Table 6.1

Mean glucose levels for specified A1C levels (27,32)

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 (32).