Blood Sugar Chart You’ll Need All the Time in Diabetes

Tatheer Zehra Zaidi   by Tatheer Zehra Zaidi, M. Pharma    Last updated on April 22, 2021,

blood sugar level

What is a blood sugar chart?

A blood sugar chart or blood glucose chart or blood sugar level chart identifies ideal blood sugar levels in your body throughout the day, including before meals and after meals. If you need to keep track of your blood sugar levels, particularly when you are diabetic, during the day or over a period of weeks or months, you can use a blood sugar chart as a reference.

The blood glucose chart is also known by many other names such as diabetes chart, low blood sugar levels chart, high blood sugar level chart, blood sugar levels chart by age, diabetic blood sugar chart, normal blood sugar levels chart, etc.

Why is it important to monitor my blood sugar levels (blood glucose levels)?

Tracking blood sugar is important for anyone who is suffering with diabetes or who is at risk of diabetes mellitus. Your blood sugar levels also called blood glucose levels change throughout the day. It is therefore important to monitor them and keep in mind exactly what your targets should be to make sure that you adhere to the guidelines and maintain ideal blood sugar levels.

You can use a blood sugar level chart as a healthy blood sugar level reference when you wake up, when you got o bed, when you are going to have a meal, and after you have taken a meal.

You or your doctor can use blood sugar level charts to specify target goals and monitor how well your diabetes treatment is going. Blood sugar charts also help those with diabetes review the blood sugar test results.

Other benefits of using blood sugar charts and blood sugar level charts are:

  • A diabetic chart helps keeping blood sugar levels as close to normal as possible to the set target goals
  • Comparing your at home test results of blood sugar with blood sugar chart as a reference for monitoring the levels
  • Understand normal, ideal, and abnormal blood sugar levels for those with and without diabetes
  • A1C blood sugar recommendations are also mostly included in blood sugar charts. An A1C test measures the average sugar levels over a 3-month period. This gives a better insight into overall health of a person with respect to the blood sugar levels.
  • Diabetic charts or blood sugar charts are important tools for your diabetes management

Blood sugar chart or Blood sugar level chart


When to check Blood sugar levels for people without diabetes Blood sugar levels for people with diabetes
Fasting (before breakfast) less than 100 mg/dL 80 - 130 mg/dL
Before meals less than 110 mg/dL 70-130 mg/dL
2 hrs after meal 
1-2 hrs after meal
less than 140 mg/dL less than 180 mg/dL
Bedtime less than 120 mg/dL 90 - 150 mg/dL
A1C levels less than 5.7 percent less than 7 percent


Interpreting your blood sugar test results

Ideals blood sugar levels may vary from person to person slightly. A good blood sugar level for one person may be too high or too low for someone else. For people with diabetes, though, some ranges of blood sugar levels are specified as are preferable over others.

Blood sugar levels 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

Blood sugar level recommendations for gestational diabetes

Certain temporary forms of diabetes such as gestational diabetes have different recommendation. The blood glucose chart for them is:

When to check Blood sugar levels in mg/dL
Fasting or before breakfast 60 - 90 mg/dL
Before meals 60 - 90 mg/dL
1-2 hours after meal 100 - 120 mg/dL


Dangerous levels of blood sugar (blood glucose)

There are certain ranges beyond which one should be concerned about, as these are considered as dangerous blood sugar levels or dangerous blood glucose levels. The risk level increases with these sugar levels in the blood. This blood glucose chart can be used as a reference for risk assessment.

Fasting blood sugar levels How dangerous it is (Risk) Risk level What to do?
50 mg/dL or less Dangerously low Seek medical attention
70 - 90 mg/dL Possibly too low Consume sugar if you are experiencing symptoms of low blood sugar or meet a doctor
90-120 mg/dL Normal range No action needed
120-160 mg/dL Medium Meet a doctor
160 - 240 mg/dL Too high Need to lower your blood sugar levels
240-300 mg/dL Too high It is a sign of uncontrolled diabetes. Meet a doctor at the earliest.
300 mg/dL or above Very high. Critically Dangerous. Emergency. Seek immediate medical attention.


AIC Numbers and blood glucose levels

Another way to understand your blood sugar is through the A1C test, An A1C lets you know where your glucose levels have been on average, over the last three months or other time frames.

A1C is a protein in red blood cells, and it binds with glucose. Since the red blood cells have a lifespan of about three to four months, the amount of blood sugar A1C collects can tell us about the average of your blood glucose levels.

The A1C percentage can be translated into other forms of readings based on the following blood sugar chart (diabetic chart).

How to translate A1C numbers into blood glucose levels


A1C (%) Blood Sugar Levels (mg/dl)
6 126
6.5 140
7 154
7.5 169
8 183
8.5 197
9 212
9.5 226
10 240


Testing your blood sugar and Monitoring blood sugar levels

Monitoring blood sugar levels is important for management of diabetes. It includes both self-monitoring at home and doctor-ordered tests, such as A1C tests.

You should track blood sugar level changes daily if you are diabetic and help your doctors understand what treatment plans are working or not working for you. This will help him or her adjust medications or set goals.

How frequent you should test the blood sugar varies according to your treatment plan and the type of diabetes you have. Here is how frequently you should test the blood sugar.

Type 1 diabetes in adults

At least twice daily and up to 10 times.

Tests should be done before breakfast, at fasting, before meals, 1-2 hours after meals, before and after physical activities or exercises, and when going to bed.

Type 1 diabetes in children

At least four times daily.

Tests should be done before having meals and when going to bed. Tests may also be required 1-2 hrs after meals, before and after exercise, and overnight.

Type 2 along with insulin or other medication going on

The frequency of tests varies depending on your insulin dosage and any other medicines you are taking.

If you are on intensive insulin medication, you should do tests at fasting, before meals, before bedtime, and sometimes in the night if needed. Those on usual insulin and additional medications dosage should at least perform the tests at fasting (before breakfast) and bedtime.

Those not on insulin but oral medications or diet control do not require frequent blood sugar testing at home.

Type 2 diabetes and low risk of low blood sugar

Daily tests are not usually required. If blood sugar goals or A1C levels are not met on a regular basis, the frequency of testing can be increased until the levels are back within normal ranges.

Gestational diabetes

If you are on insulin, tests should be done at fasting, before meals and 1 hour after meals. If you aren’t on insulin, you should perform tests at fasting and 1 hour after meals.

Tatheer Zehra Zaidi

Tatheer Zehra Zaidi is a clinical pharmacist and pharmacologist with a master’s degree in pharmacy practice. She aims to deliver a positive contribution in the field of healthcare and research. She received her bachelor’s and master’s degrees from Jamia Hamdard New Delhi and then joined Spirant Communication Private LTD as a Medical content writer.


Currently she is working at Maxinov Solutions Private LTD as a research associate and is associated with DiseaseFix as a medical content writer. Tatheer’s areas of interest include clinical research, clinical trial disclosure, and pharmacovigilance.

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