Health Tools

Blood Sugar Converter

Convert between mg/dL and mmol/L with health interpretation

Last reviewed: How we build & verify

Normal fasting: < 100 mg/dL (5.6 mmol/L)

Pre-diabetic: 100-125 mg/dL (5.6-6.9 mmol/L)

Diabetes range: ≥ 126 mg/dL (7.0 mmol/L)

Low (hypoglycemia): < 70 mg/dL (3.9 mmol/L); very low < 54 mg/dL (3.0 mmol/L)

Ranges apply to a fasting (8+ hours) plasma glucose in adults; a single result does not diagnose diabetes, and post-meal or random values are interpreted differently. Educational information, not medical advice.

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Frequently Asked Questions

No. Blood Sugar Converter is free, with no signup required, and nothing you enter leaves your browser.

Blood Sugar Converter is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.

Blood Sugar Converter | ExaCalc