Benadryl Dosage Calculator for Dogs / How Much Benadryl to Give A Dog

How Much Benadryl to Give A Dog Calculator

Enter the dog's weight in pounds (lbs).
Enter the concentration of each Benadryl tablet in milligrams (mg).
Select the dog's condition to calculate the dosage, or leave it blank for general use.

This how much benadryl to give a dog calculator help ensure safe and effective administration of Diphenhydramine for your puppy.

The standard recommended dosage is typically 1 mg per pound of body weight, administered 2-3 times daily.

If your dog weighs 25 pounds, the calculation would be:

  • 25 pounds × 1 mg = 25 mg of Benadryl per dose

Benadryl Dosage for Dogs Chart

Dog’s Weight (lbs)Benadryl Dosage (mg)Dosage in mlDose Frequency
55 mg2 mlEvery 8-12 hours
1010 mg4 mlEvery 8-12 hours
1515 mg6 mlEvery 8-12 hours
2020 mg8 mlEvery 8-12 hours
3030 mg12 mlEvery 8-12 hours
4040 mg16 mlEvery 8-12 hours
5050 mg20 mlEvery 8-12 hours
6060 mg24 mlEvery 8-12 hours
7070 mg28 mlEvery 8-12 hours
8080 mg32 mlEvery 8-12 hours
9090 mg36 mlEvery 8-12 hours
100100 mg40 mlEvery 8-12 hours

How Much Benadryl to Give A Dog Formula

The formula for Benadryl dosage calculator follows this structure:

Dog's weight (in pounds) × 1 mg = Required Benadryl dose

For a 30-pound dog:

  • Calculate base dose: 30 lbs × 1 mg = 30 mg
  • Consider frequency: Every 8-12 hours (2-3 times daily)
  • Maximum daily dose: 30 mg × 3 = 90 mg total per day

How to Measure Benadryl Dosage for Dogs?

Here are detailed steps:

  • Tablet form measurement:
    • Standard tablets (25 mg)
    • Children’s tablets (12.5 mg)
    • Use a pill splitter for precise divisions
  • Liquid form measurement:
    • Use a proper measuring syringe
    • Check concentration (usually 12.5 mg/5 ml)
    • Calculate required volume

If using children’s liquid Benadryl (12.5 mg/5 ml) for a 15-pound dog:

Required dose: 15 mg

Volume needed: (15 mg × 5 ml) ÷ 12.5 mg = 6 ml

How much Benadryl to give a 50 lb dog?

For a 50-pound dog, the dosage calculation would be:

  • Base dose: 50 lbs × 1 mg = 50 mg per dose
  • Using 25 mg tablets: Give 2 tablets per dose
  • Using liquid (12.5 mg/5 ml): 20 ml per dose
  • Maximum daily amount: 150 mg (50 mg × 3 doses)

How much Benadryl to give an 80 lb dog?

For an 80-pound dog, the calculation yields:

  • Base dose: 80 lbs × 1 mg = 80 mg per dose
  • Using 25 mg tablets: Give 3 whole tablets + 1 split tablet (5 mg) per dose
  • Using liquid (12.5 mg/5 ml): 32 ml per dose
  • Maximum daily amount: 240 mg (80 mg × 3 doses)

References:

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