HOMA-IR calculator
Estimate your insulin resistance with HOMA-IR — the Homeostatic Model Assessment — from two fasting labs: your fasting glucose and fasting insulin. Enter both and you'll get your score instantly, with a plain-English band.
Your privacy: this calculator runs entirely in your browser — nothing you type is sent anywhere. It's the same on-device principle Quanome is built on.
Educational reference only — not medical advice. HOMA-IR is a screening estimate, read alongside fasting glucose, HbA1c and your history; thresholds vary by lab and population.
## What your HOMA-IR score means
| HOMA-IR | How it's usually read |
| --- | --- |
| Below 1.0 | **Optimal** insulin sensitivity |
| 1.0–1.9 | Generally **healthy** range |
| 2.0–2.9 | **Early / moderate** insulin resistance |
| 3.0 and above | **Significant** insulin resistance — worth a clinician's review |
These bands are a common orientation, **not** fixed diagnostic thresholds — cut-offs differ by lab, insulin assay, and population, and the trend over time matters more than a single value. For the fuller picture, see [what your fasting glucose means](/blog/what-your-fasting-glucose-means/).
## The formula
**HOMA-IR = (fasting glucose × fasting insulin) ÷ 405** *(glucose in mg/dL)*
**HOMA-IR = (fasting glucose × fasting insulin) ÷ 22.5** *(glucose in mmol/L)*
Fasting insulin is in **µU/mL** (numerically the same as **mIU/L**). The two formulas agree because 90 mg/dL is the same as 5.0 mmol/L — the divisor just changes with the unit. HOMA-IR captures the balance between your glucose and the insulin needed to hold it there: the more insulin required, the higher the score, and the more insulin-resistant the picture.
## The rest of your metabolic picture
HOMA-IR is one lens — read it with:
- **Fasting glucose** — a snapshot of blood sugar. See [what your fasting glucose means](/blog/what-your-fasting-glucose-means/).
- **HbA1c** — your ~3-month average. See [what your HbA1c means](/blog/what-your-hba1c-means/), or convert it with our [A1c to average glucose calculator](/tools/a1c-to-average-glucose-calculator/).
- **Insulin & glucose ranges** — see [glucose](/blood-test-results/glucose/) and [insulin](/blood-test-results/insulin/) in our blood test results library.
- Working in different units? Our [mmol/L ↔ mg/dL converter](/tools/mmol-mg-dl-converter/) switches glucose between systems.
## Track your metabolic markers over time — privately
A single HOMA-IR is a snapshot; the value is in the **trend**. [Quanome](/) pulls your labs, Apple Health, and even your DNA into one private timeline on your device — parsed locally, never uploaded — with an AI coach that reads your glucose, insulin and HbA1c together.
Track your metabolic health over time, privately
Quanome unifies your labs, Apple Health, and DNA into one private, on-device timeline — with an AI coach. Free on the App Store and Google Play.
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