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Glycaemic Index Meal Calculator

Work out glycaemic index meal instantly with clear inputs, formula shown and shareable results.

About Glycaemic Index Meal Calculator

Weights each food's glycaemic index by its carbohydrate contribution, which is how a mixed meal index is calculated.

Formula

Mixed meal index

Meal GI = sum of (food GI x food carbohydrate) / total carbohydrate; meal GL = meal GI x total carbohydrate / 100

Worked example

With the default values below, Glycaemic Index Meal Calculator returns Meal glycaemic index of 61.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Glycaemic index of the first foodaccepts 1–120
55
Carbohydrate from the first foodaccepts 0–300 g
30 g
Glycaemic index of the second foodaccepts 1–120
70
Carbohydrate from the second foodaccepts 0–300 g
20 g

Results

Meal glycaemic index
61.00
Meal glycaemic load
30.500
Total carbohydrate in the meal
50.00 g
Meal band
Medium glycaemic index meal

Step by step

  1. 1Values used
  2. 2Mixed meal index
  3. 3Meal glycaemic index= 61.00
  4. 4Meal glycaemic load= 30.500
  5. 5Total carbohydrate in the meal= 50.00 g
  6. 6Meal band= Medium glycaemic index meal

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Do fat and protein change the response?

Yes. They slow gastric emptying, so a mixed meal usually produces a flatter response than the calculated index suggests.

Which foods are low index?

Most legumes, intact grains, dairy and non-starchy vegetables sit below 55.

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