Lab Units Converter
Convert blood test results between mg/dL and mmol/L (and other SI units) instantly.
Results are estimates for informational purposes only and do not constitute financial, legal, or medical advice.
Blood test results are reported in different units depending on the country and laboratory: the US typically uses conventional units like mg/dL, while most of Europe, Canada and Australia use SI units like mmol/L. This free calculator converts common lab values — glucose, total/LDL/HDL cholesterol, triglycerides, creatinine, urea, uric acid, calcium, vitamin D and vitamin B12 — instantly between both systems.
This tool performs a pure unit conversion using standard published conversion factors. It does not interpret your results, compare them to reference ranges, or provide any medical assessment. Always discuss your lab results with a doctor or your laboratory's reference ranges, since normal ranges can vary by lab, age, sex and health status.
Frequently Asked Questions
Why do lab results use different units in different countries?
The US mostly uses "conventional units" (mass per volume, like mg/dL), while most other countries follow the SI system with molar units (like mmol/L), which measure the actual number of molecules rather than their weight.
How do I convert glucose from mg/dL to mmol/L?
Multiply the mg/dL value by 0.0555. For example, a fasting glucose of 100 mg/dL equals 5.55 mmol/L.
How do I convert cholesterol from mg/dL to mmol/L?
Multiply by 0.0259 for total, LDL and HDL cholesterol. For example, 200 mg/dL total cholesterol equals 5.18 mmol/L.
What is the conversion factor for triglycerides?
Multiply mg/dL by 0.0113 to get mmol/L. A triglyceride level of 150 mg/dL equals 1.7 mmol/L.
How is creatinine converted between units?
Multiply mg/dL by 88.4 to get µmol/L. For example, a creatinine of 1.0 mg/dL equals 88.4 µmol/L.
Are these conversion factors medically accurate?
Yes, they are the standard published molar mass conversion factors used in clinical chemistry worldwide. However, this calculator only converts units — it does not evaluate whether a value is normal or abnormal.
Can I use this for vitamin D and vitamin B12 results?
Yes. Vitamin D (25-OH) converts between ng/mL and nmol/L using a factor of 2.496, and vitamin B12 converts between pg/mL and pmol/L using a factor of 0.738.
Why doesn't the calculator tell me if my result is normal?
Reference ranges depend on the specific laboratory, testing method, your age, sex, and sometimes fasting status. Only your doctor or the lab report itself can tell you whether a converted value falls within a healthy range for you.
Can I convert in both directions?
Yes. Enter a value in either the conventional or the SI unit field and the calculator instantly updates the other field.
Is this calculator a substitute for medical advice?
No. It is strictly a unit conversion tool. Always interpret lab results together with a qualified healthcare professional.