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Blood Sugar Levels Chart by Age: See What's Considered Normal for You

04 Sep 2025 by H. Keels S. Jorn, M.D.

Blood Sugar Levels Chart by Age: See What's Considered Normal for You

Maintaining healthy blood sugar levels is crucial for overall well-being, no matter your age. Understanding what constitutes "normal" can help you and your healthcare provider make informed decisions about your health. However, these levels can vary depending on age, time of day, and individual health conditions. This article provides a detailed blood sugar levels chart by age, explaining the ranges considered normal, and discussing factors that can influence these levels. Decoding The A1C Chart From Normal Levels To The Diabetes Range

Why Blood Sugar Levels Matter

Blood glucose, or blood sugar, is the primary source of energy for your body. It comes from the food you eat, and insulin, a hormone made by the pancreas, helps glucose from food get into your cells to be used for energy. Monitoring and managing your blood sugar is especially important for people with diabetes or those at risk of developing the condition. Uncontrolled high blood sugar can lead to serious health complications over time, including heart disease, kidney disease, vision problems, and nerve damage. Stabilize Your Blood Sugar To Avoid Energy Spikes And Crashes

Understanding Blood Sugar Readings

Before diving into the blood sugar levels chart by age, it's essential to understand what the readings mean. Blood sugar is typically measured in milligrams per deciliter (mg/dL). There are several different types of blood sugar tests:

  • Fasting Blood Sugar (FBS): This is measured after at least eight hours of fasting.
  • Postprandial Blood Sugar (PPBS): This is measured two hours after starting a meal.
  • A1C Test (HbA1c): This provides an average of your blood sugar levels over the past 2-3 months.
  • Random Blood Sugar (RBS): Measured at any time of day, regardless of when you last ate.

Blood Sugar Levels Chart by Age

The following table summarizes generally accepted blood sugar levels for different age groups. Note that these are general guidelines, and individual targets may vary based on your health status and your doctor’s recommendations.

Age Group Fasting Blood Sugar (mg/dL) 2-Hour Postprandial Blood Sugar (mg/dL) A1C (%)
Children (6-12 years) 80-120 Less than 140 Less than 7.5%
Teens (13-19 years) 70-150 Less than 140 Less than 7.5%
Adults (20-59 years) 70-99 Less than 140 Less than 5.7% (Non-Diabetic), Less than 7% (Diabetic)
Older Adults (60+ years) 80-100 Less than 160 Less than 7.5% (or higher, based on health)

Disclaimer: These values are general guidelines. Consult with your healthcare provider for personalized targets.

Detailed Explanation of Blood Sugar Ranges by Age

Children and Teens (6-19 years)

For children and teenagers, maintaining stable blood sugar levels is critical for growth and development. Blood sugar targets may be less stringent than for younger adults, particularly if they have type 1 diabetes. Generally, acceptable blood sugar levels are:

  • Fasting: 80-120 mg/dL
  • Postprandial: Less than 140 mg/dL
  • A1C: Less than 7.5%

Higher A1C goals are often permissible, recognizing that younger individuals might struggle with glycemic control and may be more susceptible to the effects of hypoglycemia (low blood sugar). Regular monitoring and communication with a pediatrician or endocrinologist are essential.

Adults (20-59 years)

In this age group, preventing the long-term complications of diabetes becomes a priority. The targets for blood sugar are:

  • Fasting: 70-99 mg/dL
  • Postprandial: Less than 140 mg/dL
  • A1C: Less than 5.7% (Non-Diabetic), Less than 7% (Diabetic)

Lifestyle modifications, such as diet and exercise, play a crucial role in maintaining these levels. Those with prediabetes (fasting blood sugar between 100-125 mg/dL or A1C between 5.7-6.4%) should focus on preventive measures to delay or prevent the onset of type 2 diabetes.

Older Adults (60+ years)

For older adults, blood sugar management needs to balance the risks of hyperglycemia (high blood sugar) and hypoglycemia. Tight glycemic control, while beneficial, can increase the risk of hypoglycemia, which can be particularly dangerous in the elderly, leading to falls and cognitive impairment. Therefore, target ranges might be less strict:

  • Fasting: 80-100 mg/dL
  • Postprandial: Less than 160 mg/dL
  • A1C: Less than 7.5% (or higher, based on individual health)

Comorbidities, functional status, and cognitive function are important factors in determining the appropriate blood sugar targets in older adults. How To Manage Blood Sugar 10 Lifestyle Changes That Work

Factors Affecting Blood Sugar Levels

Several factors can influence blood sugar, including:

  • Diet: The types and amounts of carbohydrates you consume.
  • Physical Activity: Exercise can lower blood sugar.
  • Stress: Stress hormones can raise blood sugar.
  • Medications: Certain medications can affect blood sugar levels.
  • Illness: Being sick can impact blood sugar control.
  • Hydration: Dehydration can lead to higher blood sugar readings.
  • Sleep: Poor sleep habits can affect insulin sensitivity and blood sugar.

What to Do If Your Blood Sugar Is High

If your blood sugar is consistently high, it's important to take action:

  1. Consult Your Doctor: Discuss your concerns and get professional guidance.
  2. Monitor Your Blood Sugar Regularly: Track your levels to identify patterns.
  3. Adjust Your Diet: Reduce your intake of sugary and processed foods.
  4. Increase Physical Activity: Aim for at least 30 minutes of moderate exercise most days of the week.
  5. Stay Hydrated: Drink plenty of water throughout the day.
  6. Manage Stress: Practice relaxation techniques like meditation or deep breathing.
  7. Take Medications as Prescribed: Follow your doctor's instructions carefully.

What to Do If Your Blood Sugar Is Low

Hypoglycemia, or low blood sugar, can be dangerous, especially for those taking insulin or certain diabetes medications. Symptoms include shakiness, sweating, dizziness, confusion, and rapid heartbeat. If you suspect your blood sugar is low:

  1. Check Your Blood Sugar: Confirm the low reading with a meter.
  2. Eat or Drink Something Sweet: Consume 15 grams of fast-acting carbohydrates (e.g., glucose tablets, fruit juice, or hard candy).
  3. Wait 15 Minutes: Recheck your blood sugar after 15 minutes.
  4. Repeat if Necessary: If your blood sugar is still low, repeat the process.
  5. Follow Up: Once your blood sugar is back to normal, eat a snack or meal to prevent it from dropping again.

Preventing Blood Sugar Imbalances

Preventive measures can significantly reduce the risk of blood sugar imbalances. These include:

  • Balanced Diet: Focus on whole foods, including fruits, vegetables, lean proteins, and whole grains.
  • Regular Exercise: Engage in physical activity to improve insulin sensitivity and manage weight.
  • Adequate Sleep: Prioritize getting 7-9 hours of quality sleep each night.
  • Stress Management: Practice relaxation techniques to lower stress levels.
  • Regular Check-ups: Visit your doctor for routine screenings and monitoring.

The Role of Technology in Blood Sugar Management

Advances in technology have made blood sugar management easier and more accurate. Continuous glucose monitors (CGMs) and insulin pumps offer real-time data and automated insulin delivery, providing better control and improved quality of life for many people with diabetes.

Conclusion

Understanding blood sugar levels and their implications is a crucial aspect of health management. This blood sugar levels chart by age provides a useful guideline, but it is essential to consult with a healthcare professional for personalized advice. By monitoring your blood sugar, making lifestyle modifications, and working closely with your healthcare team, you can maintain optimal blood sugar levels and improve your overall health.

References and Further Reading