Convert blood glucose between mg/dL and mmol/L, plus g/L and µmol/L. Blood Sugar Converter is a free online tool from the ToolsRift Unit Converters collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
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How to use Blood Sugar Converter
Open the Blood Sugar Converter above — it loads instantly, no account needed.
Enter or upload your input. Everything is processed locally on your device.
Get your result immediately and copy or download it with one click.
Frequently asked questions
How do I convert mg/dL to mmol/L?
Divide mg/dL by 18.0182. For example, 100 mg/dL ≈ 5.55 mmol/L.
What is a normal fasting blood sugar?
Roughly 70–100 mg/dL (3.9–5.5 mmol/L); this tool is for unit conversion only, not medical advice.
Why two different glucose units?
The US uses mg/dL while most other countries use mmol/L; the conversion factor for glucose is 18.0182.
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