How this fasting blood sugar conversion is calculated
General formula: mg/dL ÷ 18 = mmol/L
- 1. Start with the value in mg/dL: 42.
- 2. Divide by the analyte-specific factor: 42 ÷ 18.
- 3. Result in mmol/L: ≈ 2.3333333333333335.
42 mg/dL to mmol/L (Fasting Blood Sugar (FBS))
42 mg/dL fasting blood sugar (fbs) converted to mmol/L using the correct factor for this test.
42 mg/dL fasting blood sugar (fbs) is approximately 2.33 mmol/L.
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.
⇄
2.33
Conversion factor: 1 mmol/L ≈ 18 mg/dL
Nearby mg/dL values and their mmol/L equivalents
mg/dL
mmol/L
37
2.06
39.5
2.19
42
2.33
44.5
2.47
47
2.61
Nearby fasting blood sugar (fbs) conversions
Quick links for mg/dL values near 42.
39.6 mg/dL in mmol/L
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41.4 mg/dL in mmol/L
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42 mg/dL in mmol/L
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45 mg/dL in mmol/L
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46.8 mg/dL in mmol/L
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48 mg/dL in mmol/L
Convert 48 mg/dL to mmol/L
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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.