The body naturally tightly regulates blood glucose levels (with the help of insulin that is secreted by pancreas) as a part of metabolic homeostasis.
If blood sugar levels are either increased or decreased by a greater margin than expected this might indicate a medical condition.
What is blood sugar?
What is diabetes?
Blood sugar levels chart
Normal blood sugar levels
Low blood sugar levels
High blood sugar levels
Fasting blood sugar levels
Children blood sugar levels
Levels and indication
How to check blood sugar?
How to lower blood sugar level?
Can diabetes be cured?
What does it mean when someone refers to the blood sugar level in your body? Blood sugar level (or blood sugar concentration) is the amount of glucose present in your blood. A normal blood glucose level for a healthy person is somewhere between 65 mg/dl (3.6 mmol/l) and 105 mg/dl (5.8 mmol/l). It, of course, depends on every individual alone.
Typical symptoms of diabetes are thirst, frequent urination and unexpected weight loss. Sometimes a patient may also have impaired vision, itching skin, experience fatigue, have increased appetite, have skin infections, feel dizzy and dehydrated.
Type 1 diabetes symptoms are severe and last for a short time before the disease is diagnosed. Type 2 diabetes symptoms appear slowly and are usually unrecognizable or absent.
Use this tool to convert blood sugar values.
A normal blood sugar level is between 3.6 and 5.8 mmol/l (65 and 105 mg/dl) for a healthy person.
The concentration of glucose in the blood of healthy people in the morning on an empty stomach is between 68 and 108 mg/dl (3.8 to 6.0 mmol/l). Two hours after consuming foods or drinks rich in carbohydrates, the values are usually between 120 and 140 mg/dl (6.7 to 7.8 mmol/l).
For children up to 6 years old, the target blood sugar level before eating should be between 5.5 mmol/l (100 mg/dl) and 10 mmol/l (180 mg/dl). Before going to bed, values should be between 6.1 mmol/l (110 mg/dl) to 11.1 mmol/l (200 mg/dl).
From ages 6 to 12, before eating, glucose levels should be between 5 mmol/l (90 mg/dl) and 10 mmol/l (180 mg/dl) and between 5.5 mmol/l (100 mg/dl) and 10 mmol/l (180 mg/dl) before going to bed. Children age 13 to 19 should expect similar readings as those of adults.
Click on the image below to get a larger chart.
Blood glucose levels chart displays possible levels of blood sugar.
The chart below summarizes blood sugar level values. Values are in mmol per liter, mmol/l and in mg/dl. This chart is not 100% accurate. Consult your doctor for more information.
You can also download your own blood sugar levels log below:
>> blood sugar levels log.
Just right click on the link and press “save as.”
|Glucose mmol/l (mg/dl)||Value|
|less than 6.1 (110) on an empty stomach||normal value|
|between 6.1 (110) and 6.9 (125) on an empty stomach||limit value|
|more than 7.0 (125) on an empty stomach||possible diabetes|
|more than 11.0 (198) anytime||possible diabetes|
The next chart displays all possible blood sugar (glucose) levels along with a short explanation what the indicators are.
|Blood Sugar Levels||Indication|
|Less than 70 mg/dl (3.9 mmol/l)||Low fasting blood sugar|
|70 to 99 mg/dl (3.9 to 5.5 mmol/l)||Normal fasting blood sugar for adults|
|100 to 125 mg/dl (5.6 to 6.9 mmol/l)||Impaired fasting glucose (pre-diabetes)|
|126 mg/dl (7.0 mmol/l) and above in more than one test result||Diabetes|
|about 70-125 mg/dl (3.9-6.9 mmol/l)||Normal random blood sugar|
|about 70-145 mg/dl (3.9-8 mmol/l)||Normal postprandial blood sugar|
|about 146-199 mg/dl (8.1-10.9 mmol/l)||Borderline postprandial blood sugar. May indicate pre-diabetes.|
|Less than 70 mg/dl (3.9 mmol/l)||Hypoglycemia (Initial Stage)|
|50 mg/dl (2.8 mmol/l)||Hypoglycemia (Fasting)|
|less than 50 mg/dl (2.8 mmol/l)||Insulin Shock|
|145-200 mg/dl (8-11 mmol/l) Post meal||Value suggesting early diabetes|
|More than 200 mg/dl (11 mmol/l) Post meal||Value suggesting established diabetes|
Normal values for blood sugar are (values are in mmol/l, mg/dl and HbA1c) in the table below.
|Blood sugar levels||HbA1c||mg/dl||mmol/l|
|low||less than 4||less than 65||less than 3,6|
Low blood sugar levels, normal blood sugar levels and high blood sugar levels chart.
