HOMA-IR Calculator

Calculate your HOMA-IR insulin resistance score instantly from fasting glucose and fasting insulin lab values.

Use the HOMA-IR Calculator

Enter Fasting Lab Values

Normal fasting range: 70–99 mg/dL (3.9–5.5 mmol/L)

Also written as µIU/mL — numerically identical to mIU/L

Reference Ranges

Optimal < 1.0
Normal 1.0 – 1.9
Borderline Resistant 2.0 – 2.9
Insulin Resistant 3.0 – 4.9
Highly Resistant ≥ 5.0

Enter your fasting glucose and insulin values, then click Calculate.

Summary

HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) quantifies insulin resistance from a single fasting blood draw. The formula is (fasting glucose in mmol/L × fasting insulin in mIU/L) ÷ 22.5. A score below 1.0 reflects excellent insulin sensitivity; scores above 2.0 suggest developing resistance and values above 3.0 indicate clinically significant insulin resistance. HOMA-IR is widely used in research and clinical screening for pre-diabetes and metabolic syndrome.

How it works

  1. Enter your fasting plasma glucose and choose the unit (mg/dL or mmol/L).
  2. Enter your fasting serum insulin in mIU/L (equivalent to µIU/mL).
  3. Click Calculate — the tool converts glucose to mmol/L if needed and applies the HOMA-IR formula.
  4. Your HOMA-IR score appears with a color-coded interpretation band.
  5. Review the visual gauge and calculation breakdown to understand your result.

Use cases

  • Screen for early insulin resistance and pre-diabetes.
  • Track metabolic improvements from diet or exercise over time.
  • Interpret fasting glucose and insulin lab results at home.
  • Support lifestyle interventions for weight management or metabolic syndrome.
  • Compare results in different glucose units (mg/dL vs mmol/L).
  • Prepare informed questions before a doctor or dietitian appointment.

Frequently Asked Questions

Last updated: 2026-09-30 · Reviewed by Nham Vu