| Glycemic Assessment: A1C to Average Glucose Conversions |
Notes
- Click any of the four input boxes to enter a value. The other three values will be calculated from your input.
- A1C: hemoglobin A1C.
- DCCT is the Diabetes Control and Complications Trial.
- IFCC is the International Federation of Clinical Chemistry.
- Equations used when A1C(%) is entered:
- A1C(mmol/mol) = 10.929 * (A1C(%) - 2.15)
- Estimated average glucose(mg/dL) = (28.7 * A1C(%)) - 46.7
- Estimated average glucose(mmol/L) = Estimated average glucose(mg/dL) / 18.015
- Equations used when A1C(mmol/mol) is entered:
- A1C(%) = (A1C(mmol/mol) / 10.929) + 2.15
- Estimated average glucose(mg/dL) = (28.7 * A1C(%)) - 46.7
- Estimated average glucose(mmol/L) = Estimated average glucose(mg/dL) / 18.015
- Equations used when Estimated average glucose(mg/dL) is entered:
- A1C(%) = (Estimated average glucose(mg/dL) + 46.7) / 28.7
- A1C(mmol/mol) = 10.929 * (A1C(%) - 2.15)
- Estimated average glucose(mmol/L) = Estimated average glucose(mg/dL) / 18.015
- Equations used when Estimated average glucose(mmol/L) is entered:
- Estimated average glucose(mg/dL) = Estimated average glucose(mmol/L) * 18.015
- A1C(%) = (Estimated average glucose(mg/dL) +46.7) / 28.7
- A1C(mmol/mol) = 10.929 * (A1C(%) - 2.15)
References
- Nathan DM, Kuenen J, Borg R, et al., A1c-Derived Average Glucose Study Group. Translating the A1C assay into estimated average glucose values. A1c-Derived Average Glucose Study Group. Diabetes Care. 2008 Aug;31(8):1473-8. Epub 2008 Jun 7. Erratum in: Diabetes Care. 2009 Jan;32(1):207. PubMed ID: 18540046
- Trevino G. Consensus statement on the Worldwide Standardization of the Hemoglobin A1C Measurement: the American Diabetes Association, European Association for the Study of Diabetes, International Federation of Clinical Chemistry and Laboratory Medicine, and the International Diabetes Federation: response to the Consensus Committee. Diabetes Care. 2007 Dec;30(12):e141. PubMed ID: 18042750
- Hoelzel W, Weykamp C, Jeppsson JO, et al., IFCC Working Group on HbA1c Standardization. IFCC reference system for measurement of hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan, and Sweden: a method-comparison study. Clin Chem. 2004 Jan;50(1):166-74. PubMed ID: 14709644
- Little RR, Sacks DB. HbA1c: how do we measure it and what does it mean? Curr Opin Endocrinol Diabetes Obes. 2009 Apr;16(2):113-8. Review. PubMed ID: 19300091
Associated Medical Subject Headings [MeSH]
| Adult, Aged, Ambulatory, Blood Chemical Analysis, Blood Glucose, Calibration, Clinical Laboratory Techniques, Diabetes Mellitus, Female, Glucose, Glycosylated, Hemoglobin A, Hemoglobins, Humans, International Cooperation, Laboratories, Male, Middle Aged, Models, Monitoring, National Health Programs, Reference Standards, Reference Values, Regression Analysis, Theoretical, Type 1, Type 2 |
Associated ICD10-CM Codes
| E11.65 | Type 2 diabetes mellitus with hyperglycemia | |
| E10.65 | Type 1 diabetes mellitus with hyperglycemia | |
| E10.9 | Type 1 diabetes mellitus without complications | |
| O24.319 | Unspecified pre-existing diabetes mellitus in pregnancy, unspecified trimester | |
| Z13.1 | Encounter for screening for diabetes mellitus |
Associated ICD9-CM Codes
| V77.1 | Screen-diabetes mellitus | |
| 648.00 | Diabetes in preg-unspec | |
| 250.01 | Dmi wo cmp nt st uncntrl | |
| 250.03 | Dmi wo cmp uncntrld | |
| 250.02 | Dmii wo cmp uncntrld |
All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer. |