A VERY, and I must emphasize the very, crude way to calculate basal is as follows.
First we must find you Total Daily Dose (TDD) which is in the range of your weight in kg divided by 2 to your weight in kg. We’ll say you’re 140kg so your total dose would be 70-140 units.
Basal insulin, once again in a crude sense, is about half of that. So we would expect you to take ~35-70 units of Tresiba.