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This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Insulin-to-carbohydrate ratio (500 rule)

Grams of carbohydrate per IU of bolus insulin = 500 / daily dose (young children 330 or 250) – with conversion to IU per bread unit

Details

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

Frequently asked questions

Insulin-to-carbohydrate ratio (500 rule): What does this calculator compute?

Calculates the carbohydrate factor according to the 500 rule (ISPAD 2022): grams of carbohydrate covered by 1 unit of rapid-acting insulin, alternatively with 330 or 250 for young children; additionally outputs units per 10 g carbohydrate (KE) and per 12 g (BE).

Insulin-to-carbohydrate ratio (500 rule): Which sources is this calculator based on?

Cengiz E, Danne T, Ahmad T, et al.: ISPAD Clinical Practice Consensus Guidelines 2022: Insulin treatment in children and adolescents with diabetes (Pediatr Diabetes 23:1277–1296) (2022); Davidson PC, Hebblewhite HR, Steed RD, Bode BW: Analysis of guidelines for basal-bolus insulin dosing: basal insulin, correction factor, and carbohydrate-to-insulin ratio (Endocr Pract 14:1095–1101) (2008)