You are here: 

What is Normal Blood Sugar Level

The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or an animal.

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.

Keywords: blood sugar levels, blood sugar levels chart, diabetes type 1 and 2, high and low blood sugar levels, normal blood sugar level, ideal blood sugar level

See Article References

What is blood sugar?
What is diabetes?
Diabetes symptoms
Levels and indication
Normal blood sugar levels
Low blood sugar levels
High blood sugar levels
How to lower blood sugar level?
Children blood sugar levels
Blood sugar levels chart
Checking for BS:
How to check blood sugar?
How to lower blood sugar level?
Can diabetes be cured?

What is blood sugar?

What does it mean when someone refers to blood sugar level in your body? Blood sugar level (or blood sugar concentration) is the amount of glucose (a source of energy) present in your blood at any given time.
A normal blood glucose level for a healthy person is somewhere between 72 mg/dL (3.8 to 4 mmol/L) and 108 mg/dL (5.8 to 6 mmol/L). It, of course, depends on every individual alone.

Typically blood sugar level in humans is around 72 mg/dL (or 4 mmol/L). After a meal the blood sugar level may increase temporarily up to 140 mg/dL (7.8 mmol/L). This is normal.

Note: mg/dL and mmol/L are units of measure. mg/dL is mostly used in USA whereas mmol/L is mostly used in EU and other parts of the world. For easier conversion try our mg/dL mmol/L conversion tool.

checking blood sugar level A blood sugar level between 72 mg/dL (4 mmol/L) and 108 mg/dL (6 mmol/L) is considered normal for a healthy adult.

What is normal blood sugar level?

A normal blood sugar level is between 72 mg/dL and 108 mg/dL (4 to 6 mmol/L) for a healthy person.

The concentration of glucose in the blood of a healthy person in the morning on an empty stomach is between 68 mg/dL and 108 mg/dL (3.8 and 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 and 7.8 mmol/L).

For children up to 6 years of age desired blood sugar level before eating is between 100 mg/dL (5.5 mmol/L) and 180 mg/dL (10 mmol/L). Before sleep values should be between 110 mg/dL (6.1 mmol/L) and 200 mg/dL (11.1 mmol/L).

For children between the age of 6 and 12, before eating, blood sugar levels should be between 90 mg/dL (5 mmol/L) and 180 mg/dL (10 mmol/L). Before sleep values should be between 100 mg/dL (5.5 mmol/L) and 180 mg/dL (10 mmol/L).

Children aged 13 to 19 should expect similar readings than those of adults.

Blood sugar levels chart

Blood sugar levels rise and drop during the day. This is normal. However, dramatic fluctuations in your blood glucose levels may indicate problems.

Dramatic changes of blood sugar levels have significant physical symptoms and will increase your risk of diabetes-related complications.

Click on the image below to get a larger chart.

blood sugar levels chart

Blood sugar levels chart displays possible levels of blood glucose. Values are expressed in mmol/L and mg/dL. This blood sugar levels chart is not 100% accurate due to different thresholds set in different countries around the world. Consult your personal doctor for more information. Source:

Download your blood sugar levels log and keep track of your own blood sugar levels – write down all of your measured values.
Blood sugar levels chart for non-diabetics (goal blood sugar levels)
Glucose mg/dL or mmol/L Value
less than 110 mg/dL or 6 mmol/L on an empty stomach normal value
between 110 mg/dL or 6.1 mmol/L and 125 mg/dL or 6.9 mmol/L on an empty stomach limit value
more than 125 mg/dL or 7.0 mmol/L on an empty stomach possible diabetes
more than 198 mg/dL or 11.0 mmol/L anytime possible diabetes
Blood sugar levels chart for diabetics (goal blood sugar levels)
Glucose mg/dL or mmol/L Value
Before breakfast (fasting) 70 – 130 mg/dL or 3.9 – 7.2 mmol/L
Before lunch, supper and snack 70 – 130 mg/dL or 3.9 – 7.2 mmol/L
Two hours after meals less than 180 mg/dL or less than 10mmol/L
Bedtime 90 – 150 mg/dL or 5 – 8.3 mmol/L
A1C (also called glycosylated hemoglobin A1c, HbA1c or glycohemoglobin A1c) less than 7%

Please note that you should perform several consecutive blood glucose tests and not rely on one single measurement.

