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Blood Sugar Converter

Convert glucose between mg/dL and mmol/L, and HbA1c between % and mmol/mol.

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HbA1c (optional)

Result
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Quick Tool Overview

The Blood Sugar Converter converts glucose readings between mg/dL and mmol/L, HbA1c between percent and mmol/mol, and HbA1c to estimated average glucose, showing where each value falls in the ADA reference ranges.

What it does
Converts glucose and HbA1c units
You give it
A glucose reading, its unit and when it was taken
You get back
The other unit, a reference range and eAG
Best for
Reading meters and lab reports from other countries
Converters Free, unlimited use No sign-up Runs in your browser

About the Blood Sugar Converter

Blood glucose is reported in milligrams per decilitre in the United States, India and Bangladesh, and in millimoles per litre in the UK, Europe, Canada and Australia. A reading of 7 and a reading of 126 can be exactly the same, which makes guidelines, meters and lab reports from different countries confusing.

Enter a reading in either unit and the converter gives the other, using the molar mass of glucose, and tells you where it sits in the American Diabetes Association ranges for a fasting, after-meal or random test. The HbA1c section converts between the percentage and IFCC mmol/mol forms labs use, and estimates your average glucose from it. Everything stays in your browser.

Key features of the Blood Sugar Converter

Both glucose units

mg/dL and mmol/L convert using the molar mass of glucose, 18.016.

Context-aware ranges

Fasting, two-hour and random readings are each compared with their own ADA cut-offs.

HbA1c in both forms

Percent (NGSP) and mmol/mol (IFCC) convert by the official master equation.

Estimated average glucose

The ADAG formula turns HbA1c into an average glucose in both units.

Catches unit mix-ups

A reading that looks like it was entered in the wrong unit gets a warning.

How to use the Blood Sugar Converter

  1. 1

    Enter your reading

    Type the number from your meter or lab report.

  2. 2

    Say which unit it is in

    mg/dL or mmol/L, and whether it was fasting, after eating or random.

  3. 3

    Read the conversion

    The value in the other unit appears with its reference range.

  4. 4

    Add HbA1c if you have it

    Convert between % and mmol/mol and see the estimated average glucose.

Frequently asked questions

Divide by 18 (18.016 precisely). So 126 mg/dL is 7.0 mmol/L, and 100 mg/dL is 5.6 mmol/L.

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