Pediatric Anesthesia Dose Calculator

Estimate doses, fluid maintenance, and airway sizes accurately. Edit entries, compare volumes, and visualize outputs. Designed for careful pediatric perioperative planning with clear summaries.

Clinical safety note: This tool is for education, checking, and local workflow support. Pediatric anesthetic drug doses vary by indication, route, comorbidity, and institutional policy. Always verify every entry against your hospital formulary, current references, and clinician judgment before use.

Calculator Inputs

Patient Profile

Working Weight Logic

Estimation formulas apply to infants and children up to 12 years. Actual measured weight is preferred whenever available.

Built-In Outputs

  • Estimated weight reference
  • Maintenance fluid rate
  • Cuffed and uncuffed ETT sizes
  • Oral ETT depth by age and weight
  • Tidal volume range at 6–8 mL/kg
  • User-entered medication doses and volumes

Medication Row 1

Medication Row 2

Medication Row 3

Medication Row 4

Medication Row 5

Medication Row 6

Example Data Table

This example shows demonstration inputs only. Replace every value with your local protocol and patient-specific data before clinical use.

Field Example Value Purpose
Age 5 years Supports weight estimate and airway sizing.
Actual weight 18.4 kg Preferred working weight when measured.
Medication row 1 Analgesic, 1 mcg/kg, 50 mcg/mL Demonstrates a bolus calculation.
Medication row 2 Induction agent, 2 mg/kg, 10 mg/mL Shows dose-to-volume conversion.
Medication row 3 Infusion, 0.1 mcg/kg/min, 4 mcg/mL Shows pump-rate style output.

Formula Used

Weight and fluid formulas

  • Estimated weight under 1 year: (0.5 × age in months) + 4
  • Estimated weight 1–5 years: (2 × age in years) + 8
  • Estimated weight 6–12 years: (3 × age in years) + 7
  • Maintenance fluid: 4 mL/kg/hr for first 10 kg, 2 mL/kg/hr for next 10 kg, 1 mL/kg/hr above 20 kg

Airway and dose formulas

  • Cuffed ETT size: (age ÷ 4) + 3.5
  • Uncuffed ETT size: (age ÷ 4) + 4
  • Oral ETT depth by age: neonate 10 cm, 1 year 11 cm, 2 years 12 cm, then (age ÷ 2) + 12
  • Oral ETT depth by weight: (weight ÷ 5) + 12
  • Tidal volume range: 6–8 mL/kg
  • Bolus dose: working weight × dose per kg
  • Infusion rate: working weight × rate per kg
  • Volume: total mass ÷ entered concentration

How to Use This Calculator

  1. Enter the patient age and measured weight. Keep actual weight selected when it is available.
  2. If a measured weight is unavailable, switch to estimated weight and enter age carefully.
  3. Complete only the medication rows you need. Use your approved local dose and concentration values.
  4. Add maximum caps where your protocol requires a total dose limit.
  5. Submit the form to display results below the header and above the form.
  6. Review fluid, airway, tidal volume, and medication output values together.
  7. Use the CSV or PDF buttons to document or share the checked result sheet.
  8. Before administration, independently verify every dose, unit, concentration, and route.

FAQs

1) Can this calculator replace a pediatric formulary?

No. It only performs arithmetic from the values you enter. Final dosing still requires local protocols, current references, indication-specific guidance, and clinician review.

2) Why does the tool prefer actual weight?

Measured weight reduces estimation error. Age-based formulas are useful when scales are unavailable, but they are only fallback methods and should not override reliable measured data.

3) What happens if I add a maximum dose?

The calculator caps the computed total at your entered limit and marks that row as capped. This helps prevent arithmetic overshoot when protocols define a maximum.

4) Can I use the medication rows for infusions?

Yes. Choose an infusion unit, enter the approved rate per kilogram, and add the prepared concentration. The result table will show the calculated mass rate and volume rate.

5) Why are some volume cells blank?

Volume needs a concentration entry. If concentration is missing or zero, the tool still calculates mass output but leaves the volume field blank.

6) Are airway sizes exact recommendations?

No. They are standard formula references only. Airway anatomy, cuff choice, equipment design, and clinical conditions can change the final size decision.

7) What is shown in the Plotly graph?

The chart displays calculated medication volumes in milliliters for completed rows that include concentrations. It helps compare draw-up or pump-volume requirements quickly.

8) Can this file run as a single page?

Yes. Save it as one server-side file, place it on your site, and open it through your web server so the form can process submissions.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.