The next chart displays all possible blood sugar (glucose) levels along with a short explanation of what the indicators are.

Blood sugar chart and indicators
Blood Sugar Levels Indication
Less than 70 mg/dL (3.9 mmol/L) Low fasting blood sugar
70 to 108 mg/dL (3.9 to 6 mmol/L) Normal fasting blood sugar for adults
110 to 125 mg/dL (6.1 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 to 140 mg/dL (3.9 to 7.8 mmol/L) Normal postprandial blood sugar
about 142 to 199 mg/dL (7.9 to 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 / non-fasting
Blood sugar levels HbA1c mg/dL mmol/L
low less than 4 less than 65 less than 3.6
normal optimal 4 65 3.6
normal optimal 4.1 69 3.8
normal optimal 4.2 72 4
normal optimal 4.3 76 4.2
normal optimal 4.4 80 4.4
normal optimal 4.5 83 4.6
normal optimal 4.6 87 4.8
normal optimal 4.7 90 5
normal optimal 4.8 94 5.2
normal optimal 4.9 97 5.4
good marginal 5 101 5.6
good marginal 5.1 105 5.8
good marginal 5.2 108 6
good marginal 5.3 112 6.2
good marginal 5.4 115 6.4
good marginal 5.5 119 6.6
good marginal 5.6 122 6.8
good marginal 5.7 126 7
good marginal 5.8 130 7.2
good marginal 5.9 133 7.4
at risk 6 137 7.6
at risk 6.1 140 7.8
at risk 6.2 144 8
at risk 6.3 147 8.2
at risk 6.4 151 8.4
at risk 6.5 155 8.6
at risk 6.6 158 8.8
at risk 6.7 162 9
at risk 6.8 165 9.2
at risk 6.9 169 9.4
dangerously high 7 172 9.6
dangerously high 7.1 176 9.8
dangerously high 7.2 180 10
dangerously high 7.3 183 10.2
dangerously high 7.4 187 10.4
dangerously high 7.5 190 10.6
dangerously high 7.6 194 10.8
dangerously high 7.7 198 11
dangerously high 7.8 201 11.2
dangerously high 7.9 205 11.4
possible complications 8 208 11.6
possible complications 8.1 212 11.8
possible complications 8.2 215 12
possible complications 8.3 219 12.2
possible complications 8.4 223 12.4
possible complications 8.5 226 12.6
possible complications 8.6 230 12.8
possible complications 8.7 233 13
possible complications 8.8 237 13.2
possible complications 8.9 240 13.4
mortal danger 9 244 13.6
mortal danger 9+ 261+ 13.6+

Low blood sugar levels, normal blood sugar levels and high blood sugar levels chart.

What is considered low blood sugar level?

When your blood sugar level drops below 70 mg/dL (3,9 mmol/L) this 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 may vary – different people might experience different symptoms. In some cases symptoms can even remain unrecognized (unconscious hypoglycemia).

    What is considered high blood sugar level?

    Chronically high blood sugar (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 200 mg/dL (11.1 mmol/L).

    measuring blood sugar level Source:
    If measured blood sugar level is high you should consult your personal doctor! High values of blood sugar may indicate diabetes.

    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 is among the risk factors for major non-communicable diseases: cardiovascular (coronary) disease, cerebral vascular disease and peripheral vascular diseases.

    Diabetes symptoms

    Typical symptoms of high blood sugar levels (diabetes) are thirst, frequent urination and unexpected weight loss. Sometimes a patient may also experience the following:

  • impaired vision,
  • itching skin,
  • fatigue,
  • increased appetite,
  • skin infections,
  • feeling of dizziness,
  • heavy dehydration.
  • 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 nearly absent.

    Use this tool to see if you are in danger of or are developing diabetes: LINK
    Click here for possible diabetes cure.
    Use this tool to convert blood sugar values.

    How to check blood sugar

    There are basically two main tests which are conducted to determine whether someone has diabetes.

    Impaired fasting glycemia test
    When being tested for diabetes by a impaired fasting glycemia test, blood sugar levels will normally be taken after around eight hours of fasting.

    Impaired glucose tolerance test
    An impaired glucose tolerance test involves taking a concentrated amount of glucose and then measuring blood sugar levels after two hours.

    In a healthy person, a normal blood glucose level is between 72 mg/dL (4 mmol/L) and 108 mg/dL (6 mmol/L). Read on how to check blood sugar values.

