Benadryl (Diphenhydramine) Dosage Calculator
Health & FitnessEstimate human diphenhydramine (Benadryl) dosing using the standard FDA OTC age-band label and the weight-based 1 mg/kg alternative.
Standard OTC Dose
The standard age-band OTC dose (FDA Drug Facts label).
Maximum Daily Dose (OTC label)
300
The maximum total dose in 24 hours, at up to 6 doses per day.
Weight-Based Dose (alternative)
50.0
An alternative weight-based dose of 1 mg/kg, capped at 50 mg.
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Odeh Ahwal0people find this calculator helpful
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Frequently Asked Questions
How often can Benadryl be given?
Doses are typically spaced 4 to 6 hours apart, no more than 6 times in 24 hours.
Is Benadryl safe under 6?
A doctors advice should be sought before giving diphenhydramine to children under 6 years old.
Is this a substitute for medical advice?
This tool is for educational reference only and is not a substitute for professional medical advice. Always confirm dosing with a doctor or pharmacist before giving or taking any medication.
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