Blood Sugar Levels Chart by Age: What’s Normal and What’s Not

23 Aug 2025

Blood Sugar Levels Chart by Age: What’s Normal and What’s Not Understanding your blood sugar levels is crucial for maintaining overall health and prev...

Blood Sugar Levels Chart by Age: What’s Normal and What’s Not

Understanding your blood sugar levels is crucial for maintaining overall health and preventing serious conditions like diabetes. Blood sugar, or glucose, is the primary source of energy for our bodies, and keeping it within a healthy range is vital. However, normal blood sugar levels can vary based on factors such as age, time of day, and when you last ate. This article provides a detailed blood sugar levels chart by age, explaining what’s considered normal and what might indicate a potential health issue.

Why Blood Sugar Monitoring Matters

Blood sugar monitoring is particularly important for individuals with diabetes, prediabetes, or those at risk of developing these conditions. Regularly checking blood sugar levels helps:

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  • Manage diabetes effectively.
  • Prevent long-term complications associated with high or low blood sugar.
  • Adjust medication, diet, and exercise as needed.
  • Provide early detection of any abnormalities.

For individuals without diabetes, understanding normal blood sugar ranges can still be beneficial for general health awareness.

Blood Sugar Levels Chart by Age

It's important to note that these ranges are general guidelines and might vary slightly depending on individual health conditions and the specific lab used. Always consult with a healthcare professional for personalized advice.

Age Group Fasting Blood Sugar (mg/dL) 2 Hours After Eating (mg/dL) A1C (%)
Children (Under 6) 80-200 Up to 200 N/A (Individualized target)
Children (6-12) 80-180 Up to 180 N/A (Individualized target)
Teenagers (13-19) 70-150 Up to 140 N/A (Individualized target)
Adults (20+) without Diabetes 70-99 Less than 140 Less than 5.7%
Adults (20+) with Diabetes 80-130 Less than 180 Less than 7% (as recommended by ADA)
Elderly (65+) with Diabetes 90-150 Less than 180 Less than 7.5% (Individualized target)
  • Fasting Blood Sugar: Measured after at least 8 hours of fasting.
  • 2 Hours After Eating: Measured 2 hours after the start of a meal.
  • A1C: Reflects average blood sugar levels over the past 2-3 months.

Important Note: For children and teenagers with diabetes, the target blood sugar ranges and A1C goals are often individualized based on age, overall health, and specific treatment plans. Therefore, strict adherence to healthcare provider recommendations is essential. For older adults, especially those with other health issues, goals may be more relaxed to avoid hypoglycemia (low blood sugar).

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Understanding the Numbers: What’s Normal and What’s Not

  • Normal Blood Sugar: Generally falls within the ranges specified in the chart above for each age group and condition (with or without diabetes).

  • High Blood Sugar (Hyperglycemia):

    • Fasting blood sugar above 130 mg/dL.
    • 2 hours after eating blood sugar above 180 mg/dL (generally).
    • Symptoms can include increased thirst, frequent urination, blurred vision, and fatigue. Untreated hyperglycemia can lead to serious complications.
    • Low Blood Sugar (Hypoglycemia):

    • Blood sugar below 70 mg/dL.

    • Symptoms can include shakiness, sweating, dizziness, confusion, and rapid heartbeat. Hypoglycemia requires immediate treatment, typically with a fast-acting source of glucose.

Factors Affecting Blood Sugar Levels

Many factors can influence your blood sugar levels, including:

  • Diet: The type and amount of food you eat, especially carbohydrates.
  • Physical Activity: Exercise can lower blood sugar levels.
  • Medications: Certain medications, including insulin and oral diabetes drugs, affect blood sugar.
  • Stress: Stress hormones can raise blood sugar.
  • Illness: Infections can lead to higher blood sugar levels.
  • Age: As we age, our bodies may become less efficient at regulating blood sugar.
  • Hydration: Dehydration can impact blood sugar levels.

How to Maintain Healthy Blood Sugar Levels

Whether you have diabetes or are simply aiming for better health, these tips can help:

  • Eat a Balanced Diet: Focus on whole grains, lean proteins, healthy fats, and plenty of fruits and vegetables. Limit processed foods, sugary drinks, and excessive carbohydrate intake.
  • Regular Exercise: Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
  • Stay Hydrated: Drink plenty of water throughout the day.
  • Monitor Blood Sugar Regularly: If you have diabetes, follow your doctor's recommendations for blood sugar monitoring.
  • Manage Stress: Practice stress-reducing techniques like yoga, meditation, or deep breathing.
  • Get Enough Sleep: Poor sleep can affect blood sugar control.
  • Work with Your Healthcare Provider: Regular check-ups and discussions with your doctor are essential for managing your blood sugar and overall health.

When to See a Doctor

Consult a healthcare professional if you experience:

  • Frequent or persistent symptoms of high or low blood sugar.
  • Significant fluctuations in blood sugar levels.
  • Unexplained changes in weight or appetite.
  • Any concerns about your diabetes management plan (if applicable).

The Importance of A1C Testing

The A1C test is a vital tool in assessing long-term blood sugar control. Unlike a daily blood sugar reading, the A1C test provides an average of your blood sugar levels over the past 2-3 months. This helps healthcare providers understand how well your diabetes management plan is working and make necessary adjustments.

  • Frequency of A1C Testing: The American Diabetes Association recommends that individuals with diabetes have their A1C tested at least twice a year, or more frequently if their blood sugar is not well-controlled or if there are changes in their treatment plan.
  • A1C Goals: The general goal for most adults with diabetes is an A1C of less than 7%. However, individual goals may vary based on age, overall health, and other factors. Your healthcare provider will determine the most appropriate A1C target for you.

Blood Sugar and Pregnancy (Gestational Diabetes)

Gestational diabetes is a type of diabetes that develops during pregnancy in women who did not have diabetes before. It can lead to complications for both the mother and the baby if not properly managed.

  • Screening: Pregnant women are typically screened for gestational diabetes between 24 and 28 weeks of pregnancy.
  • Blood Sugar Targets: Blood sugar targets for pregnant women with gestational diabetes are generally stricter than those for non-pregnant adults with diabetes:
    • Fasting: Less than 95 mg/dL
    • 1 Hour After Meal: Less than 140 mg/dL
    • 2 Hours After Meal: Less than 120 mg/dL
  • Management: Management of gestational diabetes typically involves a combination of diet modifications, regular exercise, and, in some cases, medication (insulin).

Continuous Glucose Monitoring (CGM)

Continuous glucose monitoring (CGM) systems are devices that track blood glucose levels in real-time throughout the day and night. They consist of a small sensor inserted under the skin that measures glucose levels in interstitial fluid.

  • Benefits: CGMs offer several benefits, including:
    • Providing a comprehensive picture of glucose trends.
    • Alerting users to high or low glucose levels.
    • Reducing the need for frequent fingersticks.
    • Improving overall glucose control.
  • Who Can Benefit: CGMs are commonly used by individuals with type 1 diabetes and some individuals with type 2 diabetes, particularly those on insulin.

Conclusion

Keeping track of your blood sugar levels is essential for maintaining overall well-being and averting health problems. Utilizing a blood sugar levels chart by age as a guideline helps you understand whether your levels are within a healthy range. Remember, individual needs may vary, so it’s crucial to consult with a healthcare provider for personalized advice. By adopting healthy lifestyle habits and monitoring your blood sugar regularly, you can proactively manage your health and reduce the risk of diabetes-related complications. Understanding normal blood sugar ranges and promptly addressing any deviations is vital for a healthier life.