I’ve been looking at my carbs and would like to know the minimum and maximum carbs you could have in one meal for a Adult . I believe I know the calories should be 450 is this true.
Not really, as the amounts depend very much on the individual and on whether they want to lose or gain weight. (Yes, some T2s are underweight). eg a slim marathon runner probably needs more calories than an obese person who is sitting at home all day. And the carb allowance is also very much dependent on your personal metabolism,
I see from your previous posts that you are T2.
Most T2s here who control their blood sugars by low carb use a glucometer to see whether the food they eat for a particular meal has too may carbs for them. (A common benchmark used is to test immediately before a meal and then 2 hours after. If your levels have gone up by more then 2mmol/L you may want to reconsider the content of the meal. )
If you tell us a little more about yourself (how long have you been diabetic, whether you want to lose weight, what was your most recent hba1c?) some of the T2s on here may be able to give you more targeted advice.
Oh, and as far as I know, there is no minimum for the carbs, though if you are on certain medications you may need to be careful about lowering your blood sugars too far if you reduce your carb intake very dramatically.