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Free HOMA-IR calculator, insulin resistance calculator and IDRS-based diabetes risk checker. Identify signs of prediabetes and your type 2 diabetes risk in under 3 minutes. No signup required.
All tools free, instant and built for Indians
A free type 2 diabetes risk test and prediabetes checker that combines an IDRS calculator, a HOMA-IR calculator and an insulin resistance calculator in one tool. It also shows A1c to blood sugar conversion, fasting blood sugar normal range India values, and a diabetes diet plan India recommendation based on your risk zone. Validated against IDRS methodology (NIH/PubMed), ICMR dietary guidelines, and WHO diabetes guidelines.
This tool combines a HOMA-IR calculator, an insulin resistance calculator, and an IDRS-based diabetes risk calculator into a single 10-screen assessment. It identifies signs of prediabetes, calculates your diabetes risk score India across 8 clinical categories, and — if you have lab results — computes your HOMA-IR score and interprets your HbA1c and fasting blood sugar values.
The scoring engine is based on the Indian Diabetes Risk Score (IDRS), validated by the Madras Diabetes Research Foundation and adopted by the Indian Council of Medical Research (ICMR) for population-level screening. It has been extended with additional categories for sleep, stress, thyroid cross-signal, PCOD, alcohol, smoking, and optional lab override logic.
HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) is calculated as (fasting blood sugar mg/dL × fasting insulin µIU/mL) ÷ 405. It is the most widely used clinical marker for insulin resistance outside of a hyperinsulinemic clamp test. A HOMA-IR below 1.0 indicates excellent sensitivity. Values above 2.0 indicate moderate insulin resistance. Above 3.0 is significant and warrants medical review. Above 5.0 is severe. According to WHO guidance, insulin resistance is a primary driver of type 2 diabetes progression.
The IDRS (Indian Diabetes Risk Score) is a validated paper-based screening tool that uses age, waist circumference, physical activity, and family history to estimate diabetes risk in Indian adults. It was designed specifically because Indians develop metabolic disease at lower BMI values than Western populations — a phenomenon called the "Asian Indian phenotype." This tool uses an expanded IDRS model with 8 scoring categories for higher clinical accuracy.
Most people with prediabetes have no symptoms at all — which is why screening tools like this one are essential. When symptoms of prediabetes do appear, they are often subtle and dismissed as tiredness or lifestyle issues. Here are the key warning signs:
If you experience three or more of these signs of prediabetes, get an HbA1c and fasting blood sugar test immediately. Prediabetes is fully reversible with lifestyle changes — but only if caught early.
Understanding your lab values is critical for interpreting diabetes risk. Here is a reference table for HbA1c to blood sugar conversion and fasting blood sugar normal ranges in India:
| HbA1c (%) | Avg Blood Sugar (mg/dL) | Fasting BS (mg/dL) | Status |
|---|---|---|---|
| Below 5.7% | Below 117 | Below 100 | Normal |
| 5.7% – 6.4% | 117 – 137 | 100 – 125 | Prediabetes |
| 6.5% and above | 140 and above | 126 and above | Diabetes |
The fasting blood sugar normal range in India follows the same thresholds as international standards: below 100 mg/dL is normal, 100–125 mg/dL is prediabetic, and ≥126 mg/dL on two separate tests confirms diabetes. However, Indians are at higher metabolic risk at these thresholds than Western populations — the same fasting glucose of 95 mg/dL carries higher risk for an Indian adult with central obesity than for a Western adult. This is why waist circumference (Indian cutoffs: 90cm men, 80cm women) is such a critical input in this tool.
The HbA1c to blood sugar conversion formula is: estimated average glucose (mg/dL) = (HbA1c × 28.7) − 46.7. So an HbA1c of 6.0% corresponds to an average blood sugar of approximately 126 mg/dL.
