How this calculator works
The calculator combines caffeine and theobromine as methylxanthines. Published product averages cannot determine an individual outcome. For percentage-labelled bars, the estimate multiplies unsweetened chocolate concentration by cocoa fraction. Other foods need a known concentration from a professional; cocoa percentage alone cannot describe a cake or coffee drink. Do not delay a call while measuring.
Formula
Total methylxanthines (mg) = product mass (g) × concentration (mg/g). Exposure (mg/kg) = total mg / dog kg. Inverse modes reconstruct an exposure from information already known; they do not find an allowable amount.
Worked example
If a 10 kg dog eats 100 g of milk chocolate at 2.3 mg/g, the estimated total is 230 mg and exposure is 23 mg/kg. Call veterinary help immediately; the calculation cannot predict the outcome.
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Frequently asked questions
Can a small number be considered safe?
No. The amount eaten, ingredients and concentration may be uncertain. Veterinary assessment is needed even when the calculated exposure is low.
What if the dog seems normal?
Contact a veterinarian now. Waiting for signs can delay appropriate care.
Who can I call?
Call your local veterinarian or emergency clinic. Cornell lists Pet Poison Helpline at 855-764-7661 and ASPCA Animal Poison Control at 888-426-4435 in North America; fees may apply.