basic

Paediatric Fluid Deficit Calculator

Deficit = body weight × % dehydration × 10 mL.

Estimate the fluid deficit (in mL) of a dehydrated child from body weight and clinical dehydration severity: deficit = weight (kg) × % dehydration × 10. Add this to the daily maintenance fluid requirement.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

kg
%

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Deficit (mL) = weight (kg) · % dehydration · 10

In depth

Estimate the fluid deficit (in mL) of a dehydrated child from body weight and clinical dehydration severity: deficit = weight (kg) × % dehydration × 10. Add this to the daily maintenance fluid requirement.