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Blood Test Tracker

Urine albumin to creatinine ratio (UACR) calculator

Compares albumin, a protein, with creatinine in a urine sample to show whether your kidneys are letting protein leak into urine. Type your results in the units on your report and it works out uACR as you type, in your browser.

AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03Kidneys

Type your results above, or fill in the example, to see uACR.

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Educational information, not medical advice. Blood Test Tracker doesn’t diagnose or treat, and it doesn’t replace your clinician. Talk with your clinician before changing medications, supplements or care.

How it’s worked out

The formula

uACR (mg/g) = urine albumin (mg/L) ÷ urine creatinine (g/L), which is the same as urine albumin (mg/dL) ÷ urine creatinine (mg/dL) × 1000. For mg/mmol: urine albumin (mg/L) ÷ urine creatinine (mmol/L).

A worked example

Example numbers, not anyone’s real results, run through the same code as the calculator above.

Example inputs and the result
Urine Albumin10 mg/L
Urine Creatinine100 mg/dL
uACR10.0 mg/g

For an adult, this result is in the usual range, and in the target zone.

What uACR tells you

Albumin is a protein that healthy kidneys keep in your blood. Creatinine is a waste product your kidneys release into urine at a fairly steady rate. The lab measures both in the same urine sample and divides albumin by creatinine. This corrects for how dilute or concentrated your urine is, so one spot sample works well. A higher ratio means more albumin is leaking into your urine.

Albumin in the urine can be an early sign of kidney damage, even when eGFR is still in the usual range. It is also linked to a higher chance of heart and blood vessel problems. KDIGO sorts the result into three categories (A1 to A3) and combines it with eGFR to describe kidney health. One result is rarely enough, since exercise, fever and infection can raise it for a short time.

Read the full page on uACR, with what a high or low result can mean.

Usual ranges

The ranges the result above is placed on. Your own lab’s printed range comes first if it gives one.

Sources

The equation

  1. Albumin/Creatinine Ratio, Random Urine (test 140285), Labcorp
  2. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease, Kidney International 105(4S):S117-S314 (2024)
5 more sources for the ranges and the explanation
  1. Estimated Glomerular Filtration Rate, Albuminuria, and Adverse Outcomes: An Individual-Participant Data Meta-Analysis, JAMA (CKD Prognosis Consortium) (2023)
  2. Albumin-Creatinine Ratio, Urine (test 0050203), ARUP Laboratories
  3. A_CR - Albumin/Creatinine Ratio, Mayo Clinic Laboratories
  4. Urine Albumin-Creatinine Ratio (uACR), National Kidney Foundation
  5. Creatinine (PubChem compound 588), NCBI PubChem

AI-verified against cited sources. Awaiting expert review. Last reviewed 2026-10-03. The calculator is version 1.0.0 of our code for this equation, tested against published examples. How we build and check these pages.

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