---
title: "HOMA-IR Calculator | Insulin Resistance | Numequo"
description: "Calculate the original HOMA1-IR estimate from fasting glucose and insulin laboratory values. Free, fast and easy to use."
canonical: "https://www.numequo.com/health/diabetes-blood-glucose/homa-ir-calculator/"
locale: "en"
---
[Numequo](https://www.numequo.com/) › [Health](https://www.numequo.com/health/) › [Diabetes and blood glucose](https://www.numequo.com/health/diabetes-blood-glucose/)

# HOMA-IR Calculator | Insulin Resistance

Enter fasting glucose and fasting insulin from the same blood draw. The result is an educational estimate and not a diagnosis.

## Input data

- **Glucose unit** - type: choice; default: mmol; options: mmol/L, mg/dL
- **Fasting glucose** - type: number; default: 5; min: 0.01; max: 2000; step: 0.01
- **Fasting insulin (µIU/mL)** - type: number; default: 10; min: 0.01; max: 1000; step: 0.01

## How it works

HOMA1-IR = fasting insulin (µIU/mL) × fasting glucose (mmol/L) ÷ 22.5. With glucose in mg/dL, divide the product by 405.

> This estimate is educational and is not medical advice.

## Quick examples

- **5 mmol/L and 10 µIU/mL** - Glucose unit: mmol, Fasting glucose: 5, Fasting insulin (µIU/mL): 10
- **90 mg/dL and 8 µIU/mL** - Glucose unit: mg, Fasting glucose: 90, Fasting insulin (µIU/mL): 8
- **6 mmol/L and 15 µIU/mL** - Glucose unit: mmol, Fasting glucose: 6, Fasting insulin (µIU/mL): 15

## Understanding your result

HOMA1-IR approximates insulin resistance from fasting laboratory values. There is no universal diagnostic cut-off: interpretation varies with population, assay and clinical context and should be performed by a health professional.

Last verified: 29 September 2026 (2026-09-29)

## Sources

- <a href="https://pubmed.ncbi.nlm.nih.gov/3899825/" rel="nofollow">Original HOMA study</a>

## Frequently asked questions

### What is HOMA-IR?

It is a model-based estimate of insulin resistance derived from fasting glucose and insulin.

### Do the values need to be fasting?

Yes. The original model is based on basal fasting glucose and insulin measured together.

### What HOMA-IR value means insulin resistance?

There is no single universal threshold. A clinician must interpret the result using the laboratory method, population and medical context.

### Is HOMA1-IR the same as HOMA2?

No. This page calculates the original formula-based HOMA1-IR. HOMA2 uses a different computer model.

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