Blood Sugar Checker Online
Educational
Enter one blood sugar reading (fasting, before a meal or 2-hour after a meal) and see how it compares with commonly used ranges in the US, UK and internationally.
Your blood sugar interpretation
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mg/dL
Enter a value, choose when it was measured and pick a guideline style to see how it fits.
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Analysing weight, waist, labs and lifestyle factors…
Use the form on the left to enter a single blood sugar reading – for example a fasting lab result, a before-meal capillary test or a 2-hour post-meal value. This card will highlight whether the number usually falls in a usual, higher-risk / prediabetes or diabetes-range band, based on the guideline style you selected.
Typical diagnostic ranges this checker uses
For fasting values, many guidelines consider below 100 mg/dL (≈5.6 mmol/L) usual, 100–125 mg/dL
(≈5.6–6.9 mmol/L) as a prediabetes range, and 126 mg/dL (≥7.0 mmol/L) or above – confirmed on repeat –
in the diabetes range. For 2-hour post-meal / OGTT readings, below 140 mg/dL (≈7.8 mmol/L) is usually
considered normal, 140–199 mg/dL a higher-risk band, and 200 mg/dL or more in the diabetes range.
How to use this result safely
A single number is only one piece of information. Persistent readings in the prediabetes or
diabetes-range bands, especially together with symptoms or a raised A1C, should be discussed with your
doctor. They can confirm results with repeat tests, look at your full history and help you plan the
next steps.
This checker is educational only and does not replace professional medical care or emergency services.