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Pediatric Dosing Calculators & Medication Guides

Fast pediatric dosing math support for clinicians and caregivers. Always confirm medication choices, doses, and timing with a qualified clinician or pharmacist.

Enter the patient weight in the selected unit.

Select the unit used for the patient weight.

Type to search, or pick from your visible list.

Select the strength of Acetaminophen

Select how many doses are prescribed per day.

Select the prescribed course length in days.

Select the dosage amount in mg/kg/day.

  • Under 2 years: ask a doctor (US label). Any fever under 12 weeks needs medical evaluation before dosing.
  • Newborns under 1 month: only as a clinician directs; term newborns max 60 mg/kg/day, preterm infants lower (about 40 mg/kg/day).
  • Do not give more than 5 doses in 24 hours (label). Count acetaminophen in cold/flu and prescription combination products.
  • Check the bottle: US infant and children's liquids are both 160 mg/5 mL; drops sold outside the US (100 mg/mL) are about 3 times stronger.

By using the "Calculate Dose" button on pedscalc.com, you acknowledge and agree that while our calculations aim for accuracy, final prescription responsibility lies solely with you, the healthcare provider. pedscalc.com and its operators are not liable for any errors or omissions, or for the results obtained from the use of this information. Always verify calculations and exercise professional judgment.

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Children's fever and allergy medicine dosage charts

Label and AAP dosing charts for the medicines parents give most, with the mL for each bottle.

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Our Supported Medications

Below is a detailed list of pediatric medications currently supported by our pediatric dosing tools. Each entry gives a brief overview of the drug and its primary uses.

