Health category
Fitness, nutrition, pregnancy, sleep, and wellness calculators.
Blood Sugar Converter
Convert blood sugar readings between mg/dL and mmol/L using the standard glucose conversion factor.
Converted value
5.56 mmol/L
How to Use
- Choose whether you are converting from mg/dL to mmol/L or from mmol/L to mg/dL so the result matches the units used by your meter, lab report, or care team.
- Enter the glucose reading exactly as reported. Small number differences matter, so it is worth copying the value carefully before converting.
- Review the converted result and keep the unit label with it. The number alone can be misleading if the receiving person expects the other unit system.
- Use the converted value when logging readings, comparing older lab reports, or reading medical guidance written for a different country or device standard.
- This tool is for unit conversion only. If the reading seems unusually high or low, rely on your clinician's guidance or urgent care instructions rather than the converter itself.
Frequently Asked Questions
Why are there two blood sugar units?
Different countries, labs, and glucose monitors commonly report blood sugar in either mg/dL or mmol/L. The underlying reading is the same measurement concept, but the unit system changes how the number is displayed.
What conversion factor is used?
Glucose readings convert using the standard factor of 18 between mg/dL and mmol/L. Dividing mg/dL by 18 gives mmol/L, while multiplying mmol/L by 18 gives mg/dL.
Can this tool diagnose diabetes or interpret my reading?
No. This converter only changes units. It does not determine whether a reading is normal, dangerous, fasting, post-meal, or diagnostic in a medical sense.
Should I round the converted result?
Many people round mmol/L to one decimal place and mg/dL to the nearest whole number, but exact formatting depends on the app, meter, or clinical context where you are recording the value.
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