Glycosylated Hemoglobin (HbA1c)

Home > Calculators > Glycosylated Hemoglobin (HbA1c).
Glycosylated hemoglobin (HbA1c) is formed by the attachment of glucose to hemoglobin (the oxygen carrying protein found in red blood cells). The percentage of glycosylated hemoglobin in the blood reflects the average blood sugar levels over the preceding 2-3 months.
Hemoglobin A1C level an Risk of Malformation

The calculator below can be used to estimate the average blood sugar level based on the measured percentage of glycosylated hemoglobin (HbA1c).

Enter Glycosylated Hemoglobin (HbA1c) =  

Average plasma blood glucose = mg/dl      mmol/L

Average whole blood glucose = mg/dl     mmol/L



  • Average Plasma Blood Glucose (mg/dl) = (HbA1c * 35.6) - 77.3
  • Average Plasma Blood Glucose (mmol/L) = (HbA1c * 1.98) - 4.29
  • Average whole blood glucose = Plasma Blood Glucose / 1.12

Rohlfing CL et al.Defining the Relationship Between Plasma Glucose and HbA1c, Analysis of glucose profiles and HbA1c in the Diabetes Control and Complications Trial," Diabetes Care 25:275-278, 2002.PUBMED

Created 1/7/2006

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