Insulin-to-Carb Ratio

Name: Insulin-to-Carb Ratio
Creator: Daniel Diaz-Gil, MD
Keywords: insulin to carb ratio, ICR, carbohydrate counting, diabetes, type 1, TDD, bolus, endocrinology, pediatric

Calculates insulin-to-carbohydrate ratio using the 500 rule with age-based typical ranges

Clinically Verified· 5 tests

For educational and informational purposes only. Verify all results before clinical application.

Total Daily Insulin Dose (units) *

units

Age

years

Age-based insulin-to-carbohydrate ratio ranges. Younger children are typically more insulin-sensitive (higher ICR), while adolescents may need lower ratios.

References

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. 2008;14(9):1095-1101.[DOI]

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for endocrine assessment

Pediatric Endocrinology HandbookClinical reference for pediatric endocrine disorders~$70via Amazon Growth & Puberty Reference GuideQuick-reference for Tanner staging, growth velocity, and bone age~$15via Amazon