Medication Dosage Calculator

Easily determine the right dose of Acetaminophen (Tylenol), Ibuprofen (Motrin, Advil), or Diphenhydramine (Benadryl) for your child’s weight.

Important Instructions

Always read and follow the label instructions.
Whenever possible, use the dosing device that came with the product. Syringes and droppers are more accurate than teaspoons.
If you use a teaspoon, it should be a measuring spoon. Regular spoons are not reliable.

Weight (lbs):

For infants under 6 pounds, check with your doctor.

Child's Weight	Medication	Dose
6-11 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	1.25 mL
12-17 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	2.5 mL
12-17 lbs	Ibuprofen Infant Drops 50 mg/1.25 mL (such as Infant’s Motrin Oral Suspension Drops)	1.25 mL
12-17 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	2.5 mL
18-23 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	3.75 mL
18-23 lbs	Ibuprofen Infant Drops 50 mg/1.25 mL (such as Infant’s Motrin Oral Suspension Drops)	1.875 mL
18-23 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	4 mL
24-35 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	5 mL
24-35 lbs	Chewable Acetaminophen Tablets 160 mg (such as Children’s Tylenol Chewable Tablets)	1 tablet
24-35 lbs	Ibuprofen Infant Drops 50 mg/1.25 mL (such as Infant’s Motrin Oral Suspension Drops)	2.5 mL
24-35 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	5 mL
36-47 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	7.5 mL
36-47 lbs	Chewable Acetaminophen Tablets 160 mg (such as Children’s Tylenol Chewable Tablets)	1.5 tablets
36-47 lbs	Ibuprofen Infant Drops 50 mg/1.25 mL (such as Infant’s Motrin Oral Suspension Drops)	3.75 mL
36-47 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	7.5 mL
48-59 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	10 mL
48-59 lbs	Chewable Acetaminophen Tablets 160 mg (such as Children’s Tylenol Chewable Tablets)	2 tablets
48-59 lbs	Adult Acetaminophen Tablets 325 mg (such as Tylenol Regular Strength)	1 tablet
48-59 lbs	Ibuprofen Infant Drops 50 mg/1.25 mL (such as Infant’s Motrin Oral Suspension Drops)	5 mL
48-59 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	10 mL
48-59 lbs	Chewable Ibuprofen Tablets 100 mg (such as Children’s Motrin Chewables)	2 tablets
48-59 lbs	Adult Ibuprofen Tablets 200 mg (such as Motrin IB or Advil)	1 tablet
60-71 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	12.5 mL
60-71 lbs	Chewable Acetaminophen Tablets 160 mg (such as Children’s Tylenol Chewable Tablets)	2.5 tablets
60-71 lbs	Adult Acetaminophen Tablets 325 mg (such as Tylenol Regular Strength)	1 tablet
60-71 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	12.5 mL
60-71 lbs	Chewable Ibuprofen Tablets 100 mg (such as Children’s Motrin Chewables)	2.5 tablets
60-71 lbs	Adult Ibuprofen Tablets 200 mg (such as Motrin IB or Advil)	1 tablet
72-95 lbs	Acetaminophen Syrup 160 mg/5mL (such as Children’s Tylenol Oral Suspension)	15 mL
72-95 lbs	Chewable Acetaminophen Tablets 160 mg (such as Children’s Tylenol Chewable Tablets)	3 tablets
72-95 lbs	Adult Acetaminophen Tablets 325 mg (such as Tylenol Regular Strength)	1.5 tablets
72-95 lbs	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	15 mL
72-95 lbs	Chewable Ibuprofen Tablets 100 mg (such as Children’s Motrin Chewables)	3 tablets
72-95 lbs	Adult Ibuprofen Tablets 200 mg (such as Motrin IB or Advil)	1.5 tablets
96 lbs or more	Adult Acetaminophen Tablets 325 mg (such as Tylenol Regular Strength)	2 tablets
96 lbs or more	Ibuprofen Liquid 100 mg/5 mL (such as Children’s Motrin Oral Suspension)	20 mL
96 lbs or more	Chewable Ibuprofen Tablets 100 mg (such as Children’s Motrin Chewables)	4 tablets
96 lbs or more	Adult Ibuprofen Tablets 200 mg (such as Motrin IB or Advil)	2 tablets
0-19 lbs	Diphenhydramine Liquid 12.5mg/5mL (such as Children's Benadryl Allergy Liquid)	For children under 20 lbs, consult your doctor. Check your latest well child handout for dosing guidelines.
20-24 lbs	Diphenhydramine Liquid 12.5mg/5mL (such as Children's Benadryl Allergy Liquid)	4 mL
25-37 lbs	Diphenhydramine Liquid 12.5mg/5mL (such as Children's Benadryl Allergy Liquid)	5 mL
38-49 lbs	Diphenhydramine Liquid 12.5mg/5mL (such as Children's Benadryl Allergy Liquid)	7.5 mL
50-99 lbs	Diphenhydramine Liquid 12.5mg/5mL (such as Children's Benadryl Allergy Liquid)	10 mL
25-37 lbs	Diphenhydramine Chewables 12.5mg (such as Children's Benadryl Chewables)	1 tablet
38-49 lbs	Diphenhydramine Chewables 12.5mg (such as Children's Benadryl Chewables)	1.5 tablets
50-99 lbs	Diphenhydramine Chewables 12.5mg (such as Children's Benadryl Chewables)	2 tablets
100 lbs or more	Diphenhydramine Chewables 12.5mg (such as Children's Benadryl Chewables)	4 tablets
25-49 lbs	Diphenhydramine Tablets 25mg (such as Benadryl Allergy Tablets)	1/2 tablet
50-99 lbs	Diphenhydramine Tablets 25mg (such as Benadryl Allergy Tablets)	1 tablet
100 lbs or more	Diphenhydramine Tablets 25mg (such as Benadryl Allergy Tablets)	2 tablets
50-99 lbs	Diphenhydramine Capsules 25mg (such as Benadryl Allergy Capsules or Liqui-Gels)	1 capsule
100 lbs or more	Diphenhydramine Capsules 25mg (such as Benadryl Allergy Capsules or Liqui-Gels)	2 capsules

Acetaminophen (Tylenol)

Do not give before 2 months of age. Call us immediately if your baby under 2 months old has a fever.
Repeat dose every 4-6 hours while symptoms last.
Do not give more than 5 doses in 24 hours.
Do not use with any other product containing acetaminophen.
Source: HealthyChildren.org

Ibuprofen (Advil, Motrin)

Not for use with children under 6 months of age, unless advised by your pediatrician.
Repeat dose every 6-8 hours as needed.
Do not give more than 4 doses in 24 hours.
Source: HealthyChildren.org

Diphenhydramine (Benadryl)

When recommended by a provider, Benadryl may be used safely in young children.
Non-sedating alternatives (eg, loratadine, cetirizine, fexofenadine) are available over-the-counter. Please ask a healthcare provider before using these medications in children under 2 years of age.
Repeat dose every 6 hours as needed.
Children’s Benadryl Fastmelts: Each fastmelt tablet contains the equivalent of 12.5 mg of Diphenhydramine HCL, dosed the same as chewable tablets.
Risk of side effects: May cause drowsiness and paradoxical excitatory. Use caution when driving or operating heavy machinery after dosing due to potential for sedation and decreased alertness. This is especially relevant for teen drivers.
Source: HealthyChildren.org

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