Conversion Chart for Blood Sugar Levels: mg/dL to mmol/L

Here is a simple conversion chart for blood sugar levels that you can use for reading your diabetes blood test results. This table is meant for fasting blood glucose, ie. readings taken after fasting for a minimum of 8 hours.

*** 18 mg/dL of blood glucose = 1 mmol/L of blood glucose

Fasting Blood Sugar Range	mg/dL	mmol/L
Hypoglycemia (low blood sugar)	30 40 50 60 70	1.7 2.2 2.8 3.3 3.9
Normal Blood Sugar	70 80 90 100	3.9 4.4 5.0 5.5
Pre-Diabetic Range	101 110 120 125	5.6 6.1 6.7 6.9
Diabetic Range	126 140 155 160 175 190 200 250 300 400 600	7.0 7.8 8.6 8.9 9.7 10.6 11.1 13.9 16.7 22.2 33.3

Note that in Canada, there's a higher allowable reading for a normal fasting blood sugar level. A fasting blood glucose reading of 6.1 mmol/L (110 mg/dl) or less is considered normal. The pre-diabetic range is more than 6.1 mmol/L to 6.9 mmol/L (> 110 mg/dl to 125 mg/dl).

While this conversion chart for blood sugar levels is a good guideline, everyone's body responds differently. Work with your doctor to set realistic goals for you specifically. If you've only tried exercise and dietary changes to treat Type 2 diabetes, but these changes aren't working to keep your blood glucose under control, then it's time to have a chat with your doctor about starting medication. Diabetes has long-term effects on health and keeping it well-managed is critical to feeling well.