Make sense of your
metabolic numbers.
Fasting insulin, glucose and HbA1c—connected through transparent calculators, practical explanations and original research.
HOMA-IR calculator
Use paired fasting glucose and insulin.
Every result includes its assumptions.
One place. 10 useful tools.
HOMA-IR calculator
HOMA1 insulin resistance, beta-cell estimate and reciprocal sensitivity.
Open calculator 02 Insulin sensitivityQUICKI calculator
A logarithmic index from paired fasting glucose and insulin.
Open calculator 03 Triglycerides + glucoseTyG index calculator
Calculate the triglyceride–glucose index without an insulin assay.
Open calculator 04 Average glucoseHbA1c ↔ eAG calculator
Translate HbA1c into estimated average glucose, or reverse the estimate.
Open calculator 05 mg/dL ↔ mmol/LGlucose unit converter
Convert blood glucose between conventional and SI units.
Open calculator 06 µIU/mL ↔ pmol/LInsulin unit converter
Convert insulin with an explicit, selectable assay conversion factor.
Open calculator 07 ng/mL ↔ nmol/LC-peptide unit converter
Convert C-peptide units without estimating an insulin concentration.
Open calculator 08 % ↔ mmol/molHbA1c unit converter
Convert NGSP percent and IFCC mmol/mol using the master equation.
Open calculator 09 Weight + heightAdult BMI calculator
Calculate body mass index in metric or imperial units.
Open calculator 10 Waist + heightWaist-to-height calculator
Compare waist circumference with height using consistent units.
Open calculatorA result needs context.
HOMA-IR is an estimate. The assay, fasting conditions and the model all matter when interpreting it.
Read the interpretation guide →- Check the sample.Paired fasting values are essential.
- Check the model.HOMA1 and HOMA2 results differ.
- Check the context.No single HOMA cutoff applies to everyone.
Understand the tests.
HOMA-IR normal range: why cutoffs differ
A reference range only helps when it matches the model, assay and population used for your result.
Read the guide →LEARNING GUIDEFasting insulin vs HbA1c: what each test tells you
These markers describe different aspects of glucose regulation. One cannot be converted into the other.
Read the guide →LEARNING GUIDEFasting glucose and insulin test preparation
Start with the instructions for the tests actually ordered. A calculator cannot repair an unsuitable sample.
Read the guide →Before you interpret a score.
What is a normal HOMA-IR level?
There is no universal normal cutoff. Assays and study populations differ; use an appropriate laboratory or research reference with clinical interpretation.
Source: Oxford HOMA calculator and FAQs (opens in a new tab) · Related calculator → · Link to answer
What is the difference between HOMA1 and HOMA2?
HOMA1 uses simple approximation equations. HOMA2 uses an iterative computer model; its results cannot be reproduced by relabelling the HOMA1 equations.
Source: Oxford HOMA calculator and FAQs (opens in a new tab) · Related calculator → · Link to answer
Can I calculate HOMA-IR with C-peptide?
C-peptide cannot replace insulin in the HOMA1 equation. Oxford’s HOMA2 software supports C-peptide within its own model and documented conditions.
Source: Oxford HOMA calculator and FAQs (opens in a new tab) · Related calculator → · Link to answer
Does a high HOMA-IR diagnose diabetes?
No. Diabetes assessment uses established glucose and A1C tests, sometimes with repeat confirmation. HOMA-IR alone is not a diagnostic criterion.
Source: NIDDK · Diabetes tests and diagnosis (opens in a new tab) · Related calculator → · Link to answer