Urine protein-to-creatinine ratio (PCR) mg/mmol → mg/g
Convert urine protein-to-creatinine ratio (pcr) from mg/mmol to mg/g
Sources last checked: 2026-11-03
Urine protein-to-creatinine ratio (PCR) mg/mmol → mg/g
Convert urine protein-to-creatinine ratio (pcr) from mg/mmol to mg/g
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Urine protein-to-creatinine ratio (PCR) mg/mmol → mg/g?
This converter turns a urine protein-to-creatinine ratio (PCR) in mg/mmol, as reported in the UK and by many other SI-based laboratories, into mg/g, the unit 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 mg/mmol PCR alongside mg/g-based guidelines, studies or trial protocols
- Comparing serial values after a change of laboratory
- Expressing a ratio in g/g (mg/g ÷ 1000) for literature that uses that form
When not to use it
- Albumin-to-creatinine ratio values
- Estimating ACR from PCR
- Dipstick protein grades, which are semi-quantitative
How it is calculated
PCR (mg/g) = PCR (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; g/g = mg/g ÷ 1000.
- mg/mmol is numerically identical to g/mol, a form some reports use.
- Transient proteinuria (fever, exercise, orthostatic proteinuria in young people) should be excluded with repeat samples and, where relevant, a first-morning sample.
- Thresholds for nephrotic-range or pregnancy-related proteinuria come from the relevant guideline in its own unit; take them from that source rather than converting from memory.
Frequently asked questions
How do I convert PCR from mg/mmol to mg/g?
Multiply by 8.84. Example: 35 mg/mmol × 8.84 = 309 mg/g; 80 mg/mmol × 8.84 = 707 mg/g.
How do I express the PCR in g/g?
Divide the mg/g result by 1000. For example, 309 mg/g is 0.309 g/g.
Why is the factor 8.84?
It is the number of millimoles in one gram of creatinine: 1000 ÷ 113.12 = 8.84. The protein in the numerator stays in mg; only the creatinine denominator is re-expressed.
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-pcr-mg-mmol-to-mg-g">Urine protein-to-creatinine ratio (PCR) 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.