The general guideline is that you don't want it to be higher than 2mm/l above your pre-breakfast reading.
Ideally to get an idea of where you need it to be, you should test before you eat and then again 2 hours after you take the first bite. If the second reading is more than 2mm/l higher than the first, then the likelihood is that your breakfast contained more carbs than you can cope with atm, and you should look to cut down a bit. If not you're probably ok.
Hi @Squeak58
While 8.2 at the 2hrs post prandial time is higher than most of us would like, how good or bad it is really depends upon what the reading was just before that meal.
What most of us aim for ( but don't always achieve) is a rise from just before a meal to 2hrs after first bite of no more than 2.0 mmol .
Then once that is being achieved, to aim to limit that maximum 2hr post prandial readings to a reading of 8.0 mmol, not just a rise of 2.0 mmol from before that meal.
For example For somebody starting to control their BG, a reading of 8.2 2hrs after Breakfast (or any other meal) may be quit good it the level just before the meal was already as high as 7.5. Since that would mean that the meal only made the BG rise by 0.7 mmol - which is very good even if 8.2 is a little high.
Normal blood sugar ranges and blood sugar ranges for adults and children with type 1 diabetes, type 2 diabetes and blood sugar ranges to determine diabetes.
www.diabetes.co.uk
A larger than desired increase 2 hours after a meal suggests eating too many carbs for your own body to handle.