When your blood sugar level drops below 63 mg/dl (3,5 mmol/l), it means you have a low level of blood sugar. The usual symptoms of low blood sugar levels are hunger, sweating, restlessness, faltering speech, confusion, tremor, difficulty in concentration, drowsiness, headache, visual disturbances…
Symptoms can vary between different people (organisms), and in some cases, the symptoms can even remain unrecognized (unconscious hypoglycemia).
High blood sugar and diabetes is caused by a number of abnormalities in the body, one of them being the affected vascular walls of small and large arteries (diabetic micro-and macro-angiopathy) in a process called atherosclerosis.
We can say that a blood sugar level is high if we measure glucose level and get the following values – more than 110 mg/dl (6.1 mmol/l) on an empty stomach or at any time more than 200mg/dl (11.1 mmol/l).
High blood sugar levels affect the arteries throughout the body, especially the organs which have the richest blood circulation: heart, brain, kidney, senses, nerves and other organs.
If the high blood sugar is associated with disturbances in lipid metabolism (blood fat), the abnormalities are more intense. Diabetes are among the risk factors for major non-communicable diseases: cardiovascular (coronary) disease, cerebral vascular disease and peripheral vascular diseases.
Blood sugar level is determined when the person has an empty stomach. In a healthy person, a normal blood glucose level is about 6.1 mmol/l. Read on how to check blood sugar values. You can also buy test strips here and here.
For checking your blood sugar level, you will need:
Medical alcohol to clean the skin where you will prick your finger, a sterile tool to prick your finger, some test strips and a glucose meter to read the test strip.
|Blood Sugar Level||Children mg/dl (mmol/l)||Adults mg/dl (mmol/l)|
|Normal||70 – 100 mg/dL (3.9 – 5.5 mmol/l)||70 – 140 mg/dL (3.9 – 7.7 mmol/l)|
|Low||lower than 70 mg/dL (lower than 3.9 mmol/l)||lower than 70 mg/dL (lower than 3.9 mmol/l)|
|High||Over 140 mg/dL (over 7.7 mmol/l)||Over 180 mg/dL (over 10 mmol/l)|
Blood sugar level values are a bit different because of unit conversions – from mg/dl to mmol/l.
At this time there is no known case of cured diabetes. The fact is that with Diabetes type 1, body’s cells that produce insulin are destroyed. These cells cannot be regrown or replaced. You need to use insulin injections to control blood sugar levels.
With type 2 diabetes your body does not use insulin properly (also known as insulin resistance). Over time your condition worsen as your body cannot make enough insulin to keep your blood glucose at normal levels.
With exercise and proper diet you can control your diabetes and live a normal life. Read more about diabetic diet.
A patient with diabetes is at a 5 times greater risk of developing cardiovascular disease than patients without diabetes. One third of all cardiovascular diseases also affect people with diabetes. Three quarters of diabetics die from cardiovascular disease. Women with diabetes have a 4 times greater risk of death from cardiovascular disease. People suffering from diabetes usually have high cholesterol levels as well.
Disturbances in the metabolism of blood sugar levels are mainly the consequences of heredity (diabetes in the family), age (over 40), poor diet, excessive body weight (obesity) and physical inactivity. Disturbances in the metabolism of blood sugar were present in 20% of adult Europeans during 2002-2005 a study showed.
RECOMMENDATIONS to decrease elevated blood sugar:
Blood sugar level is determined in the fasting state. In a healthy person, a normal blood glucose level is 110 mg/dl (6.1 mmol/l). By measuring values of blood sugar, we can say that there are 3 options:
People with high blood sugar levels can lower their blood sugar levels by maintaining normal body weight, eating healthy and by physical activity. This way you might prevent or delay disease and enhance your health and physical performance.
What can you do to lower the chance of developing diabetes:
Reviewed: 4th of June, 2014