A blood glucose or blood sugar chart classifies the ideal blood sugar levels throughout the day, including before and after meals. Blood sugar charts help those with diabetes self-monitor and calculate their blood sugar test results.
Monitoring blood sugar levels is a crucial part of managing diabetes.
Most of the blood sugar charts show recommended levels as a range, allowing for differences among individual people.
The following blood sugar charts have been taken as a reference from The American Diabetes Association (ADA), Joslin Diabetes Center (JDC), and American Association of Clinical Endocrinologists (AACE).
Time of check |
Blood sugar levels for those without diabetes |
Target blood sugar levels for those with diabetes |
Fasting (before breakfast) | less than 100 mg/dL | 80 – 130 mg/dL (ADA) 70-130 mg/dL (JDC) less than 110 (AACE) |
Before meals | less than 110 mg/dL | 70-130 mg/dL (JDC) |
2 hrs. After meal 1-2 hrs. After meal |
less than 140 mg/dL | less than 180 mg/dL (ADA & JDC) less than 140 (AACE) |
Bedtime | less than 120 mg/dL | between 90 – 150 mg/dL (JDC) |
A1C levels | less than 5.7 percent | less than 7 percent |
Blood Sugar Meter Readings
Blood Sugar readings vary from person to person. A good blood sugar level for one person may be high or low for another.
Blood sugar level |
Excellent |
Good |
Acceptable |
Before meal | 72 – 109 mg/dL | 110 – 144 mg/dL | 145 – 180 mg/dL |
2 hours after meal | 90 – 126 mg/dL | 127 – 180 mg/dL | 181 – 234 mg/dL |
Gestational Diabetes Levels
For women suffering from gestational diabetes, the blood sugar recommendations are different from people with Type 1 and Type 2.
Time of check |
Blood sugar level in mg/dL |
Fasting or before breakfast | 60 – 90 mg/dL |
Before meals | 60 – 90 mg/dL |
1 hour after meal | 100 – 120 mg/dL |
People with high or low blood sugar should be worried.
Fasting blood sugar level |
Risk level and suggested action |
50 mg/dL or less | Dangerously low, seek medical attention |
70 – 90 mg/dL | Possibly too low, get sugar if experiencing symptoms of low blood sugar or see a doctor |
90-120 mg/dL | Normal range |
120-160 mg/dL | Medium, see a doctor |
160 – 240 mg/dL | Too high, work to lower blood sugar levels |
240-300 mg/dL | Too high, a sign of out of control diabetes, see a doctor |
300 mg/dL or above | Very high, seek immediate medical attention |
Diabetes is becoming common amongst children and young adults. As a parent, you need to know the normal and acceptable range of blood sugar levels in children.
Age of Child (Years) |
Before Meals |
Bedtime/Overnight |
A1C Test |
Under 6 years | 100-180 mg/dl | 110-200 mg/dl | 7.5% – 8.5% |
6 to 12 years | 90-180 mg/dl | 100-180 mg/dl | Less than 8% |
13 to 18 years | 90-130 mg/dl | 90-150 mg/dl | Less than 7.5% |
There is always a way to control and reduce blood sugar levels as long as the levels have not reached the critical stages.