Blood Test Unit Converter
Different labs, different countries, different units. Use this free tool to convert your blood test values between common measurement systems — instantly, with no signup required.
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This tool performs standard unit conversions using published conversion factors. It does not provide medical advice, diagnosis, or interpretation. Always verify values with your lab report and consult a healthcare professional.
Supported conversions
All conversion factors below are standard values used in clinical laboratory practice.
| Biomarker | Unit A | Unit B | Factor (A → B) |
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Need more than a conversion?
Upload your full blood test report and get a structured summary with reference ranges, flagged markers, and plain-language explanations.
Use conversions with context, not in isolation
Unit conversions help you compare lab reports across countries and labs. The pages below help you interpret those converted values with ranges, report examples, and focused guides.
Explainer
Blood test results explained
Learn how to read high, low, and normal values once you have converted a biomarker into the unit you know best.
HbA1c
HbA1c result guide
Useful when converting HbA1c between NGSP percent and IFCC mmol/mol formats from different labs.
Kidney function
Creatinine and eGFR explained
Helpful when creatinine needs converting between mg/dL and µmol/L before you compare kidney results.
Tool
HOMA-IR calculator
Move from converted glucose values to a quick insulin resistance estimate when fasting insulin is also available.
Frequently Asked Questions
- Why do blood test units differ between countries?
- The United States primarily uses conventional units (mg/dL, g/dL), while most other countries use SI units (mmol/L, µmol/L, g/L). Both systems are scientifically valid — the difference is historical, not medical. This can be confusing when comparing results from labs in different countries.
- What is the conversion factor for glucose?
- To convert glucose from mg/dL to mmol/L, multiply by 0.05551. For example, 100 mg/dL equals approximately 5.6 mmol/L. To go in the other direction, divide by 0.05551.
- Is this converter accurate?
- This converter uses the same standard conversion factors used in clinical laboratory practice. The math is straightforward multiplication or division. However, always verify converted values against your original lab report.
- What is the difference between mg/dL and mmol/L?
- mg/dL (milligrams per deciliter) measures the weight of a substance in a given volume of blood. mmol/L (millimoles per liter) measures the number of molecules. They express the same measurement in different ways, and the conversion factor depends on the molecular weight of the specific substance.
- Can I convert HbA1c between % and mmol/mol?
- Yes. This tool supports the NGSP (%) to IFCC (mmol/mol) conversion using the standard formula: mmol/mol = (% × 10.929) − 23.5. For example, an HbA1c of 7.0% equals approximately 53 mmol/mol.
- Does this tool store my data?
- No. All conversions happen entirely in your browser. No values are sent to any server, stored, or logged.
Want your full report analyzed?
Upload your blood test and get a structured, doctor-ready summary with all units, ranges, and explanations included.