QUICKI was published in 2000 and correlates well with the hyperinsulinaemic-euglycaemic clamp, the gold standard test. Healthy adults usually score about 0.38–0.40; values below about 0.33 suggest insulin resistance.
How to use the QUICKI Calculator
- Fasting glucose
- Fasting insulin
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter fasting glucose and insulin from the same sample. The calculator takes the logarithms, adds them and returns the reciprocal.
Inputs explained
| Field | What to enter |
|---|---|
| Fasting glucose | Units: mg/dL, mmol/L |
| Fasting insulin | In µU/mL |
What each result means
- QUICKI = 1÷(log10([Fasting insulin]) + log10([Fasting glucose]))
- HOMA-IR = [Fasting glucose]×[Fasting insulin]÷405
Example values
How the main result changes when Fasting glucose changes and everything else stays at the example values above:
| Fasting glucose (mg/dL) | QUICKI |
|---|---|
| 45 | 0.391 |
| 67.5 | 0.366 |
| 90 | 0.35 |
| 112.5 | 0.338 |
| 135 | 0.33 |
| 180 | 0.317 |
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
QUICKI = 1 ÷ (log₁₀ fasting insulin (µU/mL) + log₁₀ fasting glucose (mg/dL))
Worked example
Inputs — Fasting glucose: 90 mg/dL; Fasting insulin: 8 µU/mL.
Results — QUICKI = 0.35; HOMA-IR = 1.78.
Key terms
- QUICKI
- Quantitative insulin sensitivity check index.
Frequently asked questions
What is a normal QUICKI?
About 0.38 ± 0.03 in healthy adults.
Is QUICKI better than HOMA-IR?
They carry similar information; QUICKI behaves better statistically.
Why use logarithms?
Fasting insulin is very skewed, and logs make the index more linear with clamp results.