What this calculator does
Albumin-to-creatinine ratio (ACR) works out urine albumin relative to creatinine, a standard kidney-damage screening test. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaACR (mg/g) = urine albumin(mg/dL) × 1000 / urine creatinine(mg/dL)
The inputs explained
| Field | What to enter |
|---|---|
| Urine albumin (mg/dL) | A number, measured in mg/dL. Starts at 2. |
| Urine creatinine (mg/dL) | A number, measured in mg/dL. Starts at 100. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with urine albumin
Every other input is held at the calculator’s starting values while urine albumin varies. Select any row to load that scenario into the calculator.
How the answer changes with urine albumin
| Urine albumin (mg/dL) | Albumin-to-creatinine ratio | KDIGO category | Reference bands |
|---|---|---|---|
| 1 | 10 mg/g | A1: normal to mildly increased | A1 under 30 · A2 30-300 · A3 over 300 mg/g |
| 1.5 | 15 mg/g | A1: normal to mildly increased | A1 under 30 · A2 30-300 · A3 over 300 mg/g |
| 2 | 20 mg/g | A1: normal to mildly increased | A1 under 30 · A2 30-300 · A3 over 300 mg/g |
| 3 | 30 mg/g | A2: moderately increased (microalbuminuria) | A1 under 30 · A2 30-300 · A3 over 300 mg/g |
| 4 | 40 mg/g | A2: moderately increased (microalbuminuria) | A1 under 30 · A2 30-300 · A3 over 300 mg/g |
| 6 | 60 mg/g | A2: moderately increased (microalbuminuria) | A1 under 30 · A2 30-300 · A3 over 300 mg/g |