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Glycemic Load Calculator

Estimate glycemic load from glycemic index and carbohydrate portion size with low, medium, and high load interpretation.

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What Is Glycemic Load?

Glycemic load (GL) estimates how much a serving of food is likely to raise blood sugar by combining glycemic index (GI) with the carbohydrate grams in that portion. GI alone describes carbohydrate quality; GL also reflects quantity. Use the Glycemic Index Calculator to look up GI values for common foods.

Glycemic Load Formula

Glycemic load is calculated as:

$$GL = \frac{GI \times carbs\ in\ portion\ (g)}{100}$$

GI is a 0 to 100 scale relative to pure glucose. Carbs in portion is the digestible carbohydrate grams you actually eat, not total food weight.

Interpreting Results

  • Low load: GL ≤ 10
  • Medium load: GL 11 to 19
  • High load: GL ≥ 20

A medium-GI food can still produce a low GL if the portion is small. Conversely, a large portion of moderate-GI carbs can produce a high GL.

Frequently Asked Questions

How is glycemic load different from glycemic index?

Glycemic index ranks carbohydrate quality on a 0 to 100 scale. Glycemic load also accounts for how many carbohydrate grams are in the serving, so it better reflects real-world meal impact.

What counts as carbs in portion?

Use available or digestible carbohydrate grams from a nutrition label or food database, not total weight of the food.

What is a low glycemic load?

A glycemic load of 10 or less is generally considered low. Values from 11 to 19 are medium, and 20 or above are high.

Can I use this for meal planning with diabetes?

GL can help compare portions, but individual glucose responses vary. Work with a clinician or dietitian for personalized meal planning and medication adjustments.

Where do I find glycemic index values?

Published food tables and our Glycemic Index Calculator list GI values for many common foods.

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