How do I calculate the HOMA-IR index?

Using the formula: fasting glucose (mmol/L) × fasting insulin (µU/mL) / 22.5. The calculator does it instantly — enter both values from a fasting blood test.

What is a normal HOMA-IR?

A guide is below 2.7. The 2.7–3.8 range is borderline, above 3.8 suggests insulin resistance. The exact cut-off depends on the lab and insulin assay.

Yes, both glucose and insulin must be drawn strictly fasting (8–12 hours without food). Otherwise the index is inflated and loses meaning.

Is a high HOMA-IR diabetes?

No. It’s insulin resistance — an early stage that lifestyle can often reverse. A doctor makes the diagnosis and sets the plan based on the full set of tests.

HOMA-IR calculator (insulin resistance index)

Enter fasting glucose and fasting insulin — the calculator computes the HOMA-IR index and shows whether it’s within the norm or points to insulin resistance. HOMA-IR is a simple way to gauge how well cells respond to insulin, long before diabetes appears.

Compute the HOMA-IR index

Enter fasting glucose and insulin — the index appears instantly.

What the HOMA-IR index means

Approximate adult thresholds; the exact cut-off depends on the lab and the insulin assay.

HOMA-IR	Assessment
below 2.7	Normal
2.7–3.8	Borderline
above 3.8	Insulin resistance

What HOMA-IR is

HOMA-IR (Homeostasis Model Assessment of Insulin Resistance) is a calculated index that estimates insulin resistance from two fasting tests: glucose and insulin. It shows whether the pancreas has to make more insulin to keep sugar normal.

Insulin resistance is an early stage on the way to type 2 diabetes and part of metabolic syndrome. Catching it early matters — at this stage much is reversible with lifestyle.

How HOMA-IR is calculated

Formula: HOMA-IR = fasting glucose (mmol/L) × fasting insulin (µU/mL) / 22.5. Both values must be drawn fasting or the result is distorted. A normal guide is below 2.7; 2.7–3.8 is borderline; above 3.8 is usually read as insulin resistance.

Thresholds are approximate and depend on the lab and insulin assay, so always cross-check with the reference range on your report.

What to do with a high index

A raised HOMA-IR isn’t a diagnosis — it’s a signal. It’s most often driven by excess weight (especially around the belly), inactivity and a diet high in fast carbs. Losing weight, regular activity and eating patterns can markedly improve insulin sensitivity. A doctor — an endocrinologist or GP — sets the plan.

Frequently asked questions

Using the formula: fasting glucose (mmol/L) × fasting insulin (µU/mL) / 22.5. The calculator does it instantly — enter both values from a fasting blood test.
A guide is below 2.7. The 2.7–3.8 range is borderline, above 3.8 suggests insulin resistance. The exact cut-off depends on the lab and insulin assay.
Yes, both glucose and insulin must be drawn strictly fasting (8–12 hours without food). Otherwise the index is inflated and loses meaning.
No. It’s insulin resistance — an early stage that lifestyle can often reverse. A doctor makes the diagnosis and sets the plan based on the full set of tests.

Insulin and sugar are part of a bigger picture

Upload your glucose, insulin and HbA1c results — the AI reads them together, links them to weight and lipids, and tells you what to do.

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This calculator is for information only and is not a diagnosis. Insulin resistance is assessed by a doctor from the full set of tests.