Nursing guide
Exam-focused context for this calculator. For clinical care, follow orders, policies, and local protocols.
SI units (for example mmol/L) are used in many countries and exams, while conventional units (for example mg/dL) are common in the United States. Values must be clearly labelled to prevent unit errors.
Multiply the mmol/L value by 18. For example, 7.5 mmol/L × 18 = 135 mg/dL.
Divide the µmol/L value by 88.4. For example, 88.4 µmol/L ÷ 88.4 = 1.0 mg/dL.
They are equal only for monovalent ions such as sodium, potassium, chloride, and bicarbonate. They are not universally interchangeable for all substances.
BUN and urea are different labels for related values. BUN in mg/dL equals urea in mmol/L multiplied by about 2.8, so they should not be swapped without converting.
No. It is for education only and must not be used for real dosing or to verify high-alert medication orders, which follow the MAR, order, pharmacy label, and policy.
These answers are for nursing education and exam practice only and do not provide patient-specific medical advice.
Safety
Education only. Do not use this converter for real medication dosing or to verify high-alert medication orders. Lab reference ranges vary by laboratory, age, pregnancy status, clinical context, and country. Always label SI and conventional values clearly to prevent unit errors.
Want more practice?
Pair unit conversions with the lab values guide and medication math practice.
