Calculate glycemic load from a food’s glycemic index and carbohydrate content, with an optional second food for a meal total.
Result
How to use this tool
The food’s GI value, usually found in GI tables.
Grams of carbohydrate in the portion, excluding fibre where the table already does.
The advanced section adds another food for a meal total.
Low, medium or high, with the numeric load.
Formula & worked example
A food with GI 70 and 30 g of carbohydrate gives 70 x 30 / 100 = 21.0, a high glycemic load.
Limitations — read this before you rely on it
Educational use only. This tool is for education only and is not medical advice. Talk to a clinician about any result that worries you, and never change treatment because of a calculator result.
Frequently asked questions
GI ranks how fast a food raises blood sugar; glycemic load also accounts for how much carbohydrate is actually eaten, so it reflects the real portion.
10 or below per food or meal. Medium is 11-19 and high is 20 or above.
Yes, a classic example: watermelon has a high GI but little carbohydrate per serving, so its glycemic load is low.
No. It complements carbohydrate counting and clinical advice; it does not set insulin doses.
Ripeness, cooking, processing and what else is eaten with the food all change the measured GI.