Glycemic Index & Load Calculator

Enter a glucose-scale GI value, available carbohydrate per serving, and servings. Do not substitute total carbohydrate unless fiber and other unavailable carbohydrate have been excluded.

$GL=GI\times\text{available carbohydrate per serving}\times\text{servings}/100$

GL is classified on its unrounded value: low at or below 10, intermediate above 10 and below 20, and high at or above 20. Published glucose-scale GI food categories are low at or below 55, intermediate from 56 through 69, and high at or above 70. Decimal GI values in the unstated intervals (55, 56) and (69, 70) receive no GI category; numeric GL calculation and GL classification continue independently.

GI is a standardized relative food test based on incremental glucose area under the curve after a test food versus pure glucose, multiplied by 100. It does not predict an individual’s glucose response and does not diagnose or control diabetes. GL is likewise a food-serving category convention, not a food-health judgment.

One-serving glycemic-load mode

The glycemic-load preset preserves the two-input, one-serving workflow:

$GL=GI\times\text{available carbohydrate}/100$

Enter available carbohydrate, not total carbohydrate, unless fiber and other unavailable carbohydrate have been excluded. This mode has no mutable servings control. It classifies the unrounded result before formatting: low at 10 or below, medium above 10 and below 20, and high at 20 or above.

That order matters at display boundaries. GI 50.0005 with 20 g gives a raw GL of 10.0001, which displays as 10.0 but remains medium. GI 100 with 19.95 g gives a raw GL of 19.95, which displays as 20.0 but also remains medium. These are food-serving category conventions, not predictions of an individual’s glucose response, diabetes guidance, or judgments of a food’s overall healthfulness.

Example

GI 70, 15 g available carbohydrate, and one serving gives GL 10.5, displayed as intermediate GL. GI 55.0001 has no published category under the exact integer category statements, but its GL is still calculated.

Source

• Oregon State University Linus Pauling Institute, Glycemic Index and Glycemic Load — standardized GI method, glucose-scale category statements, GL formula/categories, and interpretation limits.