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The Ultimate Blood Sugar Levels Chart by Age (and What's Normal for You)

04 Sep 2025 by Kalpana Muthusamy, M.B.B.S., M.D.

The Ultimate Blood Sugar Levels Chart by Age (and What's Normal for You)

Understanding your blood sugar levels is crucial for maintaining good health, especially as you age. Fluctuations outside the normal range can signal serious conditions like diabetes or prediabetes. This comprehensive guide provides a blood sugar levels chart by age, explains what’s considered normal, and offers practical advice on managing your glucose levels.

Why Blood Sugar Levels Matter

Blood sugar, or glucose, is your body's primary energy source. It comes from the food you eat, and it’s regulated by the hormone insulin, which is produced by the pancreas. When this system malfunctions – either through insufficient insulin production (Type 1 diabetes) or insulin resistance (Type 2 diabetes) – your blood sugar levels can become dangerously high (hyperglycemia) or low (hypoglycemia). What Is A Normal A1C Level Understanding Hemoglobin And Eag

Maintaining healthy blood sugar levels helps prevent a range of complications, including:

  • Heart disease
  • Kidney damage
  • Nerve damage (neuropathy)
  • Eye damage (retinopathy)

Blood Sugar Levels Chart by Age

This chart provides general guidelines for normal blood sugar levels at various ages. Remember to consult your healthcare provider for personalized recommendations. Decoding Your Blood Sugar Test Results A Simple Guide To Mg Dl And Mmol L

Age Group Fasting Blood Sugar (mg/dL) 2-Hour Postprandial (After Eating) Blood Sugar (mg/dL) HbA1c (%)
Children (Under 6) 80-180 Up to 200 N/A (Consult doctor)
Children (6-12) 80-120 Up to 140 N/A (Consult doctor)
Teenagers (13-19) 70-150 Up to 140 N/A (Consult doctor)
Adults (20+) - Non-Diabetic 70-99 Less than 140 Less than 5.7%
Adults (20+) - Diabetic 80-130 (Target range, discuss with doctor) Less than 180 (Target range, discuss with doctor) Less than 7% (Target range, discuss with doctor)
Elderly (65+) - General Target 80-180 (Individualized, discuss with doctor) Up to 200 (Individualized, discuss with doctor) Less than 7.5% (Individualized, discuss with doctor)

Key Definitions:

  • Fasting Blood Sugar: Your blood sugar level after not eating for at least eight hours. It's typically measured first thing in the morning.
  • 2-Hour Postprandial Blood Sugar: Your blood sugar level two hours after starting a meal.
  • HbA1c (Hemoglobin A1c): This test provides an average of your blood sugar levels over the past 2-3 months. It gives a broader picture of your blood sugar control.

Understanding Blood Sugar Ranges

Here's a breakdown of what different blood sugar ranges can indicate:

  • Normal Blood Sugar: A fasting blood sugar level between 70-99 mg/dL is generally considered normal for non-diabetic adults. The postprandial level should be below 140 mg/dL.
  • Prediabetes: A fasting blood sugar level between 100-125 mg/dL suggests prediabetes, indicating an increased risk of developing Type 2 diabetes.
  • Diabetes: A fasting blood sugar level of 126 mg/dL or higher on two separate tests, or an HbA1c of 6.5% or higher, typically indicates diabetes.

Important Note: These are general guidelines. Your doctor may have different target ranges based on your overall health and medical history. Decoding Your A1C Chart From Normal To Prediabetes And Diabetes Ranges

Factors Affecting Blood Sugar Levels

Several factors can influence your blood sugar levels, including:

  • Diet: The type and amount of carbohydrates you consume significantly impact your blood sugar.
  • Physical Activity: Exercise helps lower blood sugar by increasing insulin sensitivity.
  • Stress: Stress hormones can raise blood sugar levels.
  • Medications: Certain medications, like steroids, can affect blood sugar.
  • Illness: Being sick can also cause fluctuations in blood sugar.
  • Age: As we age, our bodies may become less efficient at processing sugar.

How to Manage Your Blood Sugar Levels

Maintaining healthy blood sugar levels involves a combination of lifestyle changes and, in some cases, medication. Here are some key strategies:

  1. Eat a Balanced Diet: Focus on whole foods, including fruits, vegetables, lean protein, and whole grains. Limit processed foods, sugary drinks, and excessive amounts of carbohydrates. A registered dietitian can help create a personalized meal plan.
  2. Exercise Regularly: Aim for at least 30 minutes of moderate-intensity exercise most days of the week. This could include brisk walking, swimming, or cycling.
  3. Monitor Your Blood Sugar: If you have diabetes or prediabetes, regular blood sugar monitoring is essential. Your doctor will advise you on how often to test and what your target ranges should be.
  4. Manage Stress: Practice relaxation techniques like deep breathing, meditation, or yoga to help manage stress levels.
  5. Get Enough Sleep: Poor sleep can negatively impact blood sugar control. Aim for 7-8 hours of quality sleep per night.
  6. Take Medications as Prescribed: If you have diabetes, your doctor may prescribe medication to help regulate your blood sugar. Follow their instructions carefully.
  7. Stay Hydrated: Drinking plenty of water helps your kidneys flush out excess sugar.

The Importance of Regular Check-Ups

Regardless of your age or health status, regular check-ups with your doctor are essential. They can assess your blood sugar levels, monitor your overall health, and provide personalized advice on managing your risk factors for diabetes and other health conditions. Early detection and intervention can significantly improve your long-term health outcomes.

When to Seek Medical Attention

It's important to seek immediate medical attention if you experience any of the following symptoms:

  • Severely high blood sugar levels (above 240 mg/dL)
  • Symptoms of hyperglycemia, such as increased thirst, frequent urination, blurred vision, and fatigue
  • Symptoms of hypoglycemia, such as shakiness, sweating, confusion, and dizziness
  • Loss of consciousness

Conclusion

Understanding your blood sugar levels and how they change with age is a crucial step in maintaining your health. By following the guidelines in this blood sugar levels chart, adopting a healthy lifestyle, and working closely with your healthcare provider, you can effectively manage your blood sugar and reduce your risk of developing diabetes and its associated complications. Remember to always consult with your physician or a qualified healthcare professional for personalized medical advice and treatment.

References and Further Reading