Blood Glucose 7 tested - mmol/L or mg/dL?
Most meters outside the US show mmol/L. A reading of 7 is far more likely to be 7 mmol/L than 7 mg/dL.
If it is 7 mmol/L
= 126 mg/dL. Fasting without diabetes: Diabetes range · With diabetes before a meal: In target
Full explanation for 126 mg/dL →If it really is 7 mg/dL
That is 0.4 mmol/L — severely low, below the level 2 hypoglycemia threshold of 54 mg/dL (3.0 mmol/L). Most meters show "LO" below 20 mg/dL. If the person is shaky, sweaty, confused or drowsy, treat it as a severe low: 15–20 g of fast-acting carbohydrate if they can swallow safely; if not, glucagon if available, recovery position and call 911 (US) or your local emergency number.
Full explanation for 7 mg/dL →Not urgent — but follow up
- Without diabetes: as a fasting reading this is in the diabetes range — ask your doctor for a repeat fasting test or an HbA1c. One reading is not a diagnosis.
- With diabetes: in target — nothing to change.
- Note the time and whether you had eaten — the same number means different things fasting and after a meal.
If you don't have diabetes — reading 7 mmol/L (126 mg/dL)
Fasting, 7 mmol/L (126 mg/dL) is in the diabetes range (7.0 mmol/L = 126 mg/dL or higher). After a meal it is still normal (below 7.8 mmol/L = 140 mg/dL). One reading is not a diagnosis: diabetes is confirmed with a repeat test or an HbA1c of 6.5% or more.
Fasting prediabetes cut-off: the ADA uses 5.6 mmol/L (100 mg/dL); the WHO uses 6.1 mmol/L (110 mg/dL). This site follows the ADA.
Fasting (8+ hours without food)
Diabetes range2 hours after eating (or glucose tolerance test)
NormalIf you have diabetes — reading 7 mmol/L (126 mg/dL)
7 mmol/L (126 mg/dL) is in target both before and after meals for most adults with diabetes (pre-meal 4.4–7.2 mmol/L = 80–130 mg/dL, after meals below 10.0 mmol/L = 180 mg/dL).
Before a meal / fasting
In target1–2 hours after a meal
In targetTargets for most non-pregnant adults (American Diabetes Association (ADA) Standards of Care). Your own targets may be different — for example in pregnancy, for children, older adults or people prone to lows. See pregnancy targets.
126 mg/dL as an average: HbA1c 6.0%
If 126 mg/dL were your average glucose over two to three months, it would match an HbA1c of about 6.0% (prediabetes range, 5.7–6.4%). A single reading says little about your HbA1c — it is the long-term average that counts. Learn more in how to measure blood sugar.
Make sure the number is right
- Wash and dry your hands before a finger-stick: fruit juice or sugar on the skin can raise the result a lot.
- Home meters may differ from a lab value by up to about 15%. At 126 mg/dL that means roughly 107–145 mg/dL.
- CGM sensors measure tissue fluid and lag 5–15 minutes behind blood when glucose changes quickly — confirm lows with a finger-stick.
Check another reading
Nearby values
Sources: ADA Standards of Care · ADAG study (HbA1c and average glucose) · WHO: Definition and diagnosis of diabetes · MedlinePlus: Blood glucose test
This page explains one reading in general terms. It is not a diagnosis or a treatment instruction. Follow the plan agreed with your doctor or diabetes team.