A1C Results Chart

By RachelChavez Latest Reply 2013-10-09 21:33:20 -0500
Started 2011-07-14 14:58:02 -0500

I was poking around on the web and I found an A1C chart. I'm not sure how accurate it was but you can check it out if you would like. http://www.diabeteschart.org/bloodsugarchart.... Would anyone be able to tell me if this is accurate or not?

15 replies

Uncle Lew
Uncle Lew 2011-10-20 18:22:41 -0500 Report

You can go to the ADA website, enter estimated Average Glucosein the search box and a chart will appear. Below the chart is a conversion device wher you can enter your A1c and get your estimated blood glucose or enter your meter number to get an estimated A1c. I keep a log of all my readings in an Excel spread sheet. When I enter my meter reading it calculates my A1c. Over the course of 21 months of reading I know to add 0.2% to my A1c and I will be exactly the results of my blood tests. I find it helps me to keep on track.
The web site you give also has the formulas for conversions. While there are various formulas for these conversions the ones shown these are the same formulas that thre ADA uses.

kdroberts 2011-10-20 18:13:13 -0500 Report

The problem with charts like this one is this

"Conversion: HbA1c = (46.7 +Plasma Glucose) / 28.7
Plasma Glucose = (28.7 * HbA1c) - 46.7"

It's very hard to accurately work something like this out with an equation in general but especially as the numbers that are only loosely related. Plus the desirable range depends on which source you ask, some professional bodies would say that under 6.5 is desirable and not under 7.

Kf6krc 2011-10-19 16:58:38 -0500 Report

looking at it looks right, I remember when I had my 1st A1c and it was off the chart and my BG was above 500. However your BG will go up and down all day long with each time you eat anything. You must also remember that you A1C is usually taken when you are fasting!

Type1Lou 2011-10-20 17:14:34 -0500 Report

The A1c test is not affected by whether you are fasting or not. It is a reflection of the average of your blood glucose levels over the past 60 to 90 days. kdroberts had a very good explanation of how A1c measures BG in a recent discussion reply…I'll see if I can find it and cite it here. See the discussion "What does the A1C test measure ?" and look for kdroberts "fish pond" explanation…it made a lot of sense and helped me understand what A1c measures..

writereel 2011-10-19 15:05:27 -0500 Report

rachel, the chart looks accurate to me. my a1c was 7.6 not to high but concerned enough that the doctor told me to change my eating habits. its hard to do when you comew home at night. got any tips.


Mas72 2011-08-04 19:21:31 -0500 Report

Rachel, the previous poster was right in indicating the chart represents an average, so an A1C of 8 represents an average sugar of 183 over 3 months. Over those 3 months blood glucose will move up and down at fasting, after meals, etc. What's more as the A1C goes down the post meals make up more of the A1C number. So at an A1C over 10 over 70% of that number depends on your fasting blood sugar, but at an A1C of 7, the post meal reading becomes a more important component. Probably way more in depth than you were hoping for…

jayabee52 2011-07-14 18:00:15 -0500 Report

Thank you for sharing, Rachel.

Of course it is not as simple as the chart may make it seem. My most recent A1c was 5.5, which according to the chart my blood glucose is 111. But when I take my BG daily it is all over the place with highs and lows. It is useful for getting an average measurement of how one is doing overall over the last 90 days. Are the numbers on the chart accurate? I will leave that to a person who is proficient in math.

camerashy 2011-07-14 17:57:23 -0500 Report

The chart seems to be as close to correct as it can be. Unfortunately, it doesn't go high enough to tell me what my average was when I started on insulin.

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