What is the Dog Ibuprofen Toxicity Calculator?
Ibuprofen (the active ingredient in many human pain relievers such as Advil and Motrin) is dangerous to dogs. Even a single tablet can cause serious harm in a small dog. This calculator estimates the ingested dose in milligrams per kilogram of body weight and compares it against published toxicity thresholds so you can gauge the urgency. It is an informational tool only — if you suspect your dog ate ibuprofen, contact your veterinarian or a pet poison helpline immediately.
How to use it
Enter the total amount of ibuprofen your dog swallowed in milligrams. A common ingredient strength is 200 mg per tablet, so two 200 mg tablets equal 400 mg. Then enter your dog's body weight in kilograms (1 kg ≈ 2.2 lb). The calculator divides the total milligrams by the weight to give the dose per kilogram and tells you which risk tier it falls into.
The formula explained
The core equation is simply:
$$\text{Dose} = \frac{\text{Total Ibuprofen (mg)}}{\text{Weight (kg)}}\ \left[\tfrac{\text{mg}}{\text{kg}}\right]$$
Toxicity tiers used here follow commonly cited veterinary references: gastrointestinal signs (vomiting, ulcers) can begin above about 25 mg/kg, acute kidney injury becomes likely above roughly 175 mg/kg, and central-nervous-system effects such as seizures and coma may occur above about 400 mg/kg. Doses below 25 mg/kg still warrant a call to your vet.
Worked example
A 10 kg dog eats two 200 mg ibuprofen tablets (400 mg total).
$$\text{Dose} = \frac{400}{10} = 40\ \tfrac{\text{mg}}{\text{kg}}$$That exceeds the 25 mg/kg GI threshold, so gastrointestinal upset and ulcers are a real risk and veterinary care is needed.
FAQ
Is any amount of ibuprofen safe for dogs? No. There is no reliable safe over-the-counter ibuprofen dose for dogs; veterinarians use dog-specific medications instead.
What should I do if my dog ate ibuprofen? Call your veterinarian or an animal poison control center right away. Early decontamination greatly improves outcomes.
How do I convert pounds to kilograms? Divide the weight in pounds by 2.205. A 22 lb dog is about 10 kg.