🌡️ Acetaminophen
Acetaminophen (paracetamol) is an analgesic and antipyretic widely used in pediatrics for fever and mild to moderate pain. When dosed by weight and within recommended limits, it is safe and effective. Standard pediatric oral liquid concentration is 160 mg/5 mL.
💊 Ibuprofen
Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used for fever and mild to moderate pain in children. Use the pediatric dose calculator to convert weight-based (mg/kg) dosing into mL for common strengths like 100 mg/5 mL.
🤧 Diphenhydramine
Diphenhydramine (Benadryl) is a first-generation antihistamine used for short-term allergic symptoms such as itching and hives. Use this route for parent-friendly allergy caution guidance, sedation warnings, chart support, and links to lower-drowsiness alternatives.
🌬️ Prednisolone
Prednisolone is an oral corticosteroid used for asthma flares, croup, and allergic inflammation. Use the pediatric dose calculator to convert weight-based (mg/kg) bursts and the 15 mg/5 mL syrup into mL per dose.
🧫 Clindamycin
Clindamycin is a lincosamide antibiotic used in children for skin and soft-tissue infections, including MRSA coverage in some regions, and as an alternative for penicillin-allergic patients. Typical pediatric dosing is 20–40 mg/kg/day divided every 6–8 hours.
🤢 Ondansetron
Ondansetron (Zofran) helps control nausea and vomiting in children. Use this page to calculate a pediatric Zofran dose, choose the matching liquid or ODT option, and pair the dose with a practical oral rehydration plan.
🌲 Dexamethasone
Dexamethasone treats croup and asthma exacerbations in children. Use the pediatric dose calculator to convert weight-based dosing (often 0.6 mg/kg for croup) into mL or tablet doses.
🦠 Oseltamivir
Oseltamivir (Tamiflu) is used for pediatric influenza treatment and selected prevention plans. Use the Tamiflu pediatric dosing calculator to convert weight-based dosing into exact mL for the 6 mg/mL suspension or into the right capsule strength.
🤧 Cetirizine
Cetirizine (Zyrtec) pediatric dose by age from the FDA label: 2.5 mg once daily from 6 months (prescriber-directed under 2 years), up to 5 mg a day at 2 to 5 years, and 5 or 10 mg once daily from 6 years, with mL for 1 mg/mL liquid.
🌼 Loratadine
Loratadine (Claritin) pediatric dose by age from the FDA label: 5 mg once daily at 2 to under 6 years and 10 mg once daily from 6 years, with mL for 5 mg/5 mL liquid. Under 2 years, ask a doctor.
🌬️ Fexofenadine
Fexofenadine (Allegra) is a low-sedating second-generation antihistamine for seasonal allergies and hives in children. Use this route for parent-friendly allergy guidance on formulations, water-versus-juice rules, chart support, and medication-specific dosing detail when needed.
🧫 Penicillin VK
Penicillin VK (phenoxymethylpenicillin) is a time‑tested narrow‑spectrum penicillin used in children for streptococcal pharyngitis and other susceptible infections, dosed by weight as an oral suspension.
🧪 Cefpodoxime
Cefpodoxime proxetil is an oral third‑generation cephalosporin used in pediatrics as an alternative for acute otitis media and sinusitis, with weight-based dosing for 50 or 100 mg/5 mL suspension strengths.
🧫 Cefuroxime
Cefuroxime is a second-generation cephalosporin antibiotic used in pediatrics for select respiratory, sinus, ear, and skin infections. Use the pediatric dose calculator to convert mg/kg dosing into mL of oral suspension (suspension and tablets are not bioequivalent, so do not convert mg-for-mg) and remember that oral cefuroxime axetil is best taken with food.
🧫 Cefprozil
Cefprozil is a second-generation cephalosporin used in pediatrics for select ENT and respiratory infections based on clinical judgment and local patterns.
🧫 Cefixime
Cefixime is an oral third-generation cephalosporin used selectively in pediatrics. Use this route when the main question is turning a prescribed cefixime syrup plan into the right mL dose, especially for common 100 mg/5 mL Suprax-style suspension workflows.
🧫 Cefaclor
Cefaclor is a second-generation cephalosporin used selectively for pediatric infections based on susceptibility and guidelines.
🧫 Cefadroxil
Cefadroxil is a first-generation cephalosporin used in pediatrics for select skin and soft tissue infections and other indications when appropriate.
🧪 Ampicillin
Ampicillin is an aminopenicillin antibiotic used selectively in pediatrics. Use the pediatric dose calculator to convert weight-based (mg/kg) dosing into oral suspension or capsule doses.
🧪 Dicloxacillin
Dicloxacillin is a penicillinase‑resistant penicillin used for infections due to methicillin‑susceptible Staphylococcus aureus (MSSA).
