Our amoxicillin pediatric dosage calculator provides you with a recommended dose of amoxicillin for children, according to their age, weight, and chosen indication.

Anything more? Our pediatric amoxicillin dosage chart allows you to check whether your dosage follows the WHO & American recommendations regarding both the dosage range and the maximum dose possible. 💊

Remember: this tool cannot replace a real medical consultation, and shouldn't be used on its own to make clinical decisions.

What is amoxicillin, and what is it used for?

Amoxicillin is a type of antibiotic, a substance that kills bacteria or prohibits its further growth. It can be used in both in- and outpatients.

Amoxicilline is in use worldwide and nowadays is one of the most favored prescription drugs in the United States, and the most popular antibiotic.

💡 Amoxicillin is usually combined with clavulanic acid - a substance that enhances the bacteria-killing ability of this antibiotic. This way amoxicillin can be used for a wider range of pathogens.

Amoxicillin can treat a variety of bacterial infections: ear, throat, urinary system.

Pediatric amoxicillin dosing is based on weight; the drug itself is usually taken by mouth. 👄

How to use the amoxicillin pediatric dosage calculator?

Our amoxicillin ped dose calculator requires only a few pieces of information - in this section, we'll guide you through all of them step by step.

  1. Your child's Age

    You can give it in months or years. This tool works only for children aged 1 month - 18 years. old 👶

  2. Your child's weight

    Our amoxicillin dose calculator works on various weight units - find the one that best suits your needs.

  3. Enter the strength of amoxicillin

    Our tool works mostly as an amoxicillin suspension pediatric dosage calculator; strength describes how much of amoxicillin can be found in a given volume of suspension an antibiotic. The higher the value, the more substance can be found within 1 ml of the solution. You can choose between following strengths:

    • 125 mg / 5 mL
    • 250 mg / 5 mL
    • 200 mg / 5 mL
    • 400 mg / 5 mL

    E.g., amoxicillin 400mg 5ml dosage for a child means that there's 80 mg of amoxicillin in every milliliter of solution.

  4. Choose the indication:

  • General dosing - for most benign bacterial infections
  • Strep A dosing - for infections caused by a specific type of bacteria: Strep A
  • Endocarditis prophylaxis - is used, for example, in the dentist's office, 60 min before the procedure. You need it for people with immunodeficiencies, artificial heart valves, or other important comorbidities.
  1. Choose the route

    Although you usually take amoxicillin by mouth (oral, PO), it is also possible to administer it intravenously (IV).

  2. You may also use the Check your dosage field below to ensure that everything's ok.

  3. Your results and recommendations are here! 🎉

We used recommendations taken from World Health Organization and American Academy of Pediatric Dentistry.

Are you happy with your results? Try our other pediatrics tools:

How to calculate amoxicillin dosage pediatric?

Amoxicillin dosage for kids is generally based on their weight. To compute the amoxicillin syrup dose for a child, you'll also need to know the amoxicillin solution strength and a given indication.

To obtain the number of mg needed

Use our charts presented below. If the dosage is given as per kg per dose, multiply your child's weight in kilograms (kg) by the recommended amount of amoxicillin.

If the dosage unit is per kg per day, you need to multiply your child's weight by the number of mg of substance and then divide it by the number of doses per day.

To obtain the number of mL needed

Calculated the strength value per 1 ml: divide the milligrams by number of the mL: 400 mg / 5 mL = 80 mg / 1 mL

Divide the number of mg calculated in the previous step by the calculated strength per 1 mL.

E.g., for a child of 10 kg, and the strength of the solution equal to 125 mg/5 mL:

Recommended general dosing: 15 mg/kg/dose => 15 * 10 kg = 150 mg of amoxicillin per dose.

Recalculated strength: 125 mg/ 5 mL = 25 mg/ 1 mL 150 mg/ 25 mg = 6 mL needed.

Amoxicillin dosage for infants over one month is the same as for older children.

Amoxicillin dosage charts by weight

General dosing

Oral (PO) route

  • Maximum dose: 500 mg/dose
  • Daily maximum dose: 4 g/day

Amoxicillin dosage by weight: 15-30 mg/kg/dose

This indication requires 3 doses, taken every 8 hours.

Intravenous (IV) route

  • Maximum dose: 1 mg/dose
  • Daily maximum dose: 4 g/day

Amoxicillin dosage by weight: 30-60 mg/kg/dose

This indication requires 3 doses per day, taken every 8 hours.

Strep A dosing

<15 kg (<33 lb)50 mg/kg/dose
15-29 kg (33-64 lb)750 mg/dose
>30 kg (>66 lb)1000 mg/dose

❗ Be cautious - dosing for children over 15 kg is per dose, not per kilogram per dose. You don't have to multiply it by your child's weight.

This indication requires 1 dose per day, taken for 10 days.

Endocarditis prophylaxis

Amoxicillin dosage by weight: 50 mg/kg/dose

1 dose, administered 30-60 minutes before the procedure.

Maximum per dose: 2 g

Łucja Zaborowska, MD
Recommended dosage
125 mg/5 mL
General dosing
Oral (PO)
Check your dosage
Your dose:
People also viewed…

APGAR score

The APGAR Score calculator will help you assess the health of neonates according to the APGAR scale.

Black Friday

How to get best deals on Black Friday? The struggle is real, let us help you with this Black Friday calculator!


The micronutrient calculator displays the dietary reference intake (DRI) for all elements, according to your age and sex.


The perfect snowman calculator uses math & science rules to help you design the snowman of your dreams!
main background