Blood glucose level range

What’s the ‘right’ range for my BGLs?

What should my BGL be?

For a person without diabetes, throughout the day blood glucose levels (BGLs) will generally range between 4.0 – 7.8 millimoles of glucose per litre of blood (mmols/L) regardless of how they eat or exercise, or what stress they’re under.  

When you’re living with diabetes your body cannot, or finds it hard to, keep your BGLs within a healthy range.  

Because each person living with diabetes is different, your GP or specialist will set target BGLs that are right for youHowever, here is some information you can use as general guide. The information below is a general guide for target blood glucose levels before meals and after eating.  

Type 1 Diabetes 

Target Blood Glucose Levels (BGLs) 

  • Before meals: 4 to 6mmol/L 
  • 2 hours after starting meals: 4 to 8mmol/L 

Type 2 Diabetes

Target Blood Glucose Levels (BGLs) 

  • Before meals: 6 to 8mmol/L 
  • 2 hours after starting meals: 6 to 10mmol/L  

What happens when my BGLs are outside of these ranges?

An important part of blood glucose monitoring is to identify hypoglycaemia and hyperglycaemia.  

Find out more about hypoglycaemia, hyperglycaemia and ketoacidosis. 

HBA1c – the big picture on blood glucose

Your GP or specialist may request you to have HbA1c (or glycated haemoglobin) blood test. This blood test provides an average measure of your blood glucose over the previous two to three months.  

HbA1c is an important complement to selfmonitoring at home (finger prick checks). Understanding your HbA1c levels can help you and your health care team make more informed decisions about your diabetes management. Some medications, treatments and inherited blood conditions can affect HbA1c results. Your doctor should be aware of your medical history to ensure an accurate HbA1c. 

Your doctor will recommend a HbA1c target based on your life stage and particular circumstances. Usually this will be around 7% (53 mmol/mol), although this can vary depending on your personal circumstances. 

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