Hi! You can sign up for Libreview and it will give you all sorts of information and show charts.
It has a tab to hit that says AGP report. Under that it will give you TIR, Average Glucose and a GMI which is supposed to be close to your A1c. But it can be off. I have found it more accurate to look at the average glucose and use that to get a closer A1c number. But it usually won't tell you everything like GMI until it has a 7 days worth of data (if I remember correctly).
The Libre AP on the phone that you can use to scan your sensor supplies quite a bit of info. I remember being impressed by the info on it, unfortunately I haven't used that ap for a couple of years. Look for a GMI number or a AGP report. But again it wants 7 days worth to give all the information.
@Antje77 points an arrow to Geschatte A1c, but I bet in the US it says GMI as Libreview uses that instead.
On the reader, mine just gives average glucose, but you can compare that to get an estimate of A1c.
Never take the numbers as golden. My Libre always reads lower than what I am at by about 20 points plus (1.1+) , and gets closer when I am in the 80's or lower (4.4 or lower). Some people it reads higher. I use it for trends to tell me if my BG level is dropping or rising when I swim.
Two calculators to keep handy are
Convert blood sugar/glucose from mmol/L (UK standard) to mg/dl (US standard) and vice versa using our blood sugar converter.
Use this calculator to convert HbA1c to Average Blood Sugar Level. HbA1c indicates what your average blood glucose level has been in the past 30-90 days.