Glycemic Load (GL) Calculator

Glycemic Load (GL): the missing context the Glycemic Index ignores

Glycemic load captures the quality and the quantity of carbs in a serving at once: GL = GI × g_carbs / 100. On its own the Glycemic Index can mislead you, since it says nothing about how much you actually put on the plate. Example: white bread has GI 75, and a 50 g serving carries roughly 50 g of carbs, so GL ≈ 37.5 (high). Carrot also has a fairly high GI of 47, yet a serving holds only about 5 g of carbs, so GL ≈ 2 (low) — it barely moves blood glucose even though it gets labeled a "high-GI food". The bands run ≤10 low, 11–19 medium, ≥20 high, and a daily total under 100 is generally treated as low-load. That is why GL tends to be more useful in the clinic than GI alone: a real meal always comes in a fixed portion.

Applications: type 2 diabetes, prediabetes, low-carb, gestational diabetes

GL shows up across several settings. In type 2 diabetes management the Brazilian Diabetes Society (SBD) recommends low-GL choices to flatten post-prandial peaks. In prediabetes, a low-GL pattern slows progression. On low-carb diets it pairs with carb counting to pick smarter sources, and in gestational diabetes (GDM) low-GL meals improve glycemic control without cutting kcal. It also helps with PCOS, reactive hypoglycemia, and athletes timing carbs around training.

FAQ

Should I avoid every high-GL food? No. Pair them with protein, fat or fiber and keep the portions smaller. Cut the same food in half and its GL drops by 50%.

Is low-GL the same as low-carb? No. A low-GL diet can still be moderate or even high in carbs, as long as those carbs come from low-GI sources such as legumes, oats and whole fruit.

Does cooking method change GL? Yes. Overcooked pasta, mashed potato and ripe bananas push the GI up (and the GL with it), while al dente pasta, cooled-then-reheated starch and greener, less ripe fruit bring it down.