QUICKI Calculator
Calculate your QUICKI (Quantitative Insulin Sensitivity Check Index) from fasting glucose and insulin. Assess insulin sensitivity, resistance risk, and get detailed formula breakdown with charts.
About This Calculator
The QUICKI (Quantitative Insulin Sensitivity Check Index) calculator assesses insulin sensitivity using your fasting glucose and insulin levels. Developed by Katz et al. in 2000 and published in the Journal of Clinical Endocrinology & Metabolism, QUICKI provides a simple yet accurate method for evaluating insulin sensitivity that correlates well with the gold-standard hyperinsulinemic euglycemic clamp technique.
The QUICKI index is calculated as the inverse of the sum of the base-10 logarithms of fasting insulin and fasting glucose: QUICKI = 1 / (log₁₀(insulin) + log₁₀(glucose)). Fasting insulin is measured in mU/L (µU/mL) and fasting glucose in mg/dL (or mmol/L which our calculator automatically converts). The resulting index typically ranges from 0.30 in individuals with diabetes to 0.45 in healthy individuals with normal insulin sensitivity.
Regional Notes: Insulin sensitivity assessment is important globally. In India, rising type 2 diabetes rates make QUICKI screening increasingly relevant — the Indian Council of Medical Research (ICMR) recommends routine diabetes screening for adults over 30 with risk factors. In the US, the American Diabetes Association (ADA) notes that insulin resistance affects over 30% of adults. In the UK, the National Health Service (NHS) includes insulin resistance testing as part of diabetes risk assessment, particularly for individuals with obesity, hypertension, or family history of type 2 diabetes.
QUICKI has been validated across diverse populations including Caucasian, Asian, and African American groups, making it a broadly applicable screening tool. However, test results should always be interpreted by a healthcare professional as part of a comprehensive clinical assessment.
Frequently Asked Questions
What is the QUICKI index?
QUICKI (Quantitative Insulin Sensitivity Check Index) is a simple, accurate method for assessing insulin sensitivity in humans. It was developed by Katz et al. in 2000 and uses only fasting insulin and fasting glucose values to calculate an index that correlates well with the gold-standard glucose clamp technique.
How is QUICKI calculated?
QUICKI is calculated using the formula: QUICKI = 1 / (log₁₀(insulin) + log₁₀(glucose)), where insulin is measured in mU/L (µU/mL) and glucose in mg/dL. For example, with fasting insulin of 15 mU/L and fasting glucose of 103 mg/dL: QUICKI = 1 / (log₁₀(15) + log₁₀(103)) = 1 / (1.176 + 2.013) = 1 / 3.189 = 0.313.
What does a normal QUICKI value look like?
A normal QUICKI value is 0.45 or higher, indicating healthy insulin sensitivity. Values between 0.339 and 0.45 suggest reduced insulin sensitivity, values below 0.339 indicate insulin resistance, and values of 0.30 or below are associated with diabetes and severe insulin resistance.
How is QUICKI different from HOMA-IR?
Both QUICKI and HOMA-IR assess insulin resistance using fasting glucose and insulin. QUICKI uses the inverse log sum formula (1 / (log₁₀(insulin) + log₁₀(glucose))), while HOMA-IR uses (insulin × glucose) / 405. QUICKI tends to have better correlation with the glucose clamp method, especially in individuals with mild insulin resistance.
What values of fasting glucose and insulin do I need?
You need two values from a fasting blood test: fasting plasma glucose (in mg/dL or mmol/L) and fasting insulin (in mU/L or µU/mL). Fasting means no food or drink except water for at least 8 hours. Typical normal fasting glucose is 70-100 mg/dL (3.9-5.6 mmol/L), and normal fasting insulin is 2-25 mU/L.
Can I use this calculator for diagnosis?
No. This calculator is for educational and reference purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for interpretation of your lab results and for any health concerns.
What factors affect insulin sensitivity?
Insulin sensitivity can be affected by body weight (obesity decreases sensitivity), physical activity level, diet (high-calorie diets reduce sensitivity), sleep quality, stress levels, medications (such as steroids), and hormonal disorders such as Cushing's syndrome. Improving diet, increasing exercise, and maintaining a healthy weight can help improve insulin sensitivity.