Blood tests and kidneys
Bedside Schwartz eGFR
Estimated kidney function in children from height and creatinine.
For education. Check against your unit's guidance and a second clinician before use.
cm
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Before you use this
- For children aged 1 to 18 with creatinine measured by an enzymatic (IDMS-traceable) method, which most UK labs use.
- Not reliable when creatinine is changing quickly (for example in acute kidney injury), or with very low or high muscle mass.
How this is calculated
- eGFR (mL/min/1.73 m²) = 36.5 × height (cm) ÷ creatinine (µmol/L)
- The same as 0.413 × height (cm) ÷ creatinine (mg/dL).
Sources
Checked by PICUlearn, 21 Sept 2026.