Glycemic Load Calculator
Calculate the glycemic load (GL) of any food using its glycemic index and carbohydrate content.
Includes preset GI values for common foods.
Glycemic Load vs Glycemic Index The Glycemic Index (GI) ranks carbohydrates on a scale of 0–100 based on how quickly they raise blood sugar. However, GI alone is misleading — it doesn’t account for how much of a food you actually eat.
Glycemic Load (GL) fixes this by combining both the GI and the actual carbohydrate content in a serving:
Formula: GL = (GI × Net Carbs) / 100
Where:
- GI = Glycemic Index of the food (0–100)
- Net Carbs = Total Carbohydrates − Fiber (in grams)
- Fiber is subtracted because it does not raise blood sugar
GL Classifications
- Low GL: 0–9 (minimal blood sugar impact)
- Medium GL: 10–19 (moderate impact)
- High GL: 20 or above (significant blood sugar spike)
Daily GL Budget A typical healthy daily GL target is under 100. Diabetics and pre-diabetics are often advised to stay under 80 per day.
Why Net Carbs? Dietary fiber passes through the digestive system without being converted to glucose. Subtracting fiber gives a more accurate picture of how much carbohydrate will actually affect blood sugar.
A Classic Example Watermelon has a high GI of 76 — but a typical 120g serving has only 6g of net carbs, giving a GL of just 5 (low). This shows why GI alone can be misleading for foods eaten in normal portions.
Who Should Use This? People managing type 1 or type 2 diabetes, pre-diabetes, or those following low-glycemic diets (such as the Mediterranean or South Beach diet) will find GL tracking especially useful.