Protein-to-Creatinine Ratio Calculator

Health

Calculate protein-to-creatinine ratio (PCR) from urine test results. PCR > 0.2 g/g (or 22 mg/mmol) indicates significant proteinuria. Used to screen for kidney disease and monitor diabetic nephropathy.

Formula

PCR = Urine Protein (mg/dL) ÷ Urine Creatinine (mg/dL)
  • Normal PCR: < 0.2 g/g (< 22 mg/mmol)
  • Abnormal: 0.2-1.0 g/g (mild to moderate proteinuria)
  • Heavy: > 1.0 g/g (nephrotic range)
  • Used to diagnose and monitor diabetic nephropathy, glomerulonephritis
  • PCR is more reliable than single spot urine protein measurements

Example

Inputs
  • Urine Protein (mg/dL): 30
  • Urine Creatinine (mg/dL): 100

Urine protein 30 mg/dL, creatinine 100 mg/dL: PCR = 30 ÷ 100 = 0.3 g/g (abnormal, mild proteinuria).

Frequently asked questions

What's a normal PCR?
Normal: < 0.2 g/g. Higher values indicate protein loss in urine, suggesting possible kidney disease.
When is this test used?
To screen for kidney disease, monitor diabetes complications, and assess glomerular filtration.