Ask the Diabetes Educator Archive
How accurate are home A1C test kits?
The A1C kits for home testing are reported to be fairly accurate. I do not know the percent difference as compared to a lab draw, but they will give you a close idea as to where you are for a 2-3 month period. For your own information, you can do a home test within the same 24 hour period as a lab test, and see how they compare.