    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.

    You can easily buy blood glucose tester on this link.

    Expected blood sugar level values:
    Glucose mg/dL or mmol/L level Value
    less than 110 mg/dL or 6 mmol/L on an empty stomach normal value
    between 110 mg/dL or 6.1 mmol/L and 125 mg/dL or 6.9 mmol/L on an empty stomach limit value
    more than 125 mg/dL or 7.0 mmol/L on an empty stomach possible diabetes
    more than 198 mg/dL or 11.0 mmol/L anytime possible diabetes

    Can diabetes be cured?

    At this time there is no known official 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 your blood sugar levels.

    With type 2 diabetes your body does not use insulin properly (also known as insulin resistance). Over the time a patient’s condition worsens as body cannot make enough insulin to keep blood glucose at normal levels.

    With exercise and proper diet you can control your diabetes and live a normal life. Read more about diet for people with diabetes and blood type diet.

    Refer to this article for more information on how brown fat tissue may help control your disease or even revert it! No hoax – scientifically proven!
    Brown fat protects against diabetes and obesity in humans

    How to lower blood sugar level?

    A patient with diabetes is at a 5 times greater risk of developing cardiovascular disease than patient 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 consequence 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 less than 108 mg/dL or 6 mmol/L on an empty stomach. By measuring values of blood sugar, we can say that there are 3 options:

    • normal blood sugar level (the blood glucose level is normal on an empty stomach),
    • disruption of glycemia (blood glucose in the blood on an empty stomach is increased to a maximum value between 110 and 124 mg/dL (6.1 and 6.9 mmol/L),
    • diabetes (elevated blood sugar levels to 126 mg/dL / 7.0 mmol/L or more).
    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:

    • lose weight – be fit,
    • sleep more, be rested. Read this article on what to do if you cannot sleep.
    • have a healthy diet (read how should a diabetic diet look like) with as many vegetables and fruits, a lot of fiber, consume less calories, less fat, less alcoholic beverages and no simple sugars,
    • workout at least 30 minutes per day.
    American Diabetes Association (ADA) –
    Academy of Nutrition and Dietetics –
    National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) –
    Children with Diabetes –
    Canadian Diabetes Association (CDA) –
    National Diabetes Education Program –
    National Heart, Lung, and Blood Institute –
    International Diabetes Federation –
    CDC on Diabetes –
    Diabetes Care –
    American Association of Diabetes Educators –

    Related posts:

    End of the article.

    About author:
    Matej Gololicic >> @Healthiack >> Facebook page
    I am trying to provide useful information on several topics regarding health, food, diet, weight loss and sport!
    If you like my articles, please do subscribe and share the content! Check out my other posts too!

    95 Comments on this article. Feel free to join this conversation.

    1. nasee May 13, 2015 at 10:43 am - Reply

      sir my blood sugar is 136mgl/dl at fasting time .

    2. stuccer March 30, 2015 at 10:09 pm - Reply

      if your blood sugar is 180 or more, uh, I would go see a doctor. Definitely cut out the sweets, and especially the sodas but really you need to be controlling carb intake because carbs are sugar.

      Chromium will lower blood sugar. It is the only thing I have found that will. Do not use it though, unless you are monitoring your blood sugar levels and are already familiar with what those levels are.

    3. rita barrett March 19, 2015 at 11:24 am - Reply

      please can you tell me why my blood sugar goes between 3and 12

    4. Justine Munenguni March 13, 2015 at 4:20 am - Reply

      I almost put myself at risk, luckily I went for check up early and my blood sugar levels was 12.9 and when go back after one week it was 8.2. I thank my Dr. because he advised me well to stop drinking fizz drinks, do regular exercise, eat more fruits and vegetables and have a balance diet and I followed the instructions. Now it’s at normal

    5. Karen hunston February 24, 2015 at 2:35 pm - Reply

      Hi was wondering could you tell me what the normal blood test should read it’s just my 4 yr old son has autism and recently he had to have a lot of blood tests done for medical and metabolic testing the result is as follows ph 7.378 pco2 5.09kpa po2 11.24kpa hit 38.3 percent na’137.6mmol/l k’3.97mmol/ l ca2+1.187mmol/l glu 5.9mmol/l lac1.8mmol/l uhb12.5g/dl be _277 mmol/l chco2 22.0 mmo/l so2 97.0percent O2 he 95.5 percent Cohb0.9 percent methb0.6 percent hub 3.0 percent and Bill value below 3.0 mg /dl are these ok or should I be worried haven’t to go back to drs fir 2 months

    6. w9nroses February 5, 2015 at 4:59 pm - Reply

      I was hospitalized for 6 days, brought in with blood sugar of 14 and body temp 91. I have been taking my readings every morning since I have been released (about 2 weeks) my Blood has been back in forth from 60 to 89 but this morning I didn’t wake up til 11:30 am and it was 138! This is on an empty stomach. Is this just as bad as being dreadfully low? We still have no answers as of why it was at 14.

