Urine Albumin–Creatinine Ratio Calculator
Enter urine albumin and urine creatinine concentrations from the same specimen.
Your urine laboratory units inputs
Both concentrations must belong to the same urine specimen.
Urine laboratory units report
30 mg/g · urine albumin/creatinine
Same-specimen concentration ratio, not a 24-hour excretion estimate
Full result table
| Quantity | Value | Unit |
|---|---|---|
| Albumin normalised | 30 | mg/L |
| Creatinine normalised | 1 | g/L |
| Albumin/creatinine | 30 | mg/g |
| Same ratio | 3.3936 | mg/mmol |
Both concentrations must belong to the same urine specimen. Serum creatinine is not a substitute. A single ratio is not a kidney diagnosis and is not extrapolated into 24-hour albumin excretion.
Let’s work it out.
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How to use Urine Albumin–Creatinine Ratio Calculator
- Enter urine albumin and urine creatinine concentrations from the same specimen.
- Albumin is normalised to milligrams per litre and creatinine to grams per litre.
- The result displays mg/g and mg/mmol using the stated creatinine molar mass.
Worked example
Albumin 30 mg/L and urine creatinine 100 mg/dL (1 g/L) give 30 mg/g, equivalent to 3.3936 mg/mmol.
Formula, accuracy & limitations
Convert urine albumin to mg/L and urine creatinine to g/L. UACR mg/g = albumin mg/L / creatinine g/L. With creatinine molar mass 113.12 g/mol, mg/mmol = mg/g × 0.11312.
Both concentrations must belong to the same urine specimen. Serum creatinine is not a substitute. A single ratio is not a kidney diagnosis and is not extrapolated into 24-hour albumin excretion.
The primary result is rounded to two decimal places. Calculation tables show up to four and supporting metrics up to six. Very small nonzero values use scientific notation. Display rounding is not fed back into the arithmetic.
Official source and method context ↗Use the same urine specimen
Enter urine albumin and urine creatinine concentrations from the same specimen. These are not serum creatinine, total urinary protein or a twenty-four-hour collection amount. The names and units need checking before the ratio can have the intended meaning.
Convert concentration units before division
Albumin is normalised to milligrams per litre and creatinine to grams per litre. Dividing those quantities cancels the litre denominator and leaves milligrams per gram. The worksheet exposes both normalised concentrations so a factor-of-ten or factor-of-thousand unit mistake is easier to spot.
Read the two ratio conventions
The result displays mg/g and mg/mmol using the stated creatinine molar mass. Those conventions describe the same supplied concentrations. Display rounding does not feed back into the calculation, so the alternative unit is derived from the unrounded ratio.
Leave interpretation separate
A single ratio does not establish a diagnosis or replace repeat testing and clinical assessment. The engine applies no automatic medication advice or twenty-four-hour excretion estimate. Its job is the concentration ratio and transparent unit conversion.
Frequently asked questions
Can I use serum creatinine?
This ratio requires urine creatinine concentration from the same urine specimen as the albumin result. Serum values are a different measurement.
Why normalise to mg/L and g/L first?
Dividing those normalised concentrations leaves mg/g. Exposing both quantities makes concentration-unit mistakes easier to identify.
How is mg/mmol obtained?
The conversion uses a creatinine molar mass of 113.12 g/mol: multiply the unrounded mg/g ratio by 0.11312.
Does one ratio diagnose kidney disease?
This page does not apply a diagnosis, medication recommendation or twenty-four-hour excretion estimate. It computes the supplied concentration ratio.