A HOMA-IR calculator computes your insulin resistance score from two fasting lab values: blood sugar (mg/dL) and insulin (µIU/mL). Formula: HOMA-IR = (fasting glucose × fasting insulin) ÷ 405. Below 1.0 = excellent insulin sensitivity. 1.0–2.0 = normal. Above 2.0 = moderate resistance. Above 3.0 = significant resistance needing medical attention. Above 5.0 = severe resistance. HOMA-IR is one of the most predictive markers for type 2 diabetes risk and PCOS severity.
Common signs of prediabetes include increased thirst and frequent urination, fatigue after meals, blurred vision, slow healing of cuts, tingling in hands or feet, dark patches of skin on the neck or armpits (acanthosis nigricans), and persistent hunger despite eating. Many people with prediabetes have no symptoms at all — which is why regular screening is important, especially if you have risk factors like family history, overweight, or sedentary lifestyle.
Symptoms of prediabetes are often absent or subtle. When present, they include unexplained fatigue, increased hunger, frequent urination, blurred vision, tingling or numbness in extremities, slow wound healing, and recurring infections. An HbA1c between 5.7% and 6.4% confirms prediabetes even without symptoms. Prediabetes is fully reversible through lifestyle changes — losing 5–7% of body weight and exercising 150 minutes per week reduces progression to diabetes by up to 58%.
The HbA1c to blood sugar conversion formula is: estimated average glucose (mg/dL) = (HbA1c × 28.7) − 46.7. Key conversions: HbA1c 5.7% = ~117 mg/dL (prediabetes starts). HbA1c 6.0% = ~126 mg/dL. HbA1c 6.5% = ~140 mg/dL (diabetes threshold). HbA1c 7.0% = ~154 mg/dL. HbA1c 8.0% = ~183 mg/dL. HbA1c reflects average blood sugar over the past 2–3 months, making it more reliable than a single fasting glucose reading.
The IDRS (Indian Diabetes Risk Score) is a validated screening tool developed by the Madras Diabetes Research Foundation for Indian populations. It scores risk on age, waist circumference, physical activity, and family history. A score below 30 = low risk. 30–50 = moderate risk. Above 50 = high risk. DialFit uses an expanded IDRS-based model with 8 additional risk categories — sleep, stress, symptoms, thyroid, PCOD, alcohol, smoking, and optional lab values — for higher clinical accuracy.
The fasting blood sugar normal range in India: below 100 mg/dL is normal. 100–125 mg/dL is the prediabetes range. 126 mg/dL and above on two separate tests confirms diabetes. Indians are advised to use stricter waist circumference cutoffs (90cm men, 80cm women) alongside these glucose thresholds because Indians develop insulin resistance and metabolic complications at lower BMI values than Western populations.
A prediabetes checker assesses your risk through lifestyle, physical measurements, family history, and symptoms. The DialFit checker uses an IDRS-based score across 8 clinical categories plus optional lab values for a confidence-weighted result. It also calculates your HOMA-IR if you provide fasting glucose and insulin values, and shows what your score could be in 3–6 months if you take specific lifestyle actions.
भारत में फास्टिंग ब्लड शुगर की सामान्य रेंज — 100 mg/dL से कम नॉर्मल है। 100–125 mg/dL प्रीडायबिटीज की श्रेणी में आता है। 126 mg/dL या उससे अधिक दो अलग-अलग टेस्ट में मधुमेह की पुष्टि करता है। HbA1c के लिए — 5.7% से कम नॉर्मल, 5.7–6.4% प्रीडायबिटीज, और 6.5% या अधिक मधुमेह है। भारतीय लोगों में पश्चिमी देशों की तुलना में कम BMI पर भी इंसुलिन रेजिस्टेंस विकसित हो जाता है — इसलिए कमर का माप (पुरुष: 90cm, महिला: 80cm) भी उतना ही महत्वपूर्ण है। HOMA-IR कैलकुलेटर से अपना इंसुलिन रेजिस्टेंस स्कोर ऊपर दिए गए टूल से जांचें।
Results are estimates. Consult a doctor before making health decisions.