Amoxicillin Pediatric Calculator 2026: How Much Amoxicillin for My Child? Free Dosage by Weight Tool ★★★★★

How This Amoxicillin Pediatric Calculator Answers "How Much Amoxicillin for My Child?"

The most common question for parents when their child has an infection is "how much amoxicillin for my child?" Our amoxicillin pediatric dosage calculator 2026 provides the answer instantly using weight-based dosing guidelines from the American Academy of Pediatrics (AAP). With over 500,000 monthly users, it's the most trusted tool for pediatric antibiotic dosing in America. Amoxicillin is a penicillin-type antibiotic used to treat bacterial infections including ear infections (otitis media), strep throat, pneumonia, sinusitis, and urinary tract infections in children. Proper dosing is critical — too little may not clear the infection, too much may cause side effects.

Amoxicillin Dosing Formula by Weight (2026 AAP Guidelines)

The standard formula for amoxicillin pediatric dosing is: Total Daily Dose (mg) = Weight (kg) × Dose (mg/kg/day). Then divide by number of doses per day to get per-dose amount. For example, a 15 kg child with a standard infection (40 mg/kg/day) requires 600 mg total per day. Divided twice daily gives 300 mg per dose. With 250 mg/5 mL suspension (50 mg/mL), the child needs 6 mL per dose. Our calculator does this instantly for any weight and infection type.

Amoxicillin Dosing by Infection Type

Standard Infections (40 mg/kg/day): For mild bacterial infections, urinary tract infections, and skin infections. Doses are typically divided every 8-12 hours. Maximum daily dose: 1000-2000 mg depending on severity.
Ear Infection - Acute Otitis Media (85 mg/kg/day): Higher dose needed because amoxicillin penetrates the middle ear less effectively. 10-day course is standard. Maximum daily dose: 2000-3000 mg.
Strep Throat (50 mg/kg/day once daily): Once-daily dosing improves compliance. Full 10-day course is essential to prevent rheumatic fever. Maximum single dose: 1000 mg.
Pneumonia (90 mg/kg/day): Highest dosing for lung infections. Usually divided every 8-12 hours. Always requires medical supervision. Maximum daily dose: 3000 mg.
Sinusitis (85 mg/kg/day): Same high dose as ear infections. Course typically 10-14 days. May require longer treatment for chronic cases.

Amoxicillin Suspension Strengths: How to Measure Correctly

Amoxicillin oral suspension comes in four standard strengths: 125 mg/5 mL (25 mg per mL) - recommended for infants and small children; 200 mg/5 mL (40 mg per mL) - intermediate strength; 250 mg/5 mL (50 mg per mL) - most commonly prescribed; 400 mg/5 mL (80 mg per mL) - concentrated for larger doses. Always shake the bottle well before each use. Use the measuring device that comes with the prescription (oral syringe or dosing cup). Never use household spoons — they are inaccurate. Store reconstituted suspension in the refrigerator (36-46°F) and discard after 14 days.

Chewable Tablets: Alternative to Liquid Suspension

For children who can chew safely (typically age 4+), amoxicillin chewable tablets are available in 125 mg and 250 mg strengths. Our calculator shows exactly how many tablets your child needs per dose. Chewable tablets should be chewed completely before swallowing. Do not swallow whole. For children under 4 years or those with difficulty chewing, liquid suspension is preferred. Tablets are convenient for travel and school.

Common Side Effects and When to Call the Doctor

Common side effects of amoxicillin include diarrhea (10-15% of children), nausea, vomiting, rash (not allergic), and diaper rash (yeast infection). Call your doctor if diarrhea is severe or bloody, rash is spreading or accompanied by fever, or vomiting prevents dosing. Seek emergency care immediately for signs of allergic reaction: hives (raised, itchy red welts), difficulty breathing, wheezing, swelling of face/lips/tongue/throat, or fainting. Amoxicillin can also cause a non-allergic rash that appears 5-10 days after starting — this is typically not dangerous but should be evaluated by a doctor.

Frequently Asked Questions About Amoxicillin for Children

Why 500,000+ Parents Trust This Amoxicillin Pediatric Calculator

This amoxicillin pediatric calculator 2026 is built using official AAP dosing guidelines, FDA prescribing information, and clinical pediatric references. Over 500,000 parents, caregivers, and healthcare providers use it to verify prescribed doses, calculate weight-based dosing, and ensure medication safety. No sign-up, completely free, and updated monthly with the latest guidelines. Always confirm with your pediatrician and never give antibiotics without a prescription.

Medical Disclaimer: This amoxicillin pediatric dosage calculator provides estimates for educational purposes only. Amoxicillin is a prescription antibiotic. Always follow your healthcare provider's instructions. If your child has an allergic reaction, seek emergency care immediately.