Dog Caffeine Toxicity Calculator
Dog got into coffee, tea, an energy drink or caffeine pills? Enter their weight and how much to see the dose, the risk level, and what to do next.
A large mug runs higher; decaf is only ~3 mg.
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.
How the caffeine dose is worked out
Caffeine is a stimulant that dogs clear from the body far more slowly than people do, so risk comes down to dose— the milligrams of caffeine swallowed divided by your dog's weight. This tool multiplies the amount you enter by a typical caffeine content for that source, then divides by body weight to map it to a risk level. Caffeine and chocolate's theobromine are close cousins, which is why coffee and chocolate are both on the no-list.
The concentrated sources to worry about
A spilled latte is one thing; a chewed packet of caffeine or diet pills, a bag of dry coffee grounds or beans, loose tea bags, or an energy drink are another — each packs far more caffeine per bite. Pre-workout powders are especially dangerous. If your dog reached one of these, run the numbers and lean toward calling.
Frequently asked questions
- How much caffeine is toxic to dogs?
- Mild signs (restlessness, a fast heart) can start around 9 mg of caffeine per kg of body weight, serious problems around 20 mg/kg and up, and seizures become a risk past about 40–50 mg/kg. For a 10 kg (22 lb) dog that's roughly one caffeine pill or a couple of cups of coffee. The calculator does the math from what your dog had.
- My dog drank a little coffee — is that dangerous?
- A lap or two of milky coffee is usually more of a stomach upset than a poisoning for a medium or large dog. But caffeine pills, tea bags, dry grounds and energy drinks are far more concentrated. Enter the amount to be sure, and watch for hyperactivity, panting and a racing heart.
- What are the symptoms of caffeine poisoning in dogs?
- Restlessness and hyperactivity first, then panting, a fast or irregular heartbeat, vomiting, tremors and high blood pressure. In severe cases: high body temperature, collapse and seizures. Signs usually start within 1–2 hours and can last 12 hours or more.
- What should I do if my dog ate caffeine?
- Note the source and amount and run the numbers. If the result is moderate or higher, call your vet or a poison line right away — they may induce vomiting and give fluids. Don't wait for symptoms with caffeine pills or dry grounds, which hit hard.
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.
- Caffeine — Pet Poison Helpline
- People foods to avoid feeding your pets — ASPCA
- Animal Poison Control Center — ASPCA