Blood Sugar Converter & Calculator
Convert blood sugar between mmol/L (UK standard) and mg/dL glucose (US standard) units with our blood sugar converter and calculator. You can also calculate mg/dL (US) to mmol/L (UK).
To quickly look up a conversion, you can also use our blood sugar conversion charts.
Blood Sugar Conversion Calculator
How do you convert mmol/L to mg/dL?
Our converter takes mmol/L and converts it to mg/dL using a standard formula: mmol/L * 18.0182 = mg/dL.
For example, if you have a blood sugar level of 5 mmol/L, the conversion to mg/dL would be: 5 mmol/L * 18.0182 = 90 mg/dL.
You'll find the formula we use on other sites such as:
How do you convert mg/dL to mmol/L?
Our converter takes mg/dL and converts it to mmol/L using a standard formula: mg/dL / 18.0182 = mmol/L.
For example, if you have a blood sugar level of 90 mg/dL, the conversion to mmol/L would be: 90 mg/dL / 18.0182 = 5 mmol/L.
What’s the difference between mmol/L and mg/dL?
Both mmol/L and mg/dL are units used to measure blood glucose levels, but they differ in how they express the concentration of glucose in the blood.
mmol/L (millimoles per litre) is a metric unit that measures the number of millimoles of glucose in one litre of blood (the "molarity"). It is commonly used in the UK, Europe, and many other countries.
In contrast, mg/dL (milligrams per decilitre) is a mass-based unit that measures the mass of glucose in milligrams in one decilitre of blood. It is primarily used in the United States and Japan.
Devices such as glucose meters or continuous glucose monitors may use either mmol/L or mg/dL depending on the country where they were manufactured or where they are intended for use.
Some glucose meters let you switch between units, but others are set to one unit to prevent mistakes when reading the result.
What is mmol/L?
The unit mmol/L (millimoles per liter) is based on the molecular mass of a substance being measured. When measuring blood sugar, mmol/L is the number of millimoles of glucose present in one litre of blood (serum).
mmol/L is the standard unit for blood sugar measurement in:
- United Kingdom
- Europe
- Australia
- Canada
- China
- South Africa
What is mg/dL?
The unit mg/dL is a mass-based unit. This means it measures the mass of the substance (in milligrams) per deciliter (one-tenth of a litre).
mg/dL is the standard unit for measuring blood sugar in:
- United States
- Japan
- South Korea
- Taiwan
- Israel
