Urine albumin-to-creatinine ratio (ACR) mg/mmol → mg/g
Convert urine albumin-to-creatinine ratio (acr) from mg/mmol to mg/g
Sources last checked: 2026-11-03
Urine albumin-to-creatinine ratio (ACR) mg/mmol → mg/g
Convert urine albumin-to-creatinine ratio (acr) from mg/mmol to mg/g
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Urine albumin-to-creatinine ratio (ACR) mg/mmol → mg/g?
This converter turns a urine albumin-to-creatinine ratio (ACR) in mg/mmol — the SI form used in the UK and by many other European laboratories — into mg/g, the form used in the USA, Turkey and by many laboratories in German-speaking countries. It multiplies by 8.84, the number of millimoles in one gram of creatinine (molar mass 113.12 g/mol).
When to use it
- Reading a UK or SI-based report alongside mg/g-based guidelines or studies
- Comparing serial ACR values after a change of laboratory
- Entering a value into a tool or trial protocol that expects mg/g
When not to use it
- Protein-to-creatinine ratio, which uses the same factor but a different analyte
- Albumin concentration in mg/L without a creatinine denominator
- Estimating PCR from ACR — there is no fixed factor between them
How it is calculated
ACR (mg/g) = ACR (mg/mmol) × 8.84
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- mg/g = mg/mmol × 8.84; whole mg/g are sufficient.
- Some reports write the SI ratio as g/mol, which is numerically identical to mg/mmol; mg/g can also appear as µg/mg.
- Confirm a raised ratio on repeat samples before categorising, since transient increases are common.
- KDIGO lists albuminuria categories in both units; use the column that matches the report rather than converting thresholds by memory.
Frequently asked questions
How do I convert ACR from mg/mmol to mg/g?
Multiply by 8.84. Example: 12 mg/mmol × 8.84 = 106 mg/g; 6.5 mg/mmol × 8.84 = 57 mg/g.
Why is the factor 8.84?
The conversion re-expresses the creatinine denominator in grams instead of millimoles. One gram of creatinine is 8.84 mmol (molar mass 113.12 g/mol); the factor has nothing to do with the dL/L relationship used for many other analytes.
Is mg/mmol the same as g/mol?
Yes. A milligram per millimole equals a gram per mole, so the number is unchanged.
Evidence and guidelines
Have a follow-up question?
Medelix answers clinical questions from current guidelines and studies — every statement with its source.
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<p><a href="https://medelix.ai/en/calculators/urine-acr-mg-mmol-to-mg-g">Urine albumin-to-creatinine ratio (ACR) mg/mmol → mg/g calculator by Medelix</a></p>For healthcare professionals and medical students. These tools support, and do not replace, clinical judgement. Always check results against the original source and your local protocols.