Grams (g) of carbohydrate per 100g:

Portion size in grams (g):

Insulin to carbohydrate ratio:

Calculate Bolus

The Bolus calculator works based on the simple equation taught by the NHS Diabetes Service:

Grams of carbohydrates per 100g / 100 x portion size in grams = carbohydrates consumed

Carbohydrates consumed / Insulin to carbohydrate ratio = Bolus insulin

Decimal points equal to or greater than 5 will be rounded up.