Blood Test Unit Converter

Medical calculator to convert blood test results between mg/dL and mmol/L. Compatible with glucose, total cholesterol, HDL, LDL, triglycerides, creatinine and urea.

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Frequently Asked Questions

What does mg/dL mean?

Milligrams per decilitre. A unit of mass concentration that indicates how many milligrams of a substance are present in 100 millilitres of blood. It is the standard in Spain, the United States and Latin America.

What does mmol/L mean?

Millimoles per litre. The International System unit for measuring substance concentration based on the number of molecules (moles) per volume. It is the standard preferred by the international scientific community and countries such as the UK or Canada.

Why is the conversion factor different for each substance?

Because the factor depends on the molecular weight of the molecule. A heavier molecule like cholesterol (MW ≈ 387 g/mol) requires a larger divisor than glucose (MW ≈ 180 g/mol). The formula is: mmol/L = mg/dL ÷ molecular weight × 10.

How do I manually convert from mmol/L to mg/dL?

Multiply the mmol/L value by the substance-specific conversion factor. For example, for glucose multiply by 18.016. For cholesterol, by 38.67. The calculator performs this calculation automatically and instantly.

Is this calculator reliable for medical diagnoses?

This tool is purely informational and uses conversion factors per IFCC guidelines. It does not replace professional diagnosis. The reference ranges shown are indicative and may vary between laboratories, ages and individual clinical circumstances. Always consult your doctor.

Blood Test Unit Converter

7 analytes: glucose, total cholesterol, HDL, LDL, triglycerides, creatinine and urea.
Bidirectional: converts from mg/dL to mmol/L and back with one click.
Clinical traffic light: visual indicator of low, normal, borderline and high ranges.
Session history: save and compare multiple values in a table.

# Complete Guide to Blood Test Unit Conversion

Blood test results can be confusing when presented in different unit systems. Medical laboratories mainly use two types: mass concentration (mg/dL) and molar concentration (mmol/L). Understanding how to convert between them is crucial for patients consulting international scientific literature or living in countries with different standards, such as the United States (mg/dL) versus most of Europe (mmol/L).

# Biochemical Conversion Factor Table

Analyte Mass unit Molar unit Conversion factor
Glucosemg/dLmmol/L18.016 (divide mg/dL)
Total Cholesterolmg/dLmmol/L38.67 (divide mg/dL)
Triglyceridesmg/dLmmol/L88.57 (divide mg/dL)
Ureamg/dLmmol/L6.006 (divide mg/dL)
Creatininemg/dLmmol/L11.312 (divide mg/dL)

# Glucose: The Body's Fuel

Glucose is the primary energy source for cells. Its measurement is fundamental for diabetes management and metabolic health. A fasting level below 100 mg/dL (5.55 mmol/L) is considered normal. Values between 100 and 125 mg/dL may indicate prediabetes, and levels above 126 mg/dL (7.0 mmol/L) on two separate tests are usually indicative of type 2 diabetes mellitus.

# Cholesterol and the Lipid Profile

Cholesterol is a waxy substance necessary for building cells and hormones, but elevated levels increase the risk of cardiovascular disease. A desirable total cholesterol level is below 200 mg/dL (5.17 mmol/L). HDL "good" cholesterol above 60 mg/dL and LDL "bad" cholesterol below 100 mg/dL are the usual targets for healthy adults.
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# How to Interpret Results Safely

  • Fasting glucose repeatedly above 100 mg/dL.
  • Total cholesterol above 240 mg/dL or LDL above 160 mg/dL.
  • Triglycerides above 200 mg/dL on a sustained basis.
  • Creatinine elevated or suddenly decreased, indicating altered kidney function.
  • Any out-of-range value confirmed in two consecutive measurements.

Bibliographic References