Spot urine protein (or albumin) to creatinine ratio

Estimates 24-hour protein excretion and KDIGO albuminuria category.

Previewv0.1.0 · Pending clinical review

Inputs

1 of 3

Measured

Urine albumin or protein

Urine creatinine

When to use

Pearls and pitfalls

Albumin: A1 below 30 mg/g, A2 30–300, A3 above 300.
Protein above 3,500 mg/day: nephrotic range. Preeclampsia: protein ratio 0.3 mg/mg or higher.

Why use

Replaces most 24-hour collections.

Ratio (mg/g) = urine protein (mg/dL) ÷ urine creatinine (mg/dL) × 1000 ≈ mg/day