🌼 Chlorpheniramine
Chlorpheniramine (chlorphenamine) is a first-generation antihistamine used in children for allergy symptoms. Use the pediatric dose calculator to check age- and weight-matched dosing, then watch carefully for drowsiness, age restrictions, and duplicate cold-medicine ingredients.
🍃 Brompheniramine
Brompheniramine is a first‑generation H1 antihistamine used for allergy symptoms in children; it can cause drowsiness and anticholinergic effects.
🍽️ Cyproheptadine
Cyproheptadine is a first‑generation antihistamine with antiserotonergic properties; in pediatrics it is used for allergy symptoms and sometimes for appetite stimulation per clinician direction.
🌿 Levocetirizine
Levocetirizine (Xyzal) pediatric dose by age from the FDA label, once daily in the evening: 1.25 mg at 6 months to 5 years, 2.5 mg at 6 to 11 years, 5 mg from 12 years, with mL for 0.5 mg/mL liquid.
🫗 Omeprazole
Omeprazole is a proton pump inhibitor (PPI) used in children for GERD and erosive esophagitis. Use the pediatric dose calculator to estimate omeprazole mg/kg dosing, convert to a practical formulation, and plan pre-meal timing.
🍽️ Lansoprazole
Lansoprazole is a proton pump inhibitor (PPI) used once daily in children for GERD and erosive esophagitis; give before meals.
🥣 Pantoprazole
Pantoprazole is a proton pump inhibitor used in pediatrics for GERD and erosive esophagitis; give before meals.
🥞 Esomeprazole
Esomeprazole is a PPI used once daily in children for GERD and erosive esophagitis; give before meals.
🧪 Cimetidine
Cimetidine is an H2 receptor antagonist used in children for reflux symptoms; typically dosed 2–4 times daily. It has more drug interaction potential than other H2 blockers.
🧴 Nizatidine
Nizatidine is an H2 receptor antagonist used twice daily for reflux symptoms; fewer interactions than cimetidine.
😴 Hydroxyzine
Hydroxyzine is an antihistamine used for itching, hives, and selected anxiety-related situations in children. Use the pediatric dose calculator by weight to turn mg/kg dosing into exact mL for the common 10 mg/5 mL liquid or into tablet doses while planning around sedation.
🦠 Amoxicillin
Amoxicillin is a common pediatric antibiotic for ear infections, strep throat, sinusitis, and pneumonia. Use the pediatric amoxicillin dose calculator by weight to convert mg/kg/day plans into exact mL for common suspension strengths such as 400 mg/5 mL, including high-dose otitis media dosing.
🌡️ Cefdinir
Cefdinir is a third-generation cephalosporin used for otitis media, pharyngitis, sinusitis, and skin infections. The pediatric dose calculator converts weight-based (mg/kg) dosing into mL per dose for common suspension strengths.
🌡️ Keflex
Cephalexin (Keflex) treats common pediatric skin, urinary, and strep infections. The pediatric dose calculator translates mg/kg dosing into exact mL or tablet schedules for the product in hand.
🦠 Biaxin
Biaxin, or Clarithromycin, is an antibiotic useful for treating a variety of bacterial infections, including bronchitis and pneumonia. Especially useful in treating infections in the middle ear, sinus, skin, and throat, its specific dosing options in the calculator make pediatric care streamlined and effective.
🤢 Pepcid
Pepcid (famotidine) reduces stomach acid for reflux and ulcer symptoms in infants and children. Use the pediatric dose calculator to estimate weight-based (mg/kg) dosing and match common liquid strengths like 40 mg/5 mL.
🦠 Azithromycin
Azithromycin (Zithromax, Z-Pak) treats respiratory and other bacterial infections. Use the pediatric dose calculator to compute weight-based (mg/kg) dosing for 3- or 5-day courses and match common suspension strengths like 100 mg/5 mL or 200 mg/5 mL.
🦠 Augmentin
Augmentin (amoxicillin-clavulanate) treats common pediatric bacterial infections such as sinusitis, pneumonia, and otitis media. Use the pediatric dose calculator to convert amoxicillin-based mg/kg/day dosing into mL for common suspension strengths including Augmentin 228, 457, 400/57, and ES-600.
🍄 Griseofulvin (Micro Sized)
Griseofulvin is an antifungal medication used to treat fungal infections of the skin, hair, and nails such as jock itch, athlete's foot, and barber's itch. The micro-sized formulation allows for better absorption and effectiveness. With various dosing options available in the calculator, it facilitates accurate pediatric dosing.
🦠 Sulfamethoxazole - Trimethoprim
Bactrim (sulfamethoxazole-trimethoprim, TMP-SMX, co-trimoxazole, Septra) treats UTIs, skin infections, and other bacterial illnesses. The Bactrim pediatric dose calculator converts weight-based TMP-SMX dosing based on the trimethoprim component into practical doses.
