Urine Albumin Creatinine Ratio (ACR) Calculator
Calculate the Urine Albumin-to-Creatinine Ratio (ACR) using urine albumin and urine creatinine values. Supports multiple laboratory units and provides KDIGO albuminuria category interpretation.
Calculation Result
Formula
Interpretation
| ACR (mg/g) | KDIGO Category |
|---|---|
| <30 | A1 - Normal to mildly increased |
| 30–300 | A2 - Moderately increased |
| >300 | A3 - Severely increased |
Clinical Use
The Urine Albumin-to-Creatinine Ratio (ACR) is an important laboratory marker used to detect and monitor kidney damage. It is commonly used in the evaluation of patients with diabetes, hypertension, and chronic kidney disease.
ACR can be measured from a spot urine sample and helps estimate urinary albumin excretion while accounting for urine concentration.
Frequently Asked Questions
What is ACR?
The Albumin-to-Creatinine Ratio (ACR) measures urine albumin relative to urine creatinine and is an important marker of kidney damage.
What is a normal ACR?
An ACR below 30 mg/g is classified as A1, or normal to mildly increased albuminuria.
What does ACR 30–300 mg/g mean?
An ACR from 30 to 300 mg/g is classified as A2, or moderately increased albuminuria.
What does ACR above 300 mg/g mean?
An ACR above 300 mg/g is classified as A3, or severely increased albuminuria.
Which guideline is used?
The calculator uses the KDIGO albuminuria classification of A1, A2, and A3 categories.
Clinical Applications
- Chronic kidney disease assessment
- Diabetic kidney disease screening
- Hypertension-related kidney disease evaluation
- Monitoring urinary albumin excretion
- Assessment of kidney damage
Disclaimer
This calculator is intended for educational and laboratory reference purposes only. It should not replace professional medical advice, diagnosis, treatment, or institutional protocols. ACR results should be interpreted together with clinical findings and other laboratory investigations.
References
- KDIGO Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease.
- National Kidney Foundation (NKF).
- American Diabetes Association (ADA) Standards of Care.
