what is the range of fasting blood sugar

Fasting blood sugar levels are typically measured after not eating for at least 8 hours. The ranges are as follows:

• Normal: 70–99 mg/dL (3.9–5.5 mmol/L)
• Prediabetes: 100–125 mg/dL (5.6–6.9 mmol/L)
• Diabetes: 126 mg/dL (7.0 mmol/L) or higher on two separate tests

These ranges help diagnose prediabetes and diabetes. If your fasting blood sugar is consistently high, consult a healthcare provider for further evaluation and management.