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

Multiply the mmol/L value by 18.02. For example, 5.5 mmol/L × 18.02 ≈ 99 mg/dL. To go back, divide mg/dL by 18.02. The calculator does this instantly for glucose, cholesterol, creatinine and other analytes.

How do I convert HbA1c from percent to mmol/mol?

It’s not a simple factor but an equation: mmol/mol = (HbA1c% − 2.15) × 10.929. For example, 6.5% ≈ 48 mmol/mol. Percent is the NGSP system, mmol/mol is IFCC; the calculator converts both ways.

Why do reports use different units?

It’s historical: SI units (mmol/L) are used in Russia, Europe and most countries, while “conventional” units (mg/dL) are used in the US and some apps. The value is the same, only the notation differs — which is why a converter helps you compare results.

Does conversion change the reference range?

No. Conversion is just a different notation of the same result. The reference range depends on the analyte, method and lab and is given on the report in the same units as the result. Always check against your own report’s reference.

Lab unit converter: mmol/L ↔ mg/dL

Pick an analyte, enter a value — the calculator converts it between SI units (mmol/L, µmol/L) and “conventional” units (mg/dL) common in foreign reports and apps. For HbA1c — conversion between percent (NGSP) and mmol/mol (IFCC). Factors are fixed, no rough rounding.

Convert units

Pick an analyte and enter a value — the conversion appears instantly.

Why convert lab units

The same analyte is measured in different units across countries and labs. Russia and Europe mostly use SI (glucose in mmol/L); the US and some apps use “conventional” units (glucose in mg/dL). So one result looks like “5.5” or “99” — easy to get confused.

The converter removes the confusion: it converts the value back and forth by the exact molecular factor, not a rough estimate.

How the conversion works

For most analytes it’s multiplication by a fixed factor based on the substance’s molecular weight. For example, glucose: mg/dL = mmol/L × 18.02; cholesterol: × 38.67; creatinine: µmol/L ÷ 88.42 = mg/dL.

HbA1c is a special case: conversion between percent (NGSP) and mmol/mol (IFCC) uses a linear equation IFCC = (NGSP − 2.15) × 10.929, not a simple factor.

A note on reference ranges

Converting units does not change the meaning of the result — only how it’s written. The reference range depends on the analyte, method and lab, so always check it against your report. The calculator only helps you see “how much that is in familiar units”.

If you want to understand what the numbers mean, upload your labs to our service — AI explains every value.

Frequently asked questions

Multiply the mmol/L value by 18.02. For example, 5.5 mmol/L × 18.02 ≈ 99 mg/dL. To go back, divide mg/dL by 18.02. The calculator does this instantly for glucose, cholesterol, creatinine and other analytes.
It’s not a simple factor but an equation: mmol/mol = (HbA1c% − 2.15) × 10.929. For example, 6.5% ≈ 48 mmol/mol. Percent is the NGSP system, mmol/mol is IFCC; the calculator converts both ways.
It’s historical: SI units (mmol/L) are used in Russia, Europe and most countries, while “conventional” units (mg/dL) are used in the US and some apps. The value is the same, only the notation differs — which is why a converter helps you compare results.
No. Conversion is just a different notation of the same result. The reference range depends on the analyte, method and lab and is given on the report in the same units as the result. Always check against your own report’s reference.

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This calculator is for informational reference. Unit conversion does not replace interpretation by a doctor; check the norm against your lab report.