You can’t easily work out your correction ratio if you’re doing both carbs and correction at the same time. So you need to start with a good BG before a meal (ie no correction), and get the carb ratio right first.
To get the correction ratio, do a correction at least 2 hours after eating, and 2 hours before eating again ie no eating or other insulins 2 hours either side.
Think of it like a science experiment – only change one thing at a time!
See our guides Calculating your carbohydrate ratio and Calculating your correction ratio
