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Your Complete Guide to Normal Blood Sugar Levels (with a Printable Chart)
18 Sep 2025 By Arpitha K. Ketty, M.D.

Your Complete Guide to Normal Blood Sugar Levels (with a Printable Chart)

Understanding your blood sugar levels is crucial for maintaining good health, especially if you're managing diabetes or at risk of developing it. This comprehensive guide breaks down what constitutes normal blood sugar, how to monitor it, and factors that can influence your readings. We've also included a handy printable chart to help you keep track of your blood sugar levels.

What is Blood Sugar and Why Does it Matter?

Blood sugar, also known as glucose, is the primary source of energy for your body. It comes from the food you eat, and it's transported through your bloodstream to cells throughout your body. Insulin, a hormone produced by the pancreas, helps glucose enter those cells.

Maintaining normal blood sugar levels is vital because consistently high or low levels can lead to serious health complications. High blood sugar (hyperglycemia) can damage organs over time, increasing the risk of heart disease, kidney disease, nerve damage, and vision problems. Low blood sugar (hypoglycemia) can cause dizziness, confusion, and, in severe cases, loss of consciousness.

Understanding Normal Blood Sugar Ranges

Normal blood sugar levels vary depending on the time of day and whether you've eaten recently. Generally, blood sugar is measured in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L). Here's a breakdown of target ranges for people without diabetes, according to the American Diabetes Association (ADA):

  • Fasting Blood Sugar (After at least 8 hours of not eating): Less than 100 mg/dL (5.6 mmol/L)
  • 2-Hour Postprandial (2 hours after eating): Less than 140 mg/dL (7.8 mmol/L)

For people with diabetes, target ranges may be slightly different, and it's essential to discuss personalized goals with your healthcare provider. How To Achieve True Blood Sugar Balance For More Energy And Focus

Factors Affecting Blood Sugar Levels

Several factors can influence your blood sugar levels, including:

  • Food: The type and amount of carbohydrates you consume have a significant impact. Simple sugars cause a rapid spike, while complex carbohydrates are digested more slowly.
  • Physical Activity: Exercise can lower blood sugar levels because your muscles use glucose for energy.
  • Medications: Certain medications, like insulin or oral diabetes medications, directly affect blood sugar.
  • Stress: Stress hormones can raise blood sugar levels.
  • Illness: Being sick can also elevate blood sugar.
  • Sleep: Lack of sleep can impair insulin sensitivity, leading to higher blood sugar.
  • Hormones: Hormonal changes during menstruation, pregnancy, or menopause can affect blood sugar levels in women.
  • Dehydration: Dehydration can concentrate glucose in the blood, leading to higher readings.

How to Monitor Your Blood Sugar

Monitoring your blood sugar regularly is essential, especially if you have diabetes. There are several ways to do this:

  • Blood Glucose Meter: This involves pricking your finger with a lancet and using a small sample of blood to measure your blood sugar level on a meter.
  • Continuous Glucose Monitor (CGM): This device continuously tracks your glucose levels through a sensor inserted under your skin. It provides real-time readings and alerts for high or low blood sugar.
  • A1C Test: This blood test provides an average of your blood sugar levels over the past 2-3 months. It's usually performed by a healthcare professional.

Understanding A1C Levels

The A1C test measures your average blood sugar levels over the past 2-3 months by determining the percentage of red blood cells that have glucose attached to them. The higher your A1C level, the higher your average blood sugar levels have been. The 5 Minute Habit After Meals To Achieve Better Blood Sugar Balance

Here's a general guideline for A1C levels:

  • Normal: Below 5.7%
  • Prediabetes: 5.7% to 6.4%
  • Diabetes: 6.5% or higher

Like with regular glucose readings, your individual A1C goal may differ from the standard values; it's best to consult with your doctor. The 5 Minute Habit After Meals That Can Dramatically Improve Blood Sugar Control

Blood Sugar Levels Chart (Printable)

Here's a handy chart summarizing normal blood sugar ranges:

Category Fasting Blood Sugar (mg/dL) 2-Hour Postprandial Blood Sugar (mg/dL) A1C
Normal Less than 100 Less than 140 Below 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

This chart is for general informational purposes only. Please consult with your healthcare provider for personalized blood sugar goals.

Tips for Maintaining Healthy Blood Sugar Levels

Here are some strategies for maintaining healthy blood sugar:

  • Eat a Balanced Diet: Focus on whole, unprocessed foods, including fruits, vegetables, lean protein, and whole grains. Limit sugary drinks and processed carbohydrates.
  • Engage in Regular Physical Activity: Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
  • Maintain a Healthy Weight: Losing even a small amount of weight can improve insulin sensitivity.
  • Manage Stress: Practice relