Benadryl Dosage Calculator for Dogs
Calculate the safe Benadryl (diphenhydramine) dosage for your dog based on body weight. Includes liquid and tablet forms.
Input Parameters
Enter details for calculation.
Recommended Dose
Expert Tip
Always use plain Benadryl containing only diphenhydramine. Never use products with decongestants or pain relievers, which are toxic to dogs.
Calculation Methodology & Details
Formula
The standard dosage of diphenhydramine for dogs is 1 mg per pound of body weight (2.2 mg/kg). For liquid form (12.5 mg / 5 mL), 1 mg equals 0.4 mL.
Important Disclaimer
All veterinary dosage guidelines and calculations are for educational purposes only. Always consult a licensed veterinarian before administering any medication or making major changes to your dog's diet.
How to Calculate Benadryl Dosage: Step-by-Step
Calculate the safe amount of diphenhydramine with these steps:
Determine Dog's Weight
Weigh your dog in pounds or kilograms. If in kg, multiply by 2.2 to get weight in lbs.
Apply the Standard Dose
Multiply the weight in pounds by 1 to get the target dose in milligrams (mg).
Convert to Administered Unit
For 25 mg tablets, divide the dose by 25. For liquid (12.5 mg/5 mL), multiply the dose by 0.4 to get volume in mL.