Dog Xylitol Toxicity Calculator

Enter Calculation

Dog's Weight

Weight Unit Kilograms (kg) Pounds (lb)

Xylitol Ingested (mg)

OR Gum Pieces (mg each)

Xylitol per Gum Piece (mg) Typical sugar-free gum: 200–1000 mg per piece. Leave gum fields blank if entering total mg directly.

Results

Estimated Xylitol Dose

0

mg per kg body weight

Below known toxic threshold (<100 mg/kg)

Risk level (0=none, 1=hypoglycemia, 2=liver)	0
Total xylitol ingested	0 mg
Dog weight (kg)	10 kg
Hypoglycemia threshold	100 mg/kg
Liver failure threshold	500 mg/kg

This tool is an educational estimate only. If your dog may have eaten xylitol, contact your veterinarian or a pet poison helpline IMMEDIATELY — do not wait for symptoms.

What This Calculator Does

Xylitol is a sugar substitute found in sugar-free gum, mints, candy, baked goods, peanut butter, toothpaste, and some medications. In dogs it triggers a rapid insulin release that can cause life-threatening low blood sugar (hypoglycemia) and, at higher doses, acute liver failure. This calculator estimates the dose your dog may have received in milligrams per kilogram (mg/kg) and flags whether that dose crosses known danger thresholds.

How to Use It

Enter your dog's weight (kilograms or pounds). Then either type the total xylitol ingested in milligrams, or enter how many pieces of gum/candy were eaten along with the xylitol content per piece. The tool converts weight to kilograms, totals the xylitol, and divides to find the dose per kilogram. Sugar-free gum commonly contains 200–1000 mg of xylitol per piece, but amounts vary widely by brand — when unsure, assume the higher end.

The Formula Explained

The core math is simple: Dose (mg/kg) = total xylitol (mg) ÷ body weight (kg).

$$\text{Dose} = \frac{\text{Xylitol (mg)}}{\text{Weight (kg)}} \quad \left[ \frac{\text{mg}}{\text{kg}} \right]$$

Veterinary toxicology guidelines treat doses above 100 mg/kg as a hypoglycemia risk and doses above 500 mg/kg as a risk of hepatic (liver) failure. These are screening thresholds, not guarantees — individual dogs vary.

Dose equals total xylitol in milligrams divided by the dog's body weight in kilograms.

Xylitol dose thresholds: hypoglycemia risk above 100 mg/kg and liver failure risk above 500 mg/kg.

Worked Example

A 10 kg dog eats 4 pieces of gum containing 300 mg of xylitol each. Total xylitol = \(4 \times 300 = 1{,}200\) mg. Dose = \(1{,}200 \div 10 = \mathbf{120}\) mg/kg. Because 120 is above 100 mg/kg but below 500 mg/kg, this falls in the hypoglycemia-risk zone — an urgent reason to call a veterinarian.

FAQ

Is any amount of xylitol safe for dogs? No amount is considered safe. Even sub-threshold exposure warrants monitoring and a call to your vet.

How fast do symptoms appear? Hypoglycemia can develop within 30–60 minutes (sometimes longer with gum). Liver damage may appear over 12–72 hours. Do not wait for symptoms.

What should I do right now? Contact your veterinarian or a pet poison helpline immediately. This calculator is an educational estimate and does not replace professional emergency care.