Chocolate Toxicity Calculator for Cats
If your cat may have eaten chocolate, contact your vet. Use this calculator to help describe the exposure.
You can gather the details below while arranging help. If the amount is unknown or your cat has symptoms, do not wait for a calculation.
Pet Poison Helpline: (800) 213-6680North America, 24/7. A consultation fee applies. Elsewhere, contact your local emergency veterinarian.
Gather the details for your vet
If you know the type and amount eaten, add them below. Chocolate strength varies, so the calculated dose is only an estimate.
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A few common questions
Can this tell me my cat is safe?
No. Chocolate exposure should be discussed with a veterinarian or poison control, especially when the amount or type is uncertain.
Why does chocolate type matter?
Darker and baking chocolates usually contain more methylxanthines than milk or white chocolate, so smaller amounts can be more concerning.
About this tool & sources
Your cat's health and history can change what is right for them. Use these results to support a conversation with your veterinarian. They cannot confirm a diagnosis or prescribe treatment.
Updated 2026-10-05
How this tool works
This estimates combined methylxanthine exposure. Product concentrations vary, and the 20/60 mg/kg action bands are site routing based on dog references, not validated cat thresholds.
View rules and sources
White chocolate
Published value1.1 mg methylxanthines per oz.
The current value matches the source's combined-methylxanthine table. Brand and recipe variation still apply.
Milk chocolate
Published value64 mg methylxanthines per oz.
The current value matches the source's combined-methylxanthine table. Brand and recipe variation still apply.
Dark chocolate
Published value150 mg methylxanthines per oz.
The source's sweet dark/semisweet range is 150–160 mg/oz. The tool selects its lower endpoint; a high-cocoa bar may contain substantially more.
Semi-sweet chocolate
Published value150 mg methylxanthines per oz.
The source's sweet dark/semisweet range is 150–160 mg/oz. The tool selects its lower endpoint; a high-cocoa bar may contain substantially more.
Baker's unsweetened chocolate
Published value440 mg methylxanthines per oz.
The current value matches the source's combined-methylxanthine table. Brand and recipe variation still apply.
Dry cocoa powder
Published value807 mg methylxanthines per oz.
The current value matches the source's combined-methylxanthine table. Brand and recipe variation still apply.
Cocoa beans or cacao nibs
Site estimate or rule600 mg methylxanthines per oz.
No same-product concentration was established in the checked source. Cocoa bean hulls are different from beans/nibs; coffee and coating amounts vary. This fixed value is a site estimate.
Chocolate-covered coffee beans
Site estimate or rule300 mg methylxanthines per oz.
No same-product concentration was established in the checked source. Cocoa bean hulls are different from beans/nibs; coffee and coating amounts vary. This fixed value is a site estimate.
Exposure arithmetic
Unit or portion arithmeticEstimated mg/kg = amount in oz × mg/oz ÷ cat weight in kg. 1 lb = 16 oz; 1 oz ≈28.3495 g.
The estimate includes theobromine and caffeine together. Amount eaten, product identity and concentration can all be uncertain.
Action bands
Site estimate or rule≥60 mg/kg: emergency; ≥20 and <60: urgent call; any lower non-white exposure: call for guidance; lower white exposure: verify and call for symptoms/uncertainty.
The reference's 20 mg/kg mild-sign and ≥60 mg/kg seizure examples explicitly concern dogs. This site's action bands are not validated feline toxicity cutoffs, and a lower estimate does not establish safety.
Unknown selection
Site estimate or ruleAn unrecognized type falls back to milk chocolate; brand, time and symptoms are not used in the arithmetic.
This is site behavior, not a reliable estimate for an unknown product. A veterinarian or poison service needs the actual package and exposure details.
Published values support the stated reference scope. They do not establish the accuracy or clinical validity of this tool.
Sources checked · No professional review recorded. Source checking is a record of reading, not a clinical review.