How this fasting blood sugar conversion is calculated
General formula: mg/dL ÷ 18 = mmol/L
- 1. Start with the value in mg/dL: 100.
- 2. Divide by the analyte-specific factor: 100 ÷ 18.
- 3. Result in mmol/L: ≈ 5.555555555555555.
mg/dL to mmol/L calculator for Fasting Blood Sugar (FBS)
Use this page to convert fasting blood sugar (fbs) between mg/dL and mmol/L with the correct factor for this test.
Adjust this value and explore nearby conversions
You landed here from a value-specific search. You can change the number, switch mmol/L ↔ mg/dL, or pick another analyte while keeping the same conversion engine.
Conversion settings
Standard conversion for this test between mmol/L and mg/dL.
⇄
—
Conversion factor: 1 mmol/L ≈ 18 mg/dL
Tips and important notes for fasting blood sugar
- Fasting blood sugar is measured after an overnight fast with only water allowed.
- One single fasting value is only a snapshot; trends over time matter more.
- Always interpret fasting results with your own doctor, especially if you are on treatment.