UKMedCalc

For healthcare professionals. Educational tool only — not a medical device. Verify all results against the current BNF, NICE guidance and local policy, and apply clinical judgement.

RenalPaediatrics

eGFR — Revised Schwartz (bedside, paediatric)

Estimates GFR in children aged 1–16 years from height and serum creatinine (revised 'bedside' Schwartz equation, 2009).

cm

Use a height measured as close as possible to the creatinine sample

Steady-state value only — eGFR is unreliable in acute kidney injury

Enter the required values to see the result.

Formula

eGFR=0.413×height (cm)SCr  (mg/dL)\text{eGFR} = \frac{0.413 \times \text{height (cm)}}{S_{Cr} \; (\text{mg/dL})}

Serum creatinine in mg/dL (divide µmol/L by 88.4 — handled automatically). The constant 0.413 assumes an enzymatic, IDMS-traceable creatinine assay. Full multivariable versions incorporating cystatin C and BUN were published in the same paper.

Caveats & limitations

  • Validated in children aged 1–16 years with chronic kidney disease; not validated in neonates, healthy children, or acute kidney injury.
  • Less accurate at extremes of muscle mass (e.g. spina bifida, muscular dystrophy) — consider cystatin C.
  • Do not use adult equations (CKD-EPI, Cockcroft–Gault) in young children.

Evidence & UK guidance

Primary evidence

  • Schwartz GJ, Muñoz A, Schneider MF, et al. New equations to estimate GFR in children with CKD. J Am Soc Nephrol. 2009;20(3):629–637.

    PubMedDOI

UK practice

The standard bedside eGFR equation for children in UK paediatric practice. Use enzymatic/IDMS-traceable creatinine; cystatin C–based equations are preferred where available, particularly when muscle mass is atypical.

Official resources

Formula and citations last verified: 2026-08-03

Related calculators

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BSA

Calculates body surface area using the Mosteller equation (UK standard) with the Du Bois equation for comparison.