Glucose / Insulin (G/I) Ratio
A direct measure of insulin sensitivity
Last updated on: June 24, 2025
G/I Ratio Calculator
What is the G/I Ratio?
The Glucose-to-Insulin Ratio is a simple calculation used to assess insulin sensitivity. It represents how much glucose is "handled" per unit of insulin.
A higher ratio is favorable, suggesting that a small amount of insulin is sufficient to manage glucose levels effectively, which indicates good insulin sensitivity. A low ratio implies that more insulin is needed to manage the same amount of glucose, a sign of insulin resistance.
Why is the G/I Ratio Useful?
- Provides a simple, intuitive measure of insulin action.
- It is easy to calculate and can be used as a quick screening tool in a clinical setting.
- Changes in the ratio can be used to track progress from lifestyle interventions aimed at improving insulin sensitivity.
Interpreting Your Result (Reference Guide)
Low Ratio / High Resistance (< 4.5):
A low ratio strongly suggests significant insulin resistance. Medical consultation is highly recommended.
Borderline (4.5 - 10):
This range may indicate early or moderate insulin resistance. Lifestyle improvements are beneficial.
Optimal Sensitivity (> 10):
A high ratio indicates good insulin sensitivity, which is the ideal state.
Strategies for a Healthy G/I Ratio
Improving your G/I ratio involves the same core principles as managing overall metabolic health and insulin sensitivity.
- Focus on a balanced, low-glycemic diet.
- Incorporate both aerobic exercise and strength training.
- Aim for a healthy body weight and composition.
- Prioritize sleep and effective stress management techniques.
This page has been medically reviewed by Dr. Khoulah Attia – PharmD, Immunology Specialist.