Albumin to globulin (A/G) ratio calculator
A calculated comparison of two groups of blood proteins, albumin and globulins. It is one clue about the liver, kidneys and immune system. Type your results in the units on your report and it works out A/G ratio as you type, in your browser.
AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03Liver
Type your results above, or fill in the example, to see A/G ratio.
Nothing you type here leaves your browser.
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
A/G ratio = albumin ÷ globulin, with both in the same unit (for example g/dL). Globulin = total protein − albumin when it is not reported directly.
A worked example
Example numbers, not anyone’s real results, run through the same code as the calculator above.
| Albumin | 4.3 g/dL |
|---|---|
| Globulin | 2.7 g/dL |
| A/G ratio | 1.6 ratio |
For an adult, this result is in the usual range.
What A/G ratio tells you
Blood proteins come in two big groups. Albumin is made by the liver and keeps fluid inside blood vessels. Globulins include antibodies and carrier proteins, and are made by the liver and by immune cells. The A/G ratio is albumin divided by globulin. Globulin is usually worked out by subtracting albumin from total protein, so labs can print the ratio without any extra blood test.
The ratio shows whether the balance between these two protein groups has shifted. Albumin is usually higher than globulin, so the ratio is usually above 1. A low ratio can come from lower albumin, higher globulin or both, and a high ratio usually means globulin is low. The ratio alone doesn't say which protein changed or why, so clinicians read it together with albumin, globulin and total protein.
Read the full page on A/G ratio, 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
- Comprehensive Metabolic Panel (test code 10231): lists Globulin (calculated) and Albumin/Globulin Ratio (calculated), and describes total protein as the sum of albumin and globulins, Quest Diagnostics
- Comp. Metabolic Panel (14) (test 322000), sample patient report, Labcorp
5 more sources for the ranges and the explanation
- Pediatric Testing Reference Ranges (A/G Ratio, result 012047), Labcorp
- Total Protein and Albumin-Globulin (A/G) Ratio (MedlinePlus Lab Tests), MedlinePlus, National Library of Medicine
- Low albumin-to-globulin ratio associated with cancer incidence and mortality in generally healthy adults, Annals of Oncology (2014)
- Pretreatment albumin to globulin ratio can serve as a prognostic marker in human cancers: a meta-analysis, Clinica Chimica Acta (2018)
- LOINC codes for albumin/globulin ratio (NLM Clinical Tables search), National Library of Medicine
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.