💊 Erythromycin (EES)
Macrolide antibiotic used for pertussis, neonatal chlamydial infections, and atypical pneumonias when newer agents are not suitable.
💊 Metronidazole
Metronidazole treats anaerobic infections and giardiasis. Use the pediatric dose calculator to convert mg/kg dosing into mL per dose. Check your bottle: 250 mg/5 mL is usually compounded; the FDA-approved liquid is 500 mg/5 mL.
💊 Nitrofurantoin
Nitrofurantoin is a urinary antiseptic used for uncomplicated lower UTIs and prophylaxis in children who can concentrate urine effectively.
💊 Acyclovir
Acyclovir is an antiviral used for HSV infections and selected pediatric varicella treatment plans. Use this route when the main question is converting an acyclovir prescription into the right mL for the common 200 mg/5 mL suspension while keeping the frequent daily schedule straight.
💊 Doxycycline
Doxycycline is a tetracycline antibiotic used for atypical pneumonia, tick-borne infections, acne, and other pediatric indications when benefits outweigh age-based staining risks. This page supports doxycycline pediatric dose calculator workflows by weight while keeping indication-specific dosing checks visible.
💊 Naproxen
Naproxen is a nonsteroidal anti-inflammatory drug used in children for pain and inflammation when longer dosing intervals are preferred.
💊 Fluconazole
Fluconazole is an azole antifungal for candidiasis and prophylaxis in immunocompromised children. The pediatric dose calculator converts weight-based (mg/kg) dosing into daily oral regimens.
💊 Ceftibuten
Ceftibuten is an oral third-generation cephalosporin for selected pediatric respiratory or urinary infections when susceptibility and follow-up planning support its use.
💊 Prednisone
Prednisone is a systemic corticosteroid used for pediatric inflammatory, allergic, and immune-mediated conditions requiring short tapers or chronic control. If the prescription says prednisolone 15 mg/5 mL liquid, use the prednisolone pediatric dose calculator instead.
💊 Dimenhydrinate
Dimenhydrinate is an antihistamine used in children for motion sickness and selected nausea plans. Use the pediatric dose calculator to match child dosing to the trip schedule and common liquid or chewable forms.
💊 Elemental Iron
Elemental iron supplements treat and prevent iron deficiency anemia; dosing is weight-based and often paired with vitamin C to enhance absorption.
💊 Sucralfate
Sucralfate forms a protective barrier on gastrointestinal ulcers and erosions, supporting healing while limiting systemic absorption.
💊 Minocycline
Minocycline is a tetracycline-class antibiotic used for acne and resistant infections when first-line options are unsuitable.
💊 Terbinafine
Systemic allylamine antifungal used once daily for tinea capitis, onychomycosis, and other dermatophyte infections in children.
💊 Albendazole
Albendazole is a benzimidazole anthelmintic used to treat intestinal nematodes and tissue cestode infections in children.
💊 Valacyclovir
Valacyclovir is the prodrug of acyclovir, offering higher exposure with fewer daily doses for HSV suppression and targeted varicella therapy in older children.
💊 Tinidazole
Tinidazole is a nitroimidazole antimicrobial that provides convenient single-dose therapy for giardiasis and trichomoniasis in children.
💊 Pyrantel Pamoate (base)
Pyrantel pamoate is an OTC depolarizing anthelmintic that paralyzes pinworms so they pass in stool.
💊 Propranolol
Propranolol is a non-selective beta blocker used for pediatric arrhythmias, migraines, hyperthyroidism symptoms, and infantile hemangioma.
💊 Nitazoxanide
Nitazoxanide is a thiazolide antimicrobial that treats protozoal diarrhea such as cryptosporidiosis and giardiasis in children.
💊 Ivermectin
Ivermectin is an oral antiparasitic (3 mg tablets) FDA-approved for intestinal strongyloidiasis and onchocerciasis, and used per CDC guidance for scabies, cutaneous larva migrans, and off-label head lice in children weighing 15 kg or more.
💊 Indomethacin
Indomethacin is a potent NSAID used for PDA closure, rheumatologic flares, and specific inflammatory conditions under specialist guidance.
💊 Hydrochlorothiazide
Hydrochlorothiazide is a thiazide diuretic used for hypertension and edema in children able to maintain electrolyte balance.
💊 Bethanechol
Bethanechol is a cholinergic agonist used to improve bladder emptying in children with non-obstructive urinary retention.
💊 Clonidine
Clonidine is an alpha-2 agonist used in pediatrics for hypertension, ADHD adjunct, sleep dysregulation, and withdrawal management.

