What Is a Normal Blood Sugar Level? Charts by Age Included

23 Aug 2025

What Is a Normal Blood Sugar Level? Charts by Age Included Understanding what constitutes a normal blood sugar level is crucial for maintaining good h...

What Is a Normal Blood Sugar Level? Charts by Age Included

Understanding what constitutes a normal blood sugar level is crucial for maintaining good health. Blood sugar levels, also known as blood glucose levels, indicate the amount of glucose present in your blood. Glucose is your body's primary source of energy, derived from the food you eat. Maintaining these levels within a target range is especially vital for individuals with diabetes but is also important for overall well-being for everyone.

Related reading: What Is Prediabetes A Guide To A1C Levels Ranges And Reversal

Why Blood Sugar Levels Matter

Monitoring and maintaining healthy blood sugar levels helps prevent a variety of health complications. Chronically high blood sugar (hyperglycemia) can lead to serious issues like nerve damage, kidney problems, heart disease, and vision loss. Conversely, consistently low blood sugar (hypoglycemia) can cause dizziness, confusion, and in severe cases, seizures or loss of consciousness.

Understanding the different types of blood sugar tests and their corresponding normal ranges will empower you to manage your health proactively.

Understanding Blood Sugar Tests

Several types of blood sugar tests are commonly used to assess blood glucose levels. Each test provides different insights into your blood sugar control. Here are the key tests:

  • Fasting Blood Sugar (FBS): This test measures your blood sugar after an overnight fast (typically 8 hours). It's a common screening tool for diabetes.
  • Postprandial Blood Sugar (PPBS): This test measures your blood sugar two hours after you start eating a meal. It helps assess how your body handles glucose after food intake.
  • Random Blood Sugar (RBS): This test can be taken at any time of day, regardless of when you last ate. It's often used when diabetes symptoms are present.
  • A1C Test (Glycated Hemoglobin): This blood test provides an average of your blood sugar control over the past 2-3 months. It reflects the percentage of your hemoglobin that's coated with glucose.

Normal Blood Sugar Levels: Charts by Age

The following charts outline general target ranges for blood sugar levels based on age. These ranges are general guidelines, and individual targets may vary based on personal health conditions, medications, and specific recommendations from your healthcare provider. Always consult your doctor for personalized advice.

Related reading: Control Blood Sugar With This Simple A1C To Eag Conversion Guide

Blood Sugar Level Chart for Adults (Non-Diabetic)

Test Normal Range (mg/dL)
Fasting Blood Sugar (FBS) 70-99
Postprandial Blood Sugar (PPBS) (2 hours after eating) Less than 140
A1C Below 5.7%

Blood Sugar Level Chart for Adults with Diabetes

Test Target Range (mg/dL)
Fasting Blood Sugar (FBS) 80-130
Postprandial Blood Sugar (PPBS) (2 hours after eating) Less than 180
A1C Below 7.0% (or as recommended by your doctor)

Blood Sugar Level Chart for Children (Non-Diabetic)

Test Normal Range (mg/dL)
Fasting Blood Sugar (FBS) 70-100
Postprandial Blood Sugar (PPBS) (2 hours after eating) Less than 140
A1C Below 5.7%

Blood Sugar Level Chart for Children with Type 1 Diabetes

Test Target Range (mg/dL)
Before Meals 70-130
1-2 Hours After Meals Less than 180
A1C Below 7.5% (May vary; consult doctor)

Important Considerations:

  • These ranges can vary based on individual factors like age, overall health, and any existing medical conditions.
  • Targets for children with diabetes may differ based on age, activity level, and other factors.

Factors That Can Affect Blood Sugar Levels

Several factors can influence your blood sugar levels, including:

  • Diet: The type and amount of food you eat significantly impacts your blood sugar. High-carbohydrate foods can cause a more rapid increase in blood sugar compared to foods with lower carbohydrate content.
  • Physical Activity: Exercise helps lower blood sugar as your muscles use glucose for energy. Regular physical activity improves insulin sensitivity.
  • Stress: Stress hormones like cortisol can raise blood sugar levels.
  • Illness: When you're sick, your body releases hormones that can elevate blood sugar.
  • Medications: Certain medications, such as steroids, can impact blood sugar levels. Diabetes medications of course are designed to directly impact and control blood sugar.
  • Dehydration: Dehydration can lead to more concentrated blood sugar levels, giving a potentially artificially high reading.

How to Maintain Healthy Blood Sugar Levels

Related reading: Low Blood Sugar Hypoglycemia Symptoms You Should Never Ignore

Maintaining healthy blood sugar levels involves a combination of lifestyle modifications and, in some cases, medication. Here are some practical tips:

  • Eat a Balanced Diet: Focus on whole foods, including fruits, vegetables, lean proteins, and whole grains. Limit processed foods, sugary drinks, and excessive carbohydrates.
  • Engage in Regular Physical Activity: Aim for at least 150 minutes of moderate-intensity aerobic exercise per week.
  • Monitor Your Blood Sugar Regularly: If you have diabetes, follow your doctor's recommendations for blood sugar monitoring. Keeping a log of your results can help you identify patterns and make informed decisions about your diet and medication.
  • Manage Stress: Practice relaxation techniques such as meditation, yoga, or deep breathing exercises to reduce stress levels.
  • Stay Hydrated: Drink plenty of water throughout the day to help maintain optimal blood sugar levels.
  • Get Enough Sleep: Aim for 7-8 hours of quality sleep each night. Sleep deprivation can affect hormone levels and contribute to insulin resistance.
  • Work with your healthcare provider: Regular checkups and honest conversation are crucial for proactive health management.

When to See a Doctor

If you consistently experience blood sugar levels outside the target ranges, it's essential to consult your healthcare provider. Signs that warrant medical attention include:

  • Frequent urination, especially at night
  • Excessive thirst
  • Unexplained weight loss
  • Increased hunger
  • Blurred vision
  • Slow-healing sores
  • Frequent infections
  • Numbness or tingling in your hands or feet

Your doctor can help determine the underlying cause of your blood sugar imbalances and recommend appropriate treatment options, which may include lifestyle changes, medication, or further testing.

The Role of Continuous Glucose Monitoring (CGM)

For some individuals, especially those with Type 1 diabetes, a continuous glucose monitor (CGM) can be beneficial. A CGM is a small device inserted under the skin that continuously tracks blood glucose levels throughout the day and night. CGMs provide real-time data and alerts, allowing individuals to make informed decisions about their insulin doses, diet, and exercise. They can also help detect patterns and trends in blood sugar levels that might not be apparent with traditional fingerstick testing.

In Summary

Understanding and maintaining normal blood sugar levels is vital for your overall health. By being proactive and staying informed, you can effectively manage your blood sugar and prevent complications. Remember that consulting with your healthcare provider for personalized advice is crucial for your specific health needs. Using the charts included here and incorporating healthy lifestyle habits can assist in controlling blood glucose, and improving overall health.