Ketones (Beta-Hydroxybutyrate) Unit Converter

In short Ketones (Beta-Hydroxybutyrate) is reported in mg/dL in some countries and mmol/L in others, and the two are related by a fixed factor: 1 mg/dL = 0.0960569 mmol/L, so to go the other way you divide by 10.4105. 5 mg/dL is 0.5 mmol/L; 15 mg/dL is 1.4 mmol/L; 30 mg/dL is 2.9 mmol/L. The factor is not arbitrary — it comes from the molar mass, because beta-hydroxybutyrate has a molar mass of 104.11 g/mol, and that is why every analyte has its own factor rather than one shared conversion. Home blood-ketone meters report mmol/L almost everywhere, including in the United States, while a hospital lab in the US may report the same analyte in mg/dL — so this is one of the few conversions people need between their own meter and their own lab report in the same country. The factor is close to 10, so mg/dL divided by 10 is a workable approximation. This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.