Printable Blood Sugar mg/dl to mmol/L Conversion Chart
Author: Ian C. Langtree - Writer/Editor for Disabled World (DW)
Published: 21 Aug 2023 - Updated: 4 Sep 2026
Publication Type: Charts, Graphs, Tables
Table of Contents:
Synopsis - Definition - Overview - FAQs - Insights, Updates - Related Content
Synopsis
This information provides a printable reference chart and table for converting blood glucose readings between mg/dl and mmol/L, the two units most widely used to measure blood sugar concentration. In the United States, Germany, and several other countries, glucose is reported in mg/dl (milligrams per deciliter), while mmol/L (millimoles per liter) is the international standard, so this table offers a straightforward side-by-side reference for reading results across both systems. It applies the standard glucose conversion factor of 0.0555 and can be printed directly from the browser, making it a practical everyday tool for people managing diabetes, seniors monitoring their levels, caregivers, and anyone interpreting glucose values reported in an unfamiliar unit.
At a Glance
- 1 - A companion printable chart converts mmol/L back to mg/dl. Together they cover results reported in either unit.
- 2 - Listed values are approximate because the mg/dl figures are shortened to two decimal places with no rounding. The chart works as a quick reference rather than a precise calculator.
- 3 - Readings above roughly 400 mg/dl, or 22.2 mmol/L, mark severe hyperglycemia and would be handled as a medical emergency. Those rows appear only to complete the table, not to show typical levels.
- 4 - The chart can be sent to a printer with File then Print, or Ctrl plus P on Windows and Linux and Command plus P on Mac. The print window then lets you pick a destination and adjust settings before printing.
Topic Definition
- Blood Sugar Conversion
Blood sugar conversion is the practice of expressing the same blood glucose result in a different unit of measurement, usually moving between milligrams per deciliter (mg/dl) and millimoles per liter (mmol/L). A mg/dl figure states the weight of glucose contained in a tenth of a liter of blood and is the familiar unit in the United States, Germany, and a number of other countries, while mmol/L counts glucose molecules in a liter of blood and is the international standard used by most laboratories worldwide. One fixed factor of 0.0555 ties the two together, so multiplying a mg/dl reading by 0.0555 produces the mmol/L equivalent, and multiplying an mmol/L reading by roughly 18 works in the opposite direction. Nothing about the blood sample changes during conversion, only the scale of the number, which is why a printed chart is handy for anyone comparing a home meter, a lab report, or clinical guidance written in the other unit.
Overview
Our printable mg/dl to mmol/L table below forms part of our article on converting mg/dl to mmol/L blood sugar levels which also includes additional information on blood sugar concentration or blood glucose levels in the blood.
Blood Sugar mg/dl to mmol/L Conversion Table
*mg/dL measurements shortened to 2 decimal places with no rounding.
The conversion factor used is 0.0555, which is the standard factor for converting mg/dL to mmol/L for glucose measurements.
Note: Extremely high values (above about 400 mg/dL or 22.2 mmol/L) are considered severe hyperglycemia and would be medical emergencies in real-life situations. The higher values are included for completeness of the conversion table, but they do not represent normal or even common blood glucose levels.
How to Print the Chart
To print the above chart click "File" and then "Print". Or, use a keyboard shortcut:
Mac: Command-key + p
Windows and Linux: Ctrl + p
In the window that appears, select the destination and change your preferred print settings.
Click "Print".
Also see our Printable Blood Sugar mmol/L to mg/dl Conversion Chart
Frequently Asked Questions
How do I convert mg/dl to mmol/L in my head
Divide the mg/dl reading by 18 for a close approximation, so 90 mg/dl works out to about 5 mmol/L. The exact factor is 0.0555, which a chart or calculator handles more precisely.
How many mg/dl is 1 mmol/L of glucose
One mmol/L of glucose equals about 18 mg/dl, or 18.018 mg/dl to be exact. That relationship comes from the molecular weight of glucose, which is roughly 180 grams per mole.
Why do countries use different units for blood glucose
Millimoles per liter is the unit favored by the International System of Units because it reflects molar concentration, and most countries adopted it for laboratory reporting. Others, including the United States, kept the older mass based mg/dl convention already in use across clinical practice and meter design.
Is mg/dL the same as mg percent
Yes, the older term mg percent, sometimes written as mg pct, means milligrams per 100 milliliters, which is the same volume as a deciliter. A result of 100 mg percent is identical to 100 mg/dl.
What is a normal blood glucose range in mmol/L
For most adults without diabetes, fasting glucose sits at roughly 3.9 to 5.5 mmol/L, which converts to about 70 to 99 mg/dl. Personal targets differ, so a doctor or diabetes care team should confirm the range that suits your situation.
Which glucose levels are used to diagnose diabetes
Common diagnostic thresholds include a fasting result of 126 mg/dl or 7.0 mmol/L and above, or a two hour result of 200 mg/dl or 11.1 mmol/L and above, usually confirmed by repeat testing. Only a qualified clinician can make a diagnosis based on the full clinical picture.
Can I switch my glucose meter between mg/dl and mmol/L
Some meters allow the unit to be changed in the settings menu, while many are locked to the unit used in the country where they were sold. Checking the device manual or the manufacturer support page will confirm which applies.
Why does my lab result differ from my home meter reading
Laboratories generally test venous plasma while home meters test capillary blood from a fingertip, and the two can differ even when sampled minutes apart. Timing, recent food or fluids, and the accuracy tolerance built into consumer meters all add to the gap.
Insights, Analysis, and Developments
Editorial Note: A clear conversion chart can save a good deal of guesswork for anyone who moves between healthcare systems, travels abroad, or compares meters and lab reports that use different units. Keeping a printed copy alongside a glucose monitor or in a diabetes care kit gives a fast, dependable point of reference without the need to recalculate by hand or rely on a connected device. As always, these figures are intended to help interpret readings rather than to replace the guidance of a doctor or diabetes care team, who can weigh any individual result against a person's wider health picture.
Author Credentials: Ian is the founder and Editor-in-Chief of Disabled World, a leading resource for news and information on disability issues. With a global perspective shaped by years of travel and lived experience, Ian is a committed proponent of the Social Model of Disability, a transformative framework developed by disabled activists in the 1970s that emphasizes dismantling societal barriers rather than focusing solely on individual impairments. His work reflects a deep commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.