ACR & PCR Calculator
Albumin-to-creatinine and protein-to-creatinine ratios with instant interpretation.
Last updated on: August 17, 2025
Enter values
What are ACR and PCR?
ACR = albumin (mg/L) ÷ creatinine (g/L) → mg/g; or albumin (mg/L) ÷ creatinine (mmol/L) → mg/mmol.
PCR = protein (mg/L) ÷ creatinine (g/L) → mg/g; or protein (mg/L) ÷ creatinine (mmol/L) → mg/mmol. Conversions: mg/g = mg/mmol × 8.84; mg/mmol = mg/g × 0.113.
Why it matters
- Detects and stages albuminuria/proteinuria in CKD.
- Guides risk stratification and follow-up.
- Supports screening in diabetes, hypertension, and CKD care.
Interpretation (adults)
ACR A1 — Normal to mildly increased:
<30 mg/g (<3 mg/mmol).
ACR A2 — Moderately increased:
30–300 mg/g (3–30 mg/mmol).
ACR A3 — Severely increased:
≥300 mg/g (>30 mg/mmol).
PCR — Normal to mildly increased:
<150 mg/g (<15 mg/mmol).
PCR — Moderately increased:
150–500 mg/g (15–50 mg/mmol).
PCR — Severely increased:
≥500 mg/g (>50 mg/mmol).
Quick unit harmonization
The calculator accepts common lab units and converts automatically.
- mg/dL → mg/L: ×10
- Creatinine mg/dL → g/L: ×0.01
- µmol/L → mmol/L: ÷1000
- µg/mL = mg/L
- Creatinine MW ≈ 113.12 mg/mmol
- ACR/PCR: mg/g = mg/mmol × 8.84; mg/mmol = mg/g × 0.113
This page has been medically reviewed by Dr. Khoulah Attia – PharmD, Immunology Specialist.