Calculators

Explore our bilirubin, BMI, and full suite of pediatric calculators.

🍼 Bilirubin (AAP 2022) Calculator
Neonatal jaundice helper: age-at-sample, TSB/TcB with mg/dL↔µmol/L conversion, GA buckets, and risk factors.
🍼 Bilirubin 2004 vs 2022 Guidelines
Compare AAP bilirubin guideline changes in risk grouping, thresholds, TcB confirmation, escalation, and follow-up.
🍼 Newborn Bilirubin Nomogram Guide
Understand Bhutani risk-zone language, age-in-hours bilirubin interpretation, and current AAP 2022 threshold workflow.
🧮 BMI Calculator
Calculate body mass index and review BMI ranges.
💧 IV Maintenance Fluids (Holliday–Segar, 4–2–1)
Estimate maintenance IV fluid rates using classic pediatric 4–2–1 and Holliday–Segar methods.
💧 IV Infusion Rate (mcg/kg/min ↔ mL/hr)
Convert mcg/kg/min to mL/hr, mL/hr to mcg/kg/min, and mg/hr ↔ mL/hr using concentration.
🩺 IV Drip Rate (gtt/min ↔ mL/hr)
Convert IV drip rates with drop factor and estimate time-to-infuse.
🥤 Dehydration in Children (CDS + ORS)
Assess dehydration severity and plan oral/IV rehydration with pediatric-specific guidance.
🧪 Pediatric eGFR (Schwartz 2009)
Estimate glomerular filtration rate in children using updated Schwartz coefficients.
🧪 Anion Gap Calculator
Compute anion gap with or without potassium using Na, Cl, and bicarbonate values.
🧂 Corrected Sodium (Hyperglycemia)
Adjust sodium for hyperglycemia using 1.6 or 2.4 correction factors.
💓 QTc Calculator (Bazett & Fridericia)
Calculate corrected QT interval using heart rate or RR interval.
🫁 PaO2/FiO2 (P/F) Ratio
Compute P/F ratio from PaO2 and FiO2 with ARDS banding notes.
🫁 Oxygenation Index (OI)
Calculate oxygenation index to help gauge the severity of respiratory failure.
📈 Pediatric Vital Signs
Check age-based normal ranges for heart rate, respiratory rate, and blood pressure.
📐 Body Surface Area (BSA)
Calculate BSA with the Mosteller formula using height and weight.
⚡ Pediatric Shock Index (SIPA)
Calculate age-adjusted shock index using heart rate and systolic BP cutoffs.
🌡️ Pediatric Fever Thresholds
Check age-based fever and high fever thresholds with guidance.
💊 Steroid Conversion
Convert approximate glucocorticoid equivalent doses across prednisone, hydrocortisone, dexamethasone, and related steroids.
🩸 Pediatric Blood Volume
Estimate total blood volume using weight and age-based assumptions.
💉 Pediatric Transfusion Volume
Estimate packed RBC transfusion volume to reach a target hemoglobin.
🌬️ Westley Croup Score
Score croup severity and review typical treatment thresholds.
🫁 Pediatric Asthma Score (PAS)
Assess asthma exacerbation severity using age-adjusted PAS cut points.
🫁 Bronchiolitis Severity (Wang Score)
Score bronchiolitis severity with the Wang Respiratory Score (0-12).
🫁 Bronchiolitis RDAI
Score wheeze and retractions with the RDAI bronchiolitis scale (0-17).
🫁 Bronchiolitis Severity Bands
Classify bronchiolitis as mild, moderate, or severe using key clinical domains.
🩻 Pediatric Appendicitis Score (PAS)
Estimate the likelihood of appendicitis based on PAS criteria.
🦴 Kocher Criteria (Septic Arthritis)
Use Kocher predictors to estimate risk of septic arthritis of the hip.
🧠 Pediatric Glasgow Coma Scale (pGCS)
Score pediatric consciousness using age-appropriate GCS modifiers.
🧠 PECARN Pediatric Head Injury
Stratify pediatric blunt head trauma risk with PECARN criteria.
🚑 Pediatric Trauma Score (PTS)
Score pediatric trauma severity using weight, airway, BP, CNS, fractures, and wounds.
🔥 Pediatric Burn TBSA (Lund-Browder)
Estimate pediatric burn TBSA with age-adjusted Lund-Browder percentages.
🚨 Bedside PEWS (Pediatric Early Warning Score)
Calculate Bedside PEWS using age-based vital sign ranges and exam findings.
🚨 Modified PEWS (mPEWS)
Score mPEWS with age-specific vitals, oxygenation, LOC, and PMH factors.
👶 Yale Observation Scale (YOS)
Quantify illness severity in febrile infants using the YOS.
⚠️ BRUE (AAP 2016) — Lower-Risk Criteria
