What this calculator does
Dog chocolate toxicity risk works out theobromine dose from chocolate eaten, checked against published toxicity thresholds. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaDose (mg/kg) = (chocolate type mg theobromine per oz × oz eaten) / dog weight (kg)
The inputs explained
| Field | What to enter |
|---|---|
| Chocolate type | Choose from Unsweetened baking chocolate, Dark / semi-sweet chocolate, Milk chocolate, White chocolate (negligible). |
| Amount eaten (oz) | A number, measured in oz. Starts at 2. |
| Dog's weight (kg) | A number, measured in kg. Starts at 15. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with amount eaten
Every other input is held at the calculator’s starting values while amount eaten varies. Select any row to load that scenario into the calculator.
How the answer changes with amount eaten
| Amount eaten (oz) | Theobromine dose | Total theobromine eaten | Risk level |
|---|---|---|---|
| 1 | 10.0 mg/kg body weight | 150 mg | Below typical mild-toxicity threshold |
| 1.5 | 15.0 mg/kg body weight | 225 mg | Below typical mild-toxicity threshold |
| 2 | 20.0 mg/kg body weight | 300 mg | Mild signs possible (vomiting, restlessness) |
| 3 | 30.0 mg/kg body weight | 450 mg | Mild signs possible (vomiting, restlessness) |
| 4 | 40.0 mg/kg body weight | 600 mg | Moderate–severe risk (cardiac symptoms possible) |
| 6 | 60.0 mg/kg body weight | 900 mg | Severe risk (potential for seizures): treat as an emergency |