Chocolate toxicity calculator
Estimate methylxanthine dose and toxicity level for dogs. Other species require reference-specific guidance.
Reference ranges & assumptions
Defaults align with Merck/MSD Veterinary Manual methylxanthine guidance: mild signs near 20 mg/kg, cardiotoxic effects around 40–50 mg/kg, seizures at 60 mg/kg or higher, with patient variability. Adjust to the specific product label or toxicology reference.
Safety checks
- This tool supports calculation and education only.
- It does not diagnose, prescribe, or replace current clinical references.
- Verify patient-specific decisions with current toxicology references, hospital protocols, and veterinarian judgment.
- Chocolate concentrations vary by brand and recipe. Use custom input when unsure.
- Confirm weight and amount units before calculating.
Basis and limits
- Calculation basis: total methylxanthines (mg) = amount (oz) × mg/oz. Dose (mg/kg) = total mg / body weight (kg).
- Assumed concentrations: defaults are estimates and vary by brand. Adjust in the Assumptions panel to match the specific product.
- Toxicity thresholds: defaults are mild ~20 mg/kg, moderate ~40 mg/kg, severe ~60 mg/kg, lethal ~100 mg/kg. Adjustable in assumptions.
- Scope: this tool estimates exposure. It does not replace toxicology consultation or clinical judgment.
Formula audit trail
1. Convert amount to ounces if entered in grams (g ÷ 28.35).
2. Total methylxanthines (mg) = ounces × mg/oz.
3. Dose (mg/kg) = total mg / body weight (kg).
4. Toxicity level is categorized against the editable thresholds in the Assumptions panel.
Calculation steps will appear here for verification.
Related tools
Last reviewed: May 2026
Sources: ASPCA Animal Poison Control Center; Merck Veterinary Manual