Urine ACR Unit Converter

Convert ACR from mg/g to mg/mmol

To convert urine albumin-to-creatinine ratio from mg/g to mg/mmol, multiply the ACR value by 0.113.

For example, an ACR result of 30 mg/g multiplied by 0.113 equals approximately 3.39 mg/mmol.

• ACR mg/mmol = ACR mg/g × 0.113
• 10 mg/g = approximately 1.13 mg/mmol
• 30 mg/g = approximately 3.39 mg/mmol
• 100 mg/g = approximately 11.30 mg/mmol
• 300 mg/g = approximately 33.90 mg/mmol
• 1000 mg/g = approximately 113.00 mg/mmol

Convert ACR from mg/mmol to mg/g

To convert urine ACR from mg/mmol to mg/g, divide the mg/mmol value by 0.113.

This is equivalent to multiplying by approximately 8.85. The calculator uses the reciprocal of 0.113 so that conversion in both directions remains consistent.

• ACR mg/g = ACR mg/mmol ÷ 0.113
• 1 mg/mmol = approximately 8.85 mg/g
• 3 mg/mmol = approximately 26.55 mg/g
• 10 mg/mmol = approximately 88.50 mg/g
• 30 mg/mmol = approximately 265.49 mg/g
• 100 mg/mmol = approximately 884.96 mg/g

Equivalent Urine ACR Units

Several ACR reporting formats use different mass prefixes while representing the same ratio. Recognizing these equivalents helps prevent unnecessary calculation errors.

• 1 mg/g creatinine equals 1 µg/mg creatinine.
• 1 mg/mmol creatinine equals 1 g/mol creatinine.
• 1000 mg/g creatinine equals 1 g/g creatinine.
• 1000 mg/g creatinine equals 1 mg/mg creatinine.
• 1 mg/g creatinine equals 1000 µg/g creatinine.
• The analyte remains urine albumin and the denominator remains urine creatinine in every supported unit.

ACR Unit Converter versus ACR Calculator

An ACR unit converter and an ACR calculator perform different operations. This page converts a complete ACR result that has already been calculated by a laboratory or another validated calculator.

An ACR calculator starts with separate urine albumin and urine creatinine concentrations and calculates their ratio after reconciling the input units.

• Use this converter when the report already provides an ACR result.
• Use the separate ACR/PCR calculator when urine albumin and urine creatinine are provided as separate values.
• Do not enter a urine albumin concentration alone as an ACR value.
• Do not enter a urine creatinine concentration alone as an ACR value.
• Always check whether the report shows ACR, PCR, urine albumin, or total urine protein.

How Urine Albumin-to-Creatinine Ratio Is Calculated

Urine ACR compares the amount of albumin in a urine sample with the amount of creatinine in the same sample. Expressing albumin relative to creatinine helps account for differences in urine concentration.

When urine albumin is expressed in mg/L and urine creatinine is expressed in g/L, dividing albumin by creatinine produces ACR in mg/g. When albumin is expressed in mg/L and creatinine in mmol/L, the result is expressed in mg/mmol.

• ACR mg/g = urine albumin mg/L ÷ urine creatinine g/L
• ACR mg/mmol = urine albumin mg/L ÷ urine creatinine mmol/L
• Both measurements should come from the same urine specimen.
• Raw urine albumin and creatinine units must be checked before calculating the ratio.

ACR, PCR, and Urine Albumin Are Different Results

ACR measures urine albumin relative to urine creatinine. PCR measures total urine protein relative to urine creatinine. A standalone urine albumin result measures albumin concentration without using creatinine as the denominator.

These results are related but are not interchangeable. A mathematical unit conversion does not convert total protein into albumin or convert PCR into ACR.

• ACR means albumin-to-creatinine ratio.
• uACR means urine albumin-to-creatinine ratio.
• PCR or uPCR means urine protein-to-creatinine ratio.
• Urine albumin concentration may be reported in mg/L without being an ACR.
• The older expression microalbumin refers to a small amount of albumin, not a different albumin molecule.

ACR Categories and Rounded Guideline Thresholds

Kidney disease guidelines commonly describe albuminuria using A1, A2, and A3 categories. These category thresholds are usually presented as rounded equivalents rather than exact mathematical conversions.

For example, 30 mg/g converts mathematically to approximately 3.39 mg/mmol, although guideline tables commonly display 30 mg/g alongside 3 mg/mmol for practical classification.

• A1 is commonly shown as less than 30 mg/g or less than 3 mg/mmol.
• A2 is commonly shown as 30–300 mg/g or 3–30 mg/mmol.
• A3 is commonly shown as greater than 300 mg/g or greater than 30 mg/mmol.
• Do not use exact unit conversion alone to override the category shown by the laboratory or applicable guideline.
• Clinical assessment also considers eGFR, persistence of albuminuria, medical history, and other markers of kidney damage.

Clinical Context and Important Limitations

A single elevated urine ACR result does not by itself establish chronic kidney disease. Persistence over time and the complete clinical context are important.

Urine ACR can vary between samples. The performing laboratory and healthcare professional may recommend confirmation using another specimen, often a first-morning urine sample when appropriate.

• Use the analyte name and unit printed on the original laboratory report.
• Use the reference and interpretation supplied by the performing laboratory.
• Temporary changes may occur with strenuous exercise, infection, fever, menstruation, marked hyperglycemia, or urinary tract inflammation.
• Do not convert a PCR result and label it as ACR.
• Do not use this unit converter alone to diagnose diabetic kidney disease or chronic kidney disease.
• Do not make treatment decisions from a converted value alone.

Common ACR Conversion Examples

The following examples show equivalent urine albumin-to-creatinine ratio values. Results are rounded for display.

• 10 mg/g = approximately 1.13 mg/mmol
• 30 mg/g = approximately 3.39 mg/mmol
• 100 mg/g = approximately 11.30 mg/mmol
• 300 mg/g = approximately 33.90 mg/mmol
• 3 mg/mmol = approximately 26.55 mg/g
• 30 mg/mmol = approximately 265.49 mg/g
• 30 mg/g = 30 µg/mg
• 1000 mg/g = 1 g/g = 1 mg/mg

Frequently Asked Questions

How do I convert ACR mg/g to mg/mmol? Multiply the mg/g value by 0.113.

How do I convert ACR mg/mmol to mg/g? Divide the mg/mmol value by 0.113.

Is ACR µg/mg the same as mg/g? Yes. These units are numerically equivalent.

Is ACR g/mol the same as mg/mmol? Yes. These ratio units are numerically equivalent.

Why does 30 mg/g convert to 3.39 mg/mmol while guidelines sometimes show 3 mg/mmol? Guideline category limits are commonly rounded for practical clinical use.

Is microalbumin creatinine ratio the same as urine ACR? The older expression usually refers to urine albumin-to-creatinine ratio; albumin is the analyte being measured.

Can this converter calculate ACR from albumin and creatinine? No. Use the separate ACR/PCR calculator when the two laboratory concentrations are provided separately.

Can this converter change PCR into ACR? No. PCR measures total protein, whereas ACR measures albumin.

References and Conversion Standards

1. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease.
2. National Institute of Diabetes and Digestive and Kidney Diseases. Assess Urine Albumin.
3. National Kidney Foundation. Urine Albumin-Creatinine Ratio.
4. Weaver RG, et al. Estimating Urine Albumin-to-Creatinine Ratio from Protein-to-Creatinine Ratio. Journal of the American Society of Nephrology.