    7. B.Patel January 25, 2015 at 1:07 am - Reply

      My wife 69 years old diabetic for 27 years.from 9 a.m. To midnight her Blood sugar is in Hyperglycemia range, mostly in the range 250/350 mg/DL.After midnight her Blood Sugar level drops at a very high rate and by 3/4 a.m. It drops to Hypoglycemia range,mostly in the range 40/80 mg/DL. After 5 a.m. It starts reversing and by 7 a.m. It shows her Blood Sugar level in normal range say 100/110 mg/DL.
      This is inspite of the fact that she is not given any medicine after lunch and no food after 10p.m.
      Can anybody tell from where insulin comes after midnight and from where sugar comes after 5 a.m.?

      • Stacy June 22, 2015 at 2:51 am - Reply

        blood sugars rise at night because of cortisol levels. The high sugars at night are common. The numbers you mentioned during the day are very high. Speak with your doctor. You might need to check your blood glucose before meals and get insulin coverage for meals. She needs a doctor.

    8. Abhi Das December 25, 2014 at 4:14 pm - Reply

      My uncle who is 65 yes old having diabetes. His sugar level during fasting is 148 mg/dl and after 2 hours from mealbit is 258 mg/DL. Please suggest what to do?

    9. carolina December 4, 2014 at 4:50 am - Reply

      I recently checked my blood sugar out of curiosity and it was 49 mg/dL. I felt completely normal though. I’m 17 years old, 4’11 and 105 lbs. I have had symptoms of hypoglycemia in the past (dizziness, increased heart rate, fatigue), but overall, I’m a very healthy individual. My mother has low blood sugar levels, as well, but she’s never experienced this. I must also add that my father is a diabetic (which explains why i have a blood glucose tester) and diabetes runs in my family. I don’t have diabetes, however. So… can anyone explain what’s going on with my blood sugar?!

    10. Autumn November 28, 2014 at 12:13 pm - Reply

      A fasting reading this morning I did was 83 then I ate and checked again after and hour or so it was 110. Then checked again at random it was 96. My doc suggested I might be hypoglycemic because of some of the particular symptoms I’ve had. I’m not sure if my sugar just runs low because most of the time I don’t feel the symptoms. But when I do I get scared out of my wits. I don’t scare easily so I know this is nothing to be messed with. Idk know what my normal sugar level is being that I’m 6’6 148lbs

    11. geraldine November 17, 2014 at 3:29 pm - Reply

      My normal blood sugar reading is between 102 to 110 before breakfast my goal is to keep it from going any higher 126 in the morning before breakfast is high to me .I am type 2 diabetic. I watches what I eat and exercise when I can walking is good

    12. Anushree Pathak November 10, 2014 at 6:16 pm - Reply

      My random blood sugar was 103 is that normal?? Plz reply

    13. gokul bhatt October 16, 2014 at 6:23 am - Reply

      sir i check my blood sugar level in the morning after 2hr of taking meal. it showing 103 mg/dl. what it show. i am 23yr old. & my father has diabetes problem. he give me blood in my child hood when i admitted in hospital that time i was 2 yrs old. is their possibility that i also have diabetes problem.
      please help me, guided me.

      in the hope of favorable response

      thank you.

    14. Zakaria Umar Sumaila October 12, 2014 at 9:23 pm - Reply

      Just around the borderline on both BP and Blood Sugar. Learning how to use natural means (diet and exercise) to keep both within normal ranges.

    15. pinky September 17, 2014 at 5:11 am - Reply

      sir now a days my blood suger level is high after meal my suger in night 183 and after drink tea is 153 and i do not eat sweet and drink then my suger level is high my age is just 24 my 6 month beby and my family heredity blood suger

    Leave A Response