Table 6.1

Mean glucose levels for specified A1C levels (37,43)

A1CMean plasma glucose*Mean fasting glucoseMean premeal glucoseMean postmeal glucoseMean bedtime glucose
% (mmol/mol)mg/dLmmol/Lmg/dLmmol/Lmg/dLmmol/Lmg/dLmmol/Lmg/dLmmol/L
6 (42)126 (100–152)7.0 (5.5–8.5)
5.5–6.49 (37–47)122 (117–127)6.8 (6.5–7.0)118 (115–121)6.5 (6.4–6.7)144 (139–148)8.0 (7.7–8.2)136 (131–141)7.5 (7.3–7.8)
6.5–6.99 (47–53)142 (135–150)7.9 (7.5–8.3)139 (134–144)7.7 (7.4–8.0)164 (159–169)9.1 (8.8–9.4)153 (145–161)8.5 (8.0–8.9)
7 (53)154 (123–185)8.6 (6.8–10.3)
7.0–7.49 (53–58)152 (143–162)8.4 (7.9–9.0)152 (147–157)8.4 (8.2–8.7)176 (170–183)9.8 (9.4–10.2)177 (166–188)9.8 (9.2–10.4)
7.5–7.99 (58–64)167 (157–177)9.3 (8.7–9.8)155 (148–161)8.6 (8.2–8.9)189 (180–197)10.5 (10.0–10.9)175 (163–188)9.7 (9.0–10.4)
8 (64)183 (147–217)10.2 (8.1–12.1)
8.0–8.5 (64–69)178 (164–192)9.9 (9.1–10.7)179 (167–191)9.9 (9.3–10.6)206 (195–217)11.4 (10.8–12.0)222 (197–248)12.3 (10.9–13.8)
9 (75)212 (170–249)11.8 (9.4–13.9)
10 (86)240 (193–282)13.4 (10.7–15.7)
11 (97)269 (217–314)14.9 (12.0–17.5)
12 (108)298 (240–347)16.5 (13.3–19.3)
  • Data in parentheses represent 95% CI, unless otherwise noted. A calculator for converting A1C results into eAG, in either mg/dL or mmol/L, is available at http://professional.diabetes.org/eAG. *These estimates are based on ADAG data of ∼2,700 glucose measurements over 3 months per A1C measurement in 507 adults with type 1, type 2, and no diabetes. The correlation between A1C and average glucose was 0.92 (43).