The sugar carried in your blood as fuel for your cells: measured in mg/dL or mmol/L.
Blood glucose is the amount of sugar circulating in your bloodstream at a given moment, the body's main quick-access energy source. It rises after eating carbohydrate and falls as insulin moves that glucose into cells.
It's reported in mg/dL (common in the US) or mmol/L (most of the rest of the world); the two differ by a factor of about 18. Keeping it within a target band most of the day is the goal behind time in range.
Learn what the reference numbers mean, then track your own logged readings and their share in your selected range. GMI and estimated A1C are withheld when source and coverage are unvalidated.
Educational content maintained by the SteadyRange. Source and terminology check: September 30, 2026. Independent clinical review is pending; no clinical reviewer credentials are claimed.