The Ultimate Blood Sugar Levels Chart: Normal, Prediabetes & Diabetes Ranges by Age Understanding blood sugar levels is crucial for maintaining go...
The Ultimate Blood Sugar Levels Chart: Normal, Prediabetes & Diabetes Ranges by Age
Understanding blood sugar levels is crucial for maintaining good health, especially as we age. This article provides a comprehensive blood sugar levels chart, covering normal ranges, prediabetes, and diabetes ranges, categorized by age groups. Whether you're monitoring your own levels or caring for a loved one, this guide will offer valuable insights.
Why Monitor Blood Sugar Levels?
Blood sugar levels, also known as blood glucose levels, refer to the amount of glucose in your blood. Glucose is your body's primary source of energy, derived from the food you eat. Maintaining optimal blood sugar levels is essential because:
- Energy Levels: Stable blood sugar levels ensure consistent energy throughout the day, preventing energy crashes.
- Organ Function: High or low blood sugar levels can damage vital organs, including the heart, kidneys, and eyes.
- Diabetes Prevention: Monitoring helps in early detection of prediabetes and diabetes, allowing for timely intervention.
- Weight Management: Balanced blood sugar can aid in weight management by preventing insulin resistance.
Understanding the Terminology
Before diving into the blood sugar levels chart, let's clarify some key terms:
- Fasting Blood Sugar (FBS): Blood sugar level measured after an overnight fast (typically 8 hours).
- Postprandial Blood Sugar (PPBS): Blood sugar level measured two hours after eating a meal.
- HbA1c (Glycated Hemoglobin): Average blood sugar level over the past 2-3 months.
- mg/dL (Milligrams per Deciliter): Unit of measurement for blood sugar levels in the United States.
- mmol/L (Millimoles per Liter): Unit of measurement for blood sugar levels in most other countries.
Blood Sugar Levels Chart by Age
This section provides a detailed blood sugar levels chart for different age groups, including normal ranges, prediabetes, and diabetes ranges.
Related reading: Are Your Blood Sugar Levels Normal A Guide For Non Diabetics
For Adults (18 Years and Older)
Category | Fasting Blood Sugar (mg/dL) | 2-Hour Postprandial (mg/dL) | HbA1c (%) |
---|---|---|---|
Normal | Less than 100 | Less than 140 | Less than 5.7% |
Prediabetes | 100 to 125 | 140 to 199 | 5.7% to 6.4% |
Diabetes | 126 or higher | 200 or higher | 6.5% or higher |
For Children (6-17 Years)
Maintaining appropriate blood sugar levels is equally important in children. Here's a guide to blood sugar ranges for children aged 6-17.
Category | Fasting Blood Sugar (mg/dL) | 2-Hour Postprandial (mg/dL) | HbA1c (%) |
---|---|---|---|
Normal | 70 to 140 | Less than 140 | Less than 5.7% |
Prediabetes | Consult with a doctor. Usually slightly higher than normal range. | 140 to 199 | 5.7% to 6.4% |
Diabetes | 126 or higher | 200 or higher | 6.5% or higher |
For Elderly (65 Years and Older)
As we age, blood sugar management becomes increasingly important. Here's a guide to blood sugar ranges for the elderly.
Category | Fasting Blood Sugar (mg/dL) | 2-Hour Postprandial (mg/dL) | HbA1c (%) |
---|---|---|---|
Normal | 70 to 100 | Less than 140 | Less than 5.7% |
Prediabetes | 100 to 125 | 140 to 199 | 5.7% to 6.4% |
Diabetes | 126 or higher | 200 or higher | 6.5% or higher |
Factors Affecting Blood Sugar Levels
Several factors can influence blood sugar levels. Awareness of these factors can help in managing your levels more effectively:
Related reading: The Ultimate Guide To Understanding Your Blood Sugar Levels Chart Included
- Diet: High-carbohydrate and sugary foods can cause a rapid spike in blood sugar levels.
- Physical Activity: Exercise helps lower blood sugar by increasing insulin sensitivity.
- Stress: Stress hormones can raise blood sugar levels.
- Medications: Certain medications, such as steroids and some diuretics, can affect blood sugar.
- Illness: Infections and illnesses can cause blood sugar to fluctuate.
