Pet Medication Dosage Calculator
How It Works
This pet medication dosage calculator uses established formulas to provide accurate results.
The basic rule:
- Dose = Pet Weight (kg) × Dose Rate (mg/kg)
- Weight in kg = Weight in lbs × 0.4536
- Tablets = Dose (mg) / Tablet Strength (mg)
- Cat doses are typically 50% of dog doses per kg body weight
Results are estimates. Consult a professional for critical decisions.
Frequently Asked Questions
How much Benadryl can I give my dog?
The standard Benadryl (diphenhydramine) dose for dogs is 1 mg per pound of body weight, given 2-3 times daily. A 50 lb dog would take 50 mg (two 25 mg tablets). Maximum dose is 2 mg per pound. Only use plain diphenhydramine — avoid Benadryl products containing decongestants (pseudoephedrine) or acetaminophen (Tylenol), which are toxic to dogs. Always check with your vet before giving Benadryl, especially if your dog takes other medications.
What OTC medications are safe for dogs?
Generally safe OTC medications for dogs (with vet approval) include: Benadryl (diphenhydramine) for allergies, Pepcid (famotidine) for stomach acid, buffered aspirin for short-term pain (not long-term), Dramamine for motion sickness, Imodium for diarrhea (not in herding breeds), and fish oil supplements. NEVER give dogs: ibuprofen (Advil), acetaminophen (Tylenol), naproxen (Aleve), or any human cold/flu medication. Always call your vet before giving any OTC medication.
Can I give my cat the same medications as my dog?
No — cats metabolize drugs very differently from dogs. Many medications safe for dogs are toxic to cats. Never give cats aspirin (except under strict vet supervision at very low doses), ibuprofen, acetaminophen (even one regular-strength Tylenol can kill a cat), or any medication containing pseudoephedrine. Benadryl, Pepcid, and melatonin can be given to cats at lower doses, but always consult a veterinarian first.
Why should I always consult my vet before giving medications?
Individual pets may have conditions, allergies, or drug interactions that make standard doses unsafe. Certain breeds have genetic mutations (like MDR1 in herding breeds) that make them hypersensitive to specific drugs. Your vet knows your pet's full medical history and current medications. Dosage calculators provide general guidelines, but your vet can identify contraindications and recommend the most appropriate treatment for your pet's specific situation.