Albumin/Globulin (A/G) Ratio Calculator
The Albumin/Globulin (A/G) Ratio Calculator works out the ratio of albumin to globulin in your blood from total protein and albumin. Globulin = total protein − albumin, and the A/G ratio = albumin ÷ globulin. A normal ratio is roughly 1.1 to 2.5.
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
Formula
Globulin = Total Protein − Albumin; A/G Ratio = Albumin ÷ Globulin
- Total protein is made up of albumin plus globulin, so globulin = total protein − albumin.
- The A/G ratio divides albumin by the calculated globulin.
- A normal A/G ratio is roughly 1.1–2.5; values outside this can point to liver, kidney, immune or nutritional conditions.
- This is a screening estimate — interpret it alongside the full metabolic panel and clinical context.
Example Calculation
Inputs
- Total Protein: 7 g/dL
- Albumin: 4.2 g/dL
With total protein 7.0 g/dL and albumin 4.2 g/dL: globulin = 7.0 − 4.2 = 2.8 g/dL, and the A/G ratio = 4.2 ÷ 2.8 = 1.5, which is normal.
Frequently asked questions
What is the albumin/globulin ratio?
It is the ratio of albumin to globulin in your blood, calculated from total protein and albumin measured in a blood test.
How is globulin calculated?
Globulin is total protein minus albumin, since these two proteins make up most of the total.
What is a normal A/G ratio?
Roughly 1.1 to 2.5, though exact reference ranges vary slightly by laboratory.
What does a low A/G ratio mean?
It can be associated with liver disease, kidney disease, chronic inflammation, or certain immune disorders — your doctor interprets it in context.
What does a high A/G ratio mean?
A high ratio is less common and may relate to low globulin levels; it should be evaluated by a clinician.