What this calculator does
HOMA-IR (insulin resistance) works out estimated insulin resistance from fasting glucose and fasting insulin levels. 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
FormulaHOMA-IR = (fasting glucose(mg/dL) × fasting insulin(μU/mL)) / 405
The inputs explained
| Field | What to enter |
|---|---|
| Fasting glucose (mg/dL) | A number, measured in mg/dL. Starts at 90. |
| Fasting insulin (μU/mL) | A number, measured in μU/mL. Starts at 8. |
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 fasting glucose
Every other input is held at the calculator’s starting values while fasting glucose varies. Select any row to load that scenario into the calculator.
How the answer changes with fasting glucose
| Fasting glucose (mg/dL) | HOMA-IR | Commonly cited normal range | Note |
|---|---|---|---|
| 45 | 0.89 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |
| 67.5 | 1.33 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |
| 90 | 1.78 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |
| 135 | 2.67 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |
| 180 | 3.56 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |
| 270 | 5.33 | below about 2.0 | A screening estimate: interpretation depends on the lab’s own reference range. |