Disclaimer

Last updated: September 2026. Please read this page carefully before using our calculators.

Educational information only

All content on PetMath — calculators, articles, tables, and examples — is published for general educational purposes. It is not veterinary advice and is not a substitute for a qualified professional. We are not veterinarians, and no client or advisory relationship is created by your use of this Site.

Pet owners often use our tools in stressful moments — especially the chocolate toxicity calculator. Please treat its output as a first-data-point, not a diagnosis. Toxicity depends on the exact cocoa content of the product, the time since ingestion, your dog's individual sensitivity, and other health factors no web calculator can see.

If your pet ate chocolate, xylitol, grapes, or anything else potentially harmful, contact your veterinarian or a pet poison hotline (such as the ASPCA Animal Poison Control Center) immediately — do not wait for symptoms to appear, and never induce vomiting without professional guidance.

Accuracy of calculations

We implement well-known, publicly documented formulas (see the methodology section on each calculator page and AVMA, AKC, and Merck Veterinary Manual public guidance as applicable). Even correctly implemented formulas produce estimates that depend on your inputs and assumptions. Real-world outcomes vary. Do not rely on a single web tool for a consequential decision.

Advertising disclosure

PetMath is funded by display advertising served through Google AdSense. Advertisers have no influence over our content, formulas, or editorial choices, and placement of an ad is not an endorsement.

Errors and corrections

If you spot an error, please email contact@nftycalcs.com with the inputs you used. Verified corrections are published promptly.