what range is blood sugar levels

Blood sugar levels vary depending on whether you are fasting, have eaten recently, or have diabetes. Here are the general ranges:

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

After eating (postprandial), blood sugar levels typically rise and should be:

• Normal: Less than 140 mg/dL (7.8 mmol/L)
• Prediabetes: 140–199 mg/dL (7.8–11.0 mmol/L)
• Diabetes: 200 mg/dL (11.1 mmol/L) or higher

For people with diabetes, target blood sugar levels are often individualized but generally:

• Before meals: 80–130 mg/dL (4.4–7.2 mmol/L)
• 1-2 hours after meals: Less than 180 mg/dL (10.0 mmol/L)

Always consult your healthcare provider for personalized targets and management.