Pediatric calculators
Browse pediatric bedside calculators and dosing tools, including maintenance fluids, BSA, QTc, anion gap, and vital signs.
Open the formula you need, get the number, then use the interpretation notes when the bedside context is messier than the math.
Most used calculators
Start with the calculators opened most often for bedside checks, dose math, and quick pediatric interpretation.
Maintenance fluid calculator
Run 4-2-1 and daily maintenance fluid math with practical deficit-versus-maintenance guardrails.
VitalsPediatric vital signs chart
Check age-based heart rate, respiratory rate, and blood pressure ranges without leaving the hub.
NewbornNewborn bilirubin calculator
Open the AAP 2022 bilirubin workflow for age-in-hours thresholds and jaundice decision support.
NewbornBilirubin 2004 vs 2022
Compare the old AAP bilirubin risk-zone workflow with current 2022 thresholds, risk factors, and follow-up logic.
NewbornNewborn bilirubin nomogram
Understand Bhutani risk zones, age-in-hours interpretation, and when to use AAP 2022 treatment thresholds.
GrowthPediatric BMI calculator
Calculate BMI quickly and move to percentile context when age- and sex-based interpretation matters.
EDPECARN calculator
Use the pediatric head-injury pathway when CT-versus-observation decisions need structure.
GrowthAdjusted age calculator
Convert chronological age to corrected age for preterm growth and milestone interpretation.
NeonatalGestational age calculator
Derive preterm PMA, corrected age, due date, LMP, and day of life from known dates.
GrowthFenton growth chart
Choose Fenton 2025 or 2013, prepare preterm PMA, and hand off to official chart tools.
GrowthFenton 2013 vs 2025
Compare Fenton chart versions, when to use each, and how to document chart transitions.
GrowthFenton 2013 growth calculator
Prepare preterm PMA and measurements before Fenton 2013 percentile and z-score handoff.
GrowthFenton 2025 growth calculator
Prepare preterm PMA and measurements before official Fenton 2025 percentile and z-score handoff.
GrowthOlsen 2010 growth calculator
Prepare preterm PMA and measurements before Olsen 2010 percentile and z-score handoff.
GrowthOlsen 2015 BMI calculator
Calculate preterm BMI before Olsen 2015 percentile and z-score handoff.
GrowthCDC growth calculator 0 to 36 months
Calculate CDC infant chart percentiles for weight, length, and head circumference.
GrowthCDC growth calculator 2 to 20 years
Calculate CDC child and teen percentiles for weight, stature, BMI, and weight-for-stature.
GrowthWHO growth calculator 0 to 24 months
Calculate WHO infant percentiles for weight, length, head circumference, BMI, and weight-for-length.
Common pediatric calculator shortcuts
Keep common bedside chart, fluid, growth, renal, and emergency calculations close to the main calculator hub.
Open age-based heart rate, respiratory rate, and blood pressure ranges when the question is bedside chart lookup.
Run daily and hourly Holliday-Segar maintenance fluid math with 4-2-1 context.
Estimate a child’s midparental target height and keep the growth workflow close to the calculator hub.
Calculate bedside Schwartz eGFR from height and creatinine when renal function context matters.
Use the pediatric head-injury pathway when CT-versus-observation decisions need structure.
Start with the tool you need
These are the fastest paths for common dose checks, bedside formulas, and pediatric decision support.
- Pediatric dose calculator
- Antibiotic dosing calculator
- OTC dosing charts
- Centor score for strep pharyngitis (McIsaac)
- mg/kg to mL dose conversion
- Body surface area (BSA) calculator
- QTc calculator
- Steroid conversion calculator
- IV maintenance fluids calculator
- IV infusion rate calculator
- IV drip rate calculator
- Pediatric vital signs
- Normal infant vital signs by age
- Pediatric respiratory rate chart by age
- Pediatric blood pressure chart by age
- Glucose infusion rate (GIR)
- Anion gap calculator
- Kocher criteria calculator
- Apgar score calculator
Open a formula fast
Use these when the question is narrow and the answer should be one calculator away.
Get Mosteller BSA quickly, then compare Haycock or Du Bois if your protocol uses a different formula.
Correct QT fast, then sanity-check Bazett versus Fridericia when the heart rate is pushing the result around.
Convert prednisone, hydrocortisone, methylprednisolone, and dexamethasone equivalents before checking the clinical protocol.
Open the daily and hourly maintenance formulas with one worked example and clear deficit-versus-maintenance guardrails.
Check age-based normal ranges fast when you need a bedside chart instead of a calculation.
Calculate the gap quickly and keep the surrounding chemistry tools close by.
Convert GIR math into a practical bedside check without stopping to unpack the acronym first.
How to Use These Calculators
- Verify units (kg, cm, and age in months/years) before calculating.
- Use the most recent vitals and labs; re-check if values are borderline.
- Interpret outputs in context with clinical status, local protocols, and supervising guidance.
Rapid calculator workflow
- Choose one calculator that matches the immediate clinical question and validated age range.
- Verify units, source values, and measurement timing before calculation.
- Pair the result with trajectory, exam findings, and protocol context.
- Set explicit reassessment timing and escalation triggers before disposition.
- Document inputs, output, and decision rationale for handoff continuity.
What You'll Find Here
A curated set of growth, renal, ED, neonatal, and disease-specific scoring tools with quick access to pediatric dosing and decision thresholds.
How to use calculators
- Start with the right units, then verify age, weight, and clinical context against your local policy.
