Important: a general reference only. Confirm exact dosing with your veterinarian before administering anything.
Updated · How we check our tools
What is the Dog Xylitol Toxicity Calculator?
Xylitol can make a dog's blood sugar crash at doses above 100 mg per kg of body weight, and above 500 mg/kg it can cause liver failure. For a 20 lb dog that first threshold is only about 0.9 g, which a single piece of some sugar-free gums can contain.
The Dog Xylitol Toxicity Calculator works out whether the xylitol in sugar-free gum or a labeled product is a dangerous dose for your dog. Many common household foods and products that are harmless to people are toxic to pets, and knowing the warning signs can make the difference in an emergency.
A well-cared-for dog usually lives somewhere between 10 and 13 years. As an omnivore, what a dog needs from its diet changes across its life stages. Dogs live indoors with their family, needing daily exercise, mental stimulation, and a securely fenced outdoor area for larger or high-energy breeds. Keep an eye out for dental disease, obesity, ear infections (in floppy-eared breeds). These are the conditions dogs are most commonly seen for.
How much xylitol is dangerous for a dog
| Dog weight | Low blood sugar from | Liver failure risk from |
|---|---|---|
| 10 lb | 0.45 g | 2.27 g |
| 20 lb | 0.91 g | 4.54 g |
| 30 lb | 1.36 g | 6.8 g |
| 50 lb | 2.27 g | 11.34 g |
| 70 lb | 3.18 g | 15.88 g |
How does the Dog Xylitol Toxicity Calculator work?
The check is based on commonly documented toxic substances and warning signs for dogs, referenced against veterinary and poison-control sources. Treat the result as a well-founded estimate. Every dog is an individual, and your vet's judgement outranks any online tool.
What changes the answer
- The specific substance or food involved, and how much was consumed or encountered
- Your dog's size, smaller animals are affected by smaller amounts
- How quickly symptoms appear: which varies by substance
- Any existing health conditions that could increase risk
How do you use the Dog Xylitol Toxicity Calculator?
- Enter the your dog's weight in whichever unit you use (lb, oz, kg)
- Answer "What was eaten?"
- Answer "How many pieces, or how many grams?"
- Press Calculate, then read the result alongside the sources listed below
If the result looks wrong, check your inputs before you worry. Entering weight in the wrong unit is easily the most common reason a figure looks off.
For related questions, see the other safety tools or browse every dog tool.
Before you rely on this
One number on one day is rarely the full picture. What matters more is the direction of travel: whether your dog is trending steadily, drifting, or changing suddenly. A sudden change is always worth a call to your vet, even when the individual figure still falls inside a normal range.
Sources and references
The formulas, reference ranges and species data behind the Dog Xylitol Toxicity Calculator come from these veterinary references, professional bodies and published research.
- Merck Veterinary ManualXylitol Toxicosis in Dogsmerckvetmanual.com(opens in a new tab)
- petpoisonhelpline.comPet Poison Helplinepetpoisonhelpline.com(opens in a new tab)
- ASPCA Animal Poison ControlPeople Foods to Avoidaspca.org(opens in a new tab)
- vet.cornell.eduCornell University College of Veterinary Medicinevet.cornell.edu(opens in a new tab)
- Merck Veterinary ManualToxicologymerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
- Instant resultsNo page reload, no waiting and no account. Enter your details and the result appears straight away.
- Private by designCalculations run in your browser. Nothing you enter is stored on our servers or shared with anyone.
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