Blood Sugar Calculator — mg/dL to mmol/L Converter
Convert blood glucose levels between mg/dL and mmol/L instantly. See your reading against fasting, pre-meal, and post-meal normal ranges.
126
mg/dL
7.0
mmol/L
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Status
Blood Glucose Reference Ranges
| Measurement | Normal (mg/dL) | Normal (mmol/L) | Your Reading |
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Frequently Asked Questions
What is the normal blood sugar level?
Normal fasting blood sugar is 70–99 mg/dL (3.9–5.5 mmol/L). Pre-diabetes is 100–125 mg/dL (5.6–6.9 mmol/L). Diabetes is diagnosed at 126 mg/dL (7.0 mmol/L) or higher on two occasions. Post-meal (2 hours after eating) normal is below 140 mg/dL (7.8 mmol/L).
How do you convert mg/dL to mmol/L?
Divide the mg/dL value by 18 to get mmol/L. For example: 126 mg/dL ÷ 18 = 7.0 mmol/L. To convert back, multiply mmol/L by 18. The formula: mmol/L = mg/dL ÷ 18.0182.
What blood glucose meter units are used in Nigeria?
Most blood glucose meters sold in Nigeria report results in mg/dL. However, some imported meters (especially from the UK) report in mmol/L. Check your meter's display — it will show either 'mg/dL' or 'mmol/L' on screen or in the manual.
What is a dangerous blood sugar level?
Blood sugar below 70 mg/dL (3.9 mmol/L) is hypoglycemia (too low) and requires immediate action — eat or drink fast-acting sugar. Blood sugar above 300 mg/dL (16.7 mmol/L) is severe hyperglycemia and needs urgent medical attention. Above 600 mg/dL can be life-threatening.
How often should diabetics check blood sugar?
Type 1 diabetics typically check 4–10 times daily. Type 2 diabetics on insulin check 2–4 times daily. Type 2 on oral medication may check 1–2 times daily or as directed by their doctor. Continuous glucose monitors (CGMs) have simplified monitoring for many patients.