- Pair each numeric result with a practical action plan, monitoring window, and escalation trigger.
- Use repeat entries to confirm trend direction before major care changes when possible.
Quality and maintenance
Calculator outputs are updated as references and logic are refreshed. Medication content is maintained against trusted pediatric dosing guidance, while utility math is validated through existing unit tests and review checks.
Common safety reminders
- Do not use bedside calculators as the only basis for high-risk decisions.
- Recalculate with corrected inputs after major physiological changes (dehydration, feeding change, new symptoms).
- Document decision logic and follow-up timing for handoff clarity and quality auditing.
Escalation triggers that override a reassuring output
- Clinical deterioration despite reassuring calculated output.
- Conflicting or low-confidence input data that could materially alter result.
- High-risk decisions (transfer/admission/critical meds) dependent on uncertain output.
- Lack of reliable follow-up context for borderline-risk patients.
Calculator categories
Categories are grouped to reduce friction, including growth/percentiles, renal/physiology, ED workflows, and neonatal care. The index links also include disease-specific tools for quick access during acute presentations.
References
Frequently Asked Questions
No. These calculators support structured bedside workflows, but results should always be interpreted with the full clinical picture, local policy, and escalation pathways.
The tools are designed to help with pediatric decision support and education. Always confirm critical thresholds and red flags with your treatment setting before making medication, transfer, or admission decisions.
Core formulas and safety ranges are reviewed on a schedule and aligned to widely used pediatric references; each calculator page includes citation-backed context where thresholds or classifications are used.
Escalate based on clinical concern and use calculator output as one input only. Document the discrepancy and trigger protocol-based reassessment.
Handoff template
- Calculator used and validated age/context applicability.
- Input values with timestamp/source and unit verification status.
- Output interpretation with supporting bedside context.
- Action taken and immediate reassessment interval.
- Escalation trigger and ownership for next decision point.
Browse by category:
- Bilirubin (AAP 2022) calculator
- Bilirubin 2004 vs 2022 guidelines
- Newborn bilirubin nomogram guide
- BMI calculator
- IV maintenance fluids (Holliday–Segar, 4–2–1)
- IV infusion rate calculator (mcg/kg/min ↔ mL/hr)
- IV drip rate calculator (gtt/min ↔ mL/hr)
- Dehydration in children (CDS + ORS)
- Antiemetic dosing calculator hub
- Antihistamine dosing calculator hub
- Pediatric eGFR (Schwartz 2009)
- Anion Gap Calculator
- Corrected Sodium (Hyperglycemia)
- QTc Calculator (Bazett & Fridericia)
- PaO2/FiO2 (P/F) Ratio
- Oxygenation Index (OI)
- Pediatric Vital Signs
- Body Surface Area (BSA)
- Pediatric Shock Index (SIPA)
- Pediatric Fever Thresholds
- Steroid Conversion Calculator
- Pediatric Blood Volume
- Pediatric Transfusion Volume
- Westley Croup Score
- Pediatric Asthma Score (PAS)
- Bronchiolitis Score Comparison
- Bronchiolitis score calculators hub
- Bronchiolitis Severity (Wang Score)
- RDAI bronchiolitis score calculator
- Bronchiolitis Severity Bands (Mild/Moderate/Severe)
- Pediatric Appendicitis Score (PAS)
- Kocher Criteria (Septic Arthritis)
- Pediatric Glasgow Coma Scale (pGCS)
- PECARN Pediatric Head Injury
- Pediatric Trauma Score (PTS)
- Pediatric Burn TBSA (Lund-Browder)
- Bedside PEWS (Pediatric Early Warning Score)
- Modified PEWS (mPEWS)
- Yale Observation Scale (YOS)
- BRUE (AAP 2016) — Lower-Risk Criteria
- Strep Pharyngitis — Centor/McIsaac Score
- Attia Pediatric Pharyngitis Predictor
- Children's Bacterial Meningitis Score (BMS)
- Kawasaki Disease — Classic Criteria
- Pediatric SIRS (PSIRS)
- Jones Criteria (Acute Rheumatic Fever)
- sPCDAI — Short Pediatric Crohn’s Index
- PUCAI — Pediatric Ulcerative Colitis Activity Index
- PELD Score
- Apgar Score
- Silverman-Anderson Score
- Downes' Respiratory Distress Score
- New Ballard score calculator
- Neonatal Hypoglycemia Thresholds
- Finnegan NAS Score
- Eat, Sleep, Console (ESC)
- Neonatal EOS Risk Factors
- CRIES — Neonatal Pain Scale
- FLACC — Pediatric Pain Scale
- Thompson HIE Score
- Infant Formula Feeding Calculator
- BIND / BIND‑M — Neonatal ABE Score
- Glucose Infusion Rate (GIR)
- Adjusted (Corrected) Age for Preterm
- Gestational Age Calculator for Preterm Infants
- Fenton Growth Chart
- Fenton 2013 vs 2025 Growth Charts
- Fenton 2013 Growth Calculator
- Fenton 2025 Growth Calculator
- Olsen 2010 Growth Calculator
- Olsen 2015 BMI Calculator
- CDC Growth Calculator 0 to 36 Months
- CDC Growth Calculator 2 to 20 Years
- WHO Growth Calculator 0 to 24 Months
- Mid‑Parental Height (Target Height)
- BMI Percentile (CDC/WHO)
- Height Percentile
- Weight Percentile
- Head Circumference Percentile
- Breast Pump Flange Size