mmol/L to mg/dL Converter
5.5 mmol/L glucose is 99.1 mg/dL, and 100 mg/dL is 5.5499 mmol/L. This glucose converter switches between mmol/L and mg/dL with the glucose factor of 18.0182. It is for blood glucose only. Cholesterol uses a different factor, so do not use this tool for total, LDL, or HDL cholesterol.
Quick answer
For glucose, 1 mmol/L equals 18.0182 mg/dL.
Glucose uses the factor 18.0182. Cholesterol does not. Total, LDL, and HDL cholesterol use a different factor, about 38.67.
This tool converts units only. It does not tell you whether a glucose result is normal or how to treat it.
What this tells you
- •For glucose, 1 mmol/L equals 18.0182 mg/dL.
- •To convert mmol/L to mg/dL, multiply by 18.0182.
- •To convert mg/dL to mmol/L, divide by 18.0182.
- •Cholesterol uses a different factor, about 38.67, so this calculator is glucose only.
How to Use
- 1Enter the glucose value you want to convert.
- 2Choose the direction, mmol/L to mg/dL or mg/dL to mmol/L.
- 3Click Convert to see the converted glucose value.
- 4If you are converting cholesterol, stop and use the correct cholesterol factor instead.
How It Works
Formula
Glucose mg/dL = glucose mmol/L × 18.0182
Glucose mmol/L = glucose mg/dL ÷ 18.0182Blood glucose uses a fixed molecular-weight conversion. Multiply by 18.0182 to move from mmol/L to mg/dL, or divide by 18.0182 to go the other way. This factor is for glucose only. Cholesterol values use a different factor and cannot share this formula.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 5.5 mmol/L glucose to mg/dL
Multiply 5.5 by 18.0182 to get 99.1001 mg/dL, which rounds to 99.1 mg/dL.
Convert 100 mg/dL glucose to mmol/L
Divide 100 by 18.0182 to get 5.54994394557 mmol/L, which rounds to 5.5499 mmol/L.
Common Glucose Unit Conversions
Quick glucose lookups using the glucose factor of 18.0182.
| mmol/L | mg/dL |
|---|---|
| 4.0 | 72.1 |
| 5.0 | 90.1 |
| 5.5 | 99.1 |
| 7.0 | 126.1 |
| 10.0 | 180.2 |
This table is for glucose only. Total, LDL, and HDL cholesterol use a different factor, about 38.67.
Common mistakes
- Using the glucose factor for cholesterol results. Cholesterol needs a different factor.
- Rounding too early, especially when converting mg/dL to mmol/L.
- Treating a converted value as a diagnosis instead of a unit change.
Limitations
This tool converts glucose units only. It does not tell you whether a result is normal, fasting, post-meal, capillary, venous, or appropriate for your personal treatment plan. Cholesterol values use a different factor, about 38.67, and should not be converted with this calculator.