Albumin-to-Creatinine Ratio (ACR) Calculator

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The albumin concentration in a random or first-morning urine sample. Typical reference range in a spot urine is <2 mg/dL (or <20 mg/L).
The creatinine concentration in the same urine sample. Typical spot urine creatinine is 20-300 mg/dL in adults.
Some guidelines note that women tend to have slightly lower muscle mass and therefore lower urine creatinine, which can affect interpretation at borderline ACR values. KDIGO 2024 uses sex-neutral thresholds.
ACR (mg/g)A2 - Moderately increased
150mg/g

Milligrams of albumin per gram of creatinine

ACR (mg/mmol)16.97mg/mmol
KDIGO Albuminuria CategoryA2 - Moderately increased
Stage descriptionMildly elevated albuminuria; increased CKD risk; confirm with repeat test
150 mg/g
A1 - Normal<30A2 - Moderate30-300A3 - Severe300+

Your ACR is 150.0 mg/g - moderately elevated (A2).

  • Your ACR of 150.0 mg/g falls in the A2 (moderately increased) category. This means your kidneys are leaking a little more albumin than expected.
  • A single elevated result should be confirmed with a repeat test on a different day, since fever, vigorous exercise, and dehydration can temporarily raise ACR.
  • Persistent A2 albuminuria is a recognised risk factor for progression to CKD and cardiovascular disease.

Next stepRepeat the urine test on a separate day using a first-morning sample. If the result remains elevated, discuss CKD risk management with your doctor.

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