What is the glucose range that Lingo shows? June 24, 2024 13:42 Updated Lingo displays a range of glucose values from 55 to 200 mg/dL (3.1-11.1 mmol/l). Related articles Can I use Lingo if I'm on Insulin? How can I contact customer support? Do you offer a money back guarantee? My package is missing an item. Can I get help? Can I use Lingo if I have problematic hypoglycemia?