with nothing to install — useful exactly when seconds count.
Frequently asked questions
Yes — call anyway. Signs from edibles can take 1–3 hours (longer on a full stomach) to appear, so "fine right now" doesn't rule out trouble. A quick call lets your vet decide whether monitoring at home or early decontamination is safest.
The classic picture is sedation and wobbliness: stumbling, glazed eyes, dribbling urine, sensitivity to light and sound, low body temperature and a startle that ends in a brief sway. Higher doses can bring agitation, tremors or a slowed heart rate. Most dogs recover fully within 24–96 hours with supportive care.
It gives a realistic worst-case estimate, not a lab measurement. Real outcomes vary with the individual dog, stomach contents, how much was truly swallowed versus chewed, and product labelling accuracy. Treat the result as a guide to urgency, not a substitute for examining your dog.
Death is rare. The estimated lethal dose is enormous — over 3,000 mg/kg — compared with the small doses that cause symptoms. The bigger real-world risks are secondary problems like aspiration, injury from incoordination, or another toxic ingredient (chocolate, xylitol, raisins) in the same edible, which is another reason to involve a vet.
Disclaimer
This calculator is for educational and informational purposes only and is not veterinary advice, diagnosis or treatment. Estimates are based on general published thresholds and cannot account for your dog's individual health or the true contents of any product. If you suspect your dog has ingested THC, contact your veterinarian or an animal poison control service immediately. Never delay professional care based on this tool.