Apply AAP BRUE criteria to identify lower-risk infants after concerning events.
🧫 Strep Pharyngitis — Centor/McIsaac Score
Estimate the probability of group A strep in children with sore throat.
🧫 Attia Pediatric Pharyngitis Predictor
Use Attia clinical criteria to refine strep testing decisions.
🧬 Children's Bacterial Meningitis Score (BMS)
Estimate risk of bacterial meningitis in children with CSF pleocytosis.
❤️ Kawasaki Disease — Classic Criteria
Review diagnostic criteria and incomplete Kawasaki disease red flags.
🔥 Pediatric SIRS (PSIRS)
Apply pediatric SIRS criteria with age-adjusted vital sign cutoffs.
🫀 Jones Criteria (Acute Rheumatic Fever)
Evaluate major and minor Jones criteria for rheumatic fever.
🧻 sPCDAI — Short Pediatric Crohn's Index
Track Crohn’s disease activity in children using the short PCDAI.
🧻 PUCAI — Pediatric Ulcerative Colitis Activity Index
Quantify UC disease activity for pediatric patients using PUCAI.
🧫 PELD Score
Calculate Pediatric End-Stage Liver Disease (PELD) score for transplant priority.
👶 Apgar Score
Score newborn appearance, pulse, grimace, activity, and respiration (0-10).
🫁 Silverman-Anderson Score
Grade neonatal respiratory distress using five bedside findings (0-10).
🫁 Downes' Respiratory Distress Score
Score neonatal respiratory distress using cyanosis, retractions, grunting, air entry, and RR.
👶 New Ballard Score
Estimate gestational age from New Ballard maturity scores.
🩸 Neonatal Hypoglycemia Thresholds
Check neonatal glucose thresholds by age with AAP or PES guidance.
🍼 Finnegan NAS Score
Score neonatal abstinence symptoms using the Modified Finnegan tool.
🍼 Eat, Sleep, Console (ESC)
Assess neonatal abstinence with eat/sleep/console criteria.
🧫 Neonatal EOS Risk Factors
Checklist of early-onset sepsis risk factors based on CDC GBS guidance.
😢 CRIES — Neonatal Pain Scale
Score postoperative pain in neonates using CRIES behavioral cues.
😣 FLACC — Pediatric Pain Scale
Assess pain in young children using the FLACC observational scale.
🧠 Thompson HIE Score
Stage hypoxic–ischemic encephalopathy severity using Thompson scoring.
🍼 Infant Formula Feeding Calculator
Plan daily formula volume based on age, weight, and feeding goals.
🧠 BIND / BIND‑M — Neonatal ABE Score
Score acute bilirubin encephalopathy severity using BIND/BIND‑M.
💉 Glucose Infusion Rate (GIR)
Convert infusion rate and dextrose concentration into GIR (mg/kg/min).
📏 Adjusted (Corrected) Age for Preterm
Convert chronological age and gestational age into corrected age for preterm infants.
📅 Gestational Age for Preterm
Derive EDD, LMP, PMA, corrected age, day of life, and preterm classification.
📈 Fenton Growth Chart
Choose Fenton 2025 or 2013, prepare PMA and measurements, and hand off to official chart tools.
📈 Fenton 2013 vs 2025
Compare Fenton chart versions, when to use each, and how to document chart transitions.
📈 Olsen 2010 Growth Calculator
Prepare preterm PMA and measurements for Olsen 2010 chart percentile and z-score handoff.
📊 Olsen 2015 BMI Calculator
Calculate preterm BMI and prepare Olsen 2015 chart percentile and z-score handoff.
📈 CDC Growth 0–36 Months
Calculate CDC infant chart percentiles for weight, length, and head circumference.
📈 CDC Growth 2–20 Years
Calculate CDC child and teen percentiles for weight, stature, BMI, and weight-for-stature.
📈 WHO Growth 0–24 Months
Calculate WHO infant percentiles for weight, length, head circumference, BMI, and weight-for-length.
📏 Mid‑Parental Height (Target Height)
Estimate target adult height from parental heights and sex.
📊 BMI Percentile (CDC/WHO)
Calculate BMI z-scores and percentiles using CDC/WHO LMS growth data.
📊 Height Percentile
Plot child height against CDC/WHO reference percentiles by age and sex.
📊 Weight Percentile
Plot child weight against CDC/WHO reference percentiles by age and sex.
📊 Head Circumference Percentile
Track head circumference against standard growth curves in infancy.
🍼 Breast Pump Flange Size
Estimate optimal pump flange size from nipple measurements.