This Blood Sugar to A1C calculator serves as a crucial instrument for both healthcare providers and patients in monitoring and managing diabetes effectively.
When glucose enters your bloodstream, it binds with hemoglobin (a protein in red blood cells) to form glycated hemoglobin, or A1C. Since red blood cells typically live for about 3 months, the A1C test provides insight into your average blood sugar levels over this period.
If your average blood glucose reading is 180 mg/dL over three months, the calculator would estimate your A1C to be approximately 7.8%. This calculation helps patients understand their long-term blood sugar control without requiring multiple daily readings.
Blood Sugar to A1C Calculator
Blood Sugar (mg/dL) | Calculation Process | Resulting A1C (%) |
---|---|---|
70 | (70 + 46.7) ÷ 28.7 | 4.1% |
80 | (80 + 46.7) ÷ 28.7 | 4.6% |
90 | (90 + 46.7) ÷ 28.7 | 5.0% |
100 | (100 + 46.7) ÷ 28.7 | 5.1% |
110 | (110 + 46.7) ÷ 28.7 | 5.6% |
120 | (120 + 46.7) ÷ 28.7 | 6.0% |
130 | (130 + 46.7) ÷ 28.7 | 6.2% |
140 | (140 + 46.7) ÷ 28.7 | 6.5% |
150 | (150 + 46.7) ÷ 28.7 | 6.9% |
160 | (160 + 46.7) ÷ 28.7 | 7.2% |
170 | (170 + 46.7) ÷ 28.7 | 7.6% |
180 | (180 + 46.7) ÷ 28.7 | 8.0% |
190 | (190 + 46.7) ÷ 28.7 | 8.3% |
200 | (200 + 46.7) ÷ 28.7 | 8.6% |
210 | (210 + 46.7) ÷ 28.7 | 9.0% |
220 | (220 + 46.7) ÷ 28.7 | 9.3% |
230 | (230 + 46.7) ÷ 28.7 | 9.6% |
240 | (240 + 46.7) ÷ 28.7 | 10.0% |
250 | (250 + 46.7) ÷ 28.7 | 10.3% |
260 | (260 + 46.7) ÷ 28.7 | 10.6% |
270 | (270 + 46.7) ÷ 28.7 | 11.0% |
280 | (280 + 46.7) ÷ 28.7 | 11.3% |
290 | (290 + 46.7) ÷ 28.7 | 11.6% |
300 | (300 + 46.7) ÷ 28.7 | 12.1% |
Blood Sugar to A1C Chart
A1C (%) | Average Blood Sugar (mg/dL) |
---|---|
5.0 | 97 |
5.5 | 111 |
6.0 | 126 |
6.5 | 140 |
7.0 | 154 |
7.5 | 169 |
8.0 | 183 |
8.5 | 197 |
9.0 | 212 |
9.5 | 226 |
10.0 | 240 |
Blood Sugar to A1C Conversion Formula
The A1C and average blood glucose follows this formula:
A1C = (Average Blood Glucose + 46.7) ÷ 28.7
To find average blood glucose from A1C: Average Blood Glucose = (28.7 × A1C) – 46.7
For an average blood glucose of 130 mg/dL: A1C = (130 + 46.7) ÷ 28.7 = 6.16%
How to Convert Blood Sugar to A1C?
Converting blood sugar to A1C involves these steps:
- Collect multiple blood glucose readings over time
- Calculate the average of these readings
- Apply the conversion formula
- Round to the nearest tenth percentage
Let’s say your blood glucose readings over three months are: Morning: 120, 130, 125 Afternoon: 140, 135, 128 Evening: 145, 138, 132
Average = (120+130+125+140+135+128+145+138+132) ÷ 9 = 132.56 mg/dL A1C = (132.56 + 46.7) ÷ 28.7 = 6.24%
What Does a 7.0 A1C Equal in Blood Sugar?
An A1C of 7.0% corresponds to an average blood glucose level of approximately 154 mg/dL.
Using the formula:
Average Blood Glucose = (28.7 × 7.0) – 46.7
= 200.9 – 46.7
= 154.2 mg/dL
What is My A1C if My Blood Sugar is 115?
For an average blood sugar of 115 mg/dL:
A1C = (115 + 46.7) ÷ 28.7
= 161.7 ÷ 28.7
= 5.63%
This indicates good glycemic control, as it falls within the normal range of under 5.7%.
What is a 6.3 A1C Level of Blood Sugar?
An A1C of 6.3% converts to an average blood glucose of:
Average Blood Glucose = (28.7 × 6.3) – 46.7
= 180.81 – 46.7
= 134.11 mg/dL
What is My A1C if My Average Blood Sugar is 140?
For an average blood sugar of 140 mg/dL:
A1C = (140 + 46.7) ÷ 28.7
= 186.7 ÷ 28.7
= 6.5%
References
- American Diabetes Association: https://www.diabetes.org/diabetes/a1c
- National Institute of Diabetes and Digestive and Kidney Diseases: https://www.niddk.nih.gov/health-information/diabetes/overview/tests-diagnosis/a1c-test
- Mayo Clinic: https://www.mayoclinic.org/tests-procedures/a1c-test/about/pac-20384643
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