- Age: As we age, our bodies may become less efficient at regulating blood sugar.
- Hydration: Dehydration can concentrate glucose in the blood, leading to higher readings.
Tips for Maintaining Healthy Blood Sugar Levels
Adopting a healthy lifestyle is key to maintaining stable blood sugar levels. Here are some practical tips:
- Balanced Diet: Focus on whole grains, lean proteins, healthy fats, and plenty of fruits and vegetables.
- Regular Exercise: Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
- Hydration: Drink plenty of water to stay hydrated, as dehydration can impact blood sugar levels.
- Stress Management: Practice stress-reduction techniques such as meditation, yoga, or deep breathing exercises.
- Consistent Meal Times: Eat meals at regular intervals to avoid extreme fluctuations in blood glucose levels.
- Limit Sugary Drinks and Processed Foods: Reduce your intake of sugary beverages and highly processed foods, which can lead to spikes in blood sugar.
- Regular Monitoring: If you have diabetes or prediabetes, monitor your blood sugar levels regularly as advised by your healthcare provider.
- Consult a Healthcare Professional: Work with a healthcare provider to develop a personalized plan for managing your blood sugar levels.
When to See a Doctor
Related reading: Hypoglycemia Warning Signs How To Manage Low Blood Sugar Safely
It's crucial to consult a healthcare professional if you experience any of the following:
- Frequent high or low blood sugar readings: Consistent abnormal blood sugar levels warrant medical attention.
- Symptoms of diabetes: Increased thirst, frequent urination, unexplained weight loss, and fatigue.
- Symptoms of hypoglycemia: Shakiness, sweating, confusion, and dizziness.
- Family history of diabetes: Increased risk requires regular screening and monitoring.
Understanding Blood Sugar Conversion: mg/dL to mmol/L

In some countries, blood sugar levels are measured in mmol/L (millimoles per liter) rather than mg/dL (milligrams per deciliter). Here's how to convert between the two:
- mg/dL to mmol/L: Divide mg/dL by 18 (approximately).
- mmol/L to mg/dL: Multiply mmol/L by 18 (approximately).
For example, a blood sugar level of 100 mg/dL is approximately 5.5 mmol/L.
The Role of Diet in Blood Sugar Management
Diet plays a pivotal role in blood sugar management. Choosing the right foods and controlling portion sizes can significantly impact your blood sugar levels. Consider the following dietary guidelines:
- Low Glycemic Index (GI) Foods: Choose foods with a low GI, which are digested more slowly and cause a gradual rise in blood sugar.
- Fiber-Rich Foods: Include plenty of fiber-rich foods like whole grains, fruits, vegetables, and legumes. Fiber helps regulate blood sugar levels.
- Healthy Fats: Incorporate healthy fats from sources like avocados, nuts, and olive oil. Avoid trans fats and limit saturated fats.
- Lean Proteins: Consume lean sources of protein such as chicken, fish, tofu, and legumes. Protein helps stabilize blood sugar levels and promote satiety.
- Portion Control: Pay attention to portion sizes to prevent overeating, which can lead to spikes in blood sugar.
How to Test Your Blood Sugar Levels
Blood sugar testing is essential for individuals with diabetes and those at risk. Here's a general overview of how to test your blood sugar levels:
- Gather Supplies: You'll need a glucose meter, test strips, lancet device, and alcohol swabs.
- Wash Hands: Wash your hands thoroughly with soap and water and dry them.
- Prepare Lancet Device: Insert a new lancet into the lancet device.
- Select Fingertip: Prick the side of your fingertip with the lancet device.
- Apply Blood: Gently squeeze your finger to obtain a small drop of blood. Apply the blood to the test strip.
- Insert Test Strip: Insert the test strip into the glucose meter.
- Read Results: The glucose meter will display your blood sugar level.
- Dispose of Supplies: Properly dispose of the used lancet and test strip.
Conclusion
Monitoring blood sugar levels and understanding the normal, prediabetes, and diabetes ranges for your age group is essential for maintaining overall health. By following a balanced diet, exercising regularly, managing stress, and working closely with your healthcare provider, you can effectively manage your blood sugar levels and reduce your risk of diabetes-related complications. Use the blood sugar levels chart provided in this article as a reference, but always consult with a healthcare professional for personalized advice and treatment.