# HOMA-IR Calculator Calculate your HOMA-IR score from fasting insulin and glucose levels. Assess insulin resistance and beta cell function with clinical interpretation. ## What this calculates HOMA-IR (Homeostatic Model Assessment for Insulin Resistance) is a widely used method to estimate insulin resistance from a simple fasting blood test. Enter your fasting insulin and fasting glucose levels to get your HOMA-IR score and beta cell function estimate. ## Inputs - **Fasting Insulin** (µU/mL) — min 0.1, max 200 — Fasting serum insulin level - **Fasting Glucose** (mg/dL) — min 30, max 500 — Fasting blood glucose level ## Outputs - **HOMA-IR Score** — Homeostatic Model Assessment for Insulin Resistance - **Interpretation** — formatted as text — Insulin resistance classification based on HOMA-IR value - **HOMA-%B (Beta Cell Function)** — Estimated beta cell function percentage - **Beta Cell Interpretation** — formatted as text — Assessment of pancreatic beta cell function ## Details The HOMA-IR formula was developed by Matthews et al. in 1985 and has become one of the most commonly used research and clinical tools for estimating insulin resistance without requiring an expensive and time-consuming glucose clamp test. The formula: HOMA-IR = (Fasting Insulin in uU/mL x Fasting Glucose in mmol/L) / 22.5. A lower HOMA-IR value indicates better insulin sensitivity. While there is no universally agreed-upon cutoff, many studies use the following ranges: - **Below 1.0:** Optimal insulin sensitivity - **1.0 to 1.9:** Normal range - **2.0 to 2.9:** Early insulin resistance - **3.0 and above:** Significant insulin resistance The calculator also provides HOMA-%B, which estimates pancreatic beta cell function. This is useful because insulin resistance and beta cell decline often progress together in the development of type 2 diabetes. HOMA-IR has some limitations. It requires a true fasting sample (at least 8 hours), it is less reliable in people with very high or very low glucose levels, and it assumes a normal feedback loop between the liver and pancreas. Results should be interpreted alongside other metabolic markers and clinical context. This calculator is for educational purposes and should not replace professional medical advice. ## Frequently Asked Questions **Q: What is a normal HOMA-IR score?** A: A HOMA-IR below 1.0 indicates optimal insulin sensitivity. Values between 1.0 and 1.9 are generally considered normal. Scores of 2.0 to 2.9 suggest early insulin resistance, and values of 3.0 or higher indicate significant insulin resistance. Cutoffs vary slightly by study population and ethnicity, so discuss your result with your doctor for proper interpretation. **Q: Do I need to fast before getting these blood tests?** A: Yes. Both fasting insulin and fasting glucose must be drawn after at least 8 hours of fasting (typically overnight) for HOMA-IR to be accurate. Eating before the blood draw raises both insulin and glucose, which will inflate the HOMA-IR score and give a misleading result. **Q: Can HOMA-IR detect prediabetes?** A: HOMA-IR can identify insulin resistance before blood glucose levels rise into the prediabetic range. Many people with normal fasting glucose already have elevated HOMA-IR, meaning their pancreas is working harder to keep glucose normal. Catching this early allows for lifestyle interventions (diet, exercise, weight management) that can prevent progression to prediabetes and type 2 diabetes. **Q: How can I lower my HOMA-IR score?** A: The most effective ways to improve insulin sensitivity include regular exercise (both cardio and resistance training), weight loss if overweight, reducing refined carbohydrates and added sugars, improving sleep quality, and managing stress. Even modest weight loss of 5-10% of body weight can significantly improve HOMA-IR. In some cases, medications like metformin may be prescribed. Always work with your healthcare provider on a plan. --- Source: https://vastcalc.com/calculators/health/homa-ir Category: Health & Fitness Last updated: 2026-04-08