Emergency signs after accidental ingestion can include vomiting, facial swelling, rapid breathing, weakness, or brown/blue gums. Contact a vet or poison hotline immediately.
How this dog paracetamol calculator works
This calculator performs a simple weight-based conversion. It multiplies your dog’s weight (in kg) by your veterinarian’s prescribed dose in mg/kg, then translates that amount into either tablets or mL.
- Single dose (mg) = Weight (kg) × Prescribed mg/kg
- Daily total (mg) = Single dose × Doses per day
- Tablets per dose = Single dose (mg) ÷ Tablet strength (mg)
- mL per dose = Single dose (mg) ÷ Liquid concentration (mg/mL)
Why caution is essential with paracetamol in dogs
Paracetamol (also called acetaminophen) can be dangerous if incorrectly dosed. Dogs have individual risk factors including age, liver health, concurrent medications, and hydration status. A “human-safe” amount is not automatically safe for dogs.
Extra caution: many over-the-counter products are combination medicines and may contain other ingredients that are toxic to pets. Never use mixed cold/flu products for a dog.
Never use this for cats
Cats are especially sensitive to paracetamol toxicity. Even small amounts can be life-threatening. This page is for dogs only, and only when a veterinarian has already given instructions.
Step-by-step: using the calculator correctly
- Enter your dog’s body weight and choose kg or lb.
- Enter the exact mg/kg dose your vet prescribed.
- Enter how many doses per day your vet instructed.
- Choose tablet or liquid and enter the strength/concentration.
- Click “Calculate Dose” and review the result carefully.
If your tablet result is difficult to split accurately (for example, requiring very tiny fractions), ask your veterinarian for a liquid formulation or a different strength.
Common dosing mistakes to avoid
- Confusing mg with mL.
- Using lb as if it were kg.
- Giving an extra dose too soon.
- Using sustained-release or combo human products without veterinary direction.
- Estimating tablet fractions by eye without checking.
What to do if a dose is missed or duplicated
If you miss a dose, contact your vet clinic for timing instructions rather than doubling the next dose. If a duplicate or accidental overdose may have occurred, call your veterinarian or a pet poison service immediately. Quick treatment is important.
Signs of possible toxicity
Seek urgent care if your dog shows any of the following after medication exposure:
- Vomiting or drooling
- Lethargy, weakness, or collapse
- Facial/paw swelling
- Breathing difficulty or fast breathing
- Brown, gray, or blue-tinged gums
- Jaundice (yellow eyes/skin)
Final safety note
This calculator is a convenience tool for math, not a prescription engine. Always follow your veterinarian’s written plan, and verify any uncertainty before giving medication.