How Much Amoxicillin for My Child? 2026 Pediatric Dosage Calculator

Weight (kg)	Weight (lbs)	Standard Dose (40 mg/kg/day)	High Dose (80 mg/kg/day)
5 kg	11 lbs	50 mg twice daily	100 mg twice daily
10 kg	22 lbs	100 mg twice daily	200 mg twice daily
15 kg	33 lbs	150 mg twice daily	300 mg twice daily
20 kg	44 lbs	200 mg twice daily	400 mg twice daily
25 kg	55 lbs	250 mg twice daily	500 mg twice daily
30 kg	66 lbs	300 mg twice daily	600 mg twice daily
35 kg	77 lbs	350 mg twice daily	700 mg twice daily
40 kg	88 lbs	400 mg twice daily	800 mg twice daily

❓ Frequently Asked Questions About Amoxicillin for Children

How much amoxicillin should I give my child?

The standard amoxicillin pediatric dose is 20-50 mg per kg of body weight per day, divided into 2-3 doses. For most infections: 40 mg/kg/day divided every 8-12 hours. For strep throat: 50 mg/kg/day once daily (max 1000 mg). Use our calculator above for exact weight-based dosing.

What is the amoxicillin dose for ear infections?

For ear infections (acute otitis media), the recommended dose is 80-90 mg/kg/day divided every 12 hours for 10 days. This higher dose is needed because amoxicillin penetrates the middle ear less effectively. Maximum dose is 2000-3000 mg per day depending on severity.

How do I calculate amoxicillin dose by weight?

Formula: Weight (kg) × Dose (mg/kg) ÷ Number of doses. Example: 15 kg child, standard dose 40 mg/kg/day divided twice daily = 15 × 40 = 600 mg total per day ÷ 2 = 300 mg per dose. Available suspensions: 125 mg/5 mL, 200 mg/5 mL, 250 mg/5 mL, 400 mg/5 mL. Our calculator does this instantly.

What is the maximum amoxicillin dose for children?

Maximum daily dose for children: Standard infections: 1000-2000 mg/day depending on weight. Severe infections: up to 3000 mg/day. For adults, max is 4000 mg/day. Never exceed recommended dosing. Always use weight-based calculation, not age-based, for accurate dosing.

How many days should a child take amoxicillin?

Treatment duration varies by condition: Ear infections: 7-10 days. Strep throat: 10 days (full course is essential to prevent rheumatic fever). Pneumonia: 7-10 days. Sinusitis: 10-14 days. Always complete the full prescribed course, even if symptoms improve.

What are the side effects of amoxicillin in children?

Common side effects: diarrhea, nausea, vomiting, rash. Serious side effects (rare): severe allergic reaction (hives, difficulty breathing), severe diarrhea (C. difficile). If your child develops a rash, contact doctor - could be allergy or non-allergic rash. Probiotics may help prevent diarrhea.

Can I mix amoxicillin with food or juice?

Yes! Amoxicillin can be taken with or without food. Mixing with a small amount of applesauce, yogurt, or juice can help children take it. But give the full mixture immediately - don't save for later. Do not mix with hot liquids. Shake suspension well before each use.

What if I miss a dose of amoxicillin?

If you miss a dose, give it as soon as you remember. But if it's almost time for the next dose, skip the missed dose and continue regular schedule. NEVER double up doses. Complete the full course to prevent antibiotic resistance.

⚠️ CRITICAL MEDICAL DISCLAIMER

NOT MEDICAL ADVICE: This amoxicillin pediatric dosage calculator is for EDUCATIONAL AND INFORMATIONAL PURPOSES ONLY. It does not constitute medical advice and should not replace professional medical judgment. Always consult your pediatrician before giving any medication to your child.

ALLERGY WARNING: Do not give amoxicillin to a child with a known penicillin or cephalosporin allergy. Allergic reactions can be life-threatening.

COMPLETE THE COURSE: Always complete the full prescribed course of antibiotics, even if your child feels better. Stopping early can lead to antibiotic resistance.

EMERGENCY CONTACT: If your child has an allergic reaction (hives, difficulty breathing, swelling of face/lips), call 911 immediately. For suspected overdose, call Poison Control: 1-800-222-1222.

Last Update: March 10, 2026 | Next Review: October 1, 2026