Estimate insulin resistance using fasting glucose and fasting insulin values.
The Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) is a sophisticated tool used to estimate how hard your body is working to keep blood sugar levels in check. It looks at the relationship between your fasting glucose and fasting insulin. In a healthy state, the body maintains a balance where a small amount of insulin is sufficient to keep blood sugar stable. When insulin resistance occurs, the body requires higher levels of insulin to achieve the same effect on glucose.
This measurement is particularly valuable for identifying early shifts in metabolic health, often before blood sugar levels themselves become abnormal. It is used by individuals looking to optimize their metabolic wellness or those at risk for metabolic syndrome. By calculating your HOMA-IR, you can gain a better understanding of your 'insulin sensitivity.' This calculator is an educational resource meant to empower your health discussions with your doctor; it is not a diagnostic tool for diabetes or any other medical condition.
Type in your own measurements — the grey hints are just examples.
Enter in mg/dL. If in mmol/L, multiply by 18.016.
To use the HOMA-IR calculator, you must have results from a fasting blood test—specifically fasting glucose and fasting insulin. It is essential that these tests were performed after at least 8 to 12 hours of no caloric intake, as eating significantly alters both insulin and glucose levels.
Enter your fasting glucose in mg/dL and your fasting insulin in µIU/mL. If your glucose result is in mmol/L, you must multiply it by 18.016 to convert it to mg/dL before entering it into this specific formula. For the most accurate assessment, ensure both tests were performed on the same day from the same blood sample. If you are currently taking insulin or certain glucose-lowering medications, the HOMA-IR calculation may not be applicable or accurate for you.
A HOMA-IR score below 1.0 is generally considered indicative of optimal insulin sensitivity. Scores between 1.0 and 1.9 are typically within the normal range for most adults, though a score closer to 1.0 is often preferred for long-term metabolic health. When the HOMA-IR score reaches 2.0 or higher, it suggests the presence of early insulin resistance, meaning the body is starting to require more insulin to maintain normal glucose levels. A score above 3.0 often indicates significant insulin resistance, which is frequently associated with an increased risk of developing metabolic complications, including type 2 diabetes, non-alcoholic fatty liver disease (NAFLD), and cardiovascular issues.
High HOMA-IR values may be associated with various lifestyle factors, including a sedentary routine, a diet high in processed sugars and refined carbohydrates, or carrying excess visceral fat (weight around the midsection). It can also be a feature of certain hormonal conditions like Polycystic Ovary Syndrome (PCOS) or Cushing's syndrome. Stress and poor sleep quality are also known to temporarily increase insulin resistance. Conversely, very low values are generally a sign of excellent metabolic health, provided they are not caused by an inability of the pancreas to produce insulin (as seen in late-stage type 1 diabetes).
Limitations of this calculator include its reduced accuracy in people with significant pancreatic dysfunction, those with very high fasting glucose levels (where the steady-state assumption fails), or those on exogenous insulin or certain medications like Metformin, GLP-1 agonists, or glucocorticoids. It is also worth noting that HOMA-IR is an estimate and might not capture the dynamic insulin response that occurs after a meal. Related markers to consider include HbA1c, triglycerides, HDL cholesterol, and hs-CRP to assess overall metabolic and inflammatory status.
It is an educational tool that provides a snapshot of metabolic balance. You should always discuss your HOMA-IR results with a healthcare professional, especially if your score is above 2.0. They can interpret them alongside your physical activity levels, waist circumference, family history, and other clinical markers to create a personalized health plan. If you notice symptoms like unexplained fatigue, increased hunger, or darkening of the skin in fold areas (acanthosis nigricans), a consultation is highly recommended.
Related Health Calculators
Learn More
The Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) is a mathematical formula that uses fasting glucose and fasting insulin levels to estimate how insulin-resistant the body may be. It is widely used in research and clinical practice to identify early metabolic dysfunction before blood glucose levels become overtly elevated.
A HOMA-IR below 1.0 is commonly associated with excellent insulin sensitivity. Values between 1.0 and 2.0 are typically considered within the normal range for most adults. Results approaching or exceeding 2.0 may suggest the early stages of insulin resistance, and values above 3.0 can be associated with more significant resistance and increased risk of type 2 diabetes and metabolic syndrome.
HOMA-IR varies with ethnicity, age, body composition, time of day, and fasting status. It is an estimate derived from a simplified mathematical model and should not be used to diagnose insulin resistance or diabetes. Individual cut-off points are not universally agreed upon across all populations.
Explore further with Healio360
If your HOMA-IR is elevated or your fasting glucose and insulin results are abnormal, discuss these findings with your doctor.
Sources & Methodology
These references support the formula, educational ranges, and interpretation used in this calculator. Results are estimates and are not a diagnosis.
Medical Disclaimer
This calculator and its accompanying content are provided for general educational and informational purposes only. They are not intended to be, and should not be used as, a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition or before making decisions about your health. Never disregard professional medical advice or delay seeking it because of information provided by this tool. Healio360 does not warrant the accuracy, completeness, or usefulness of this content and assumes no liability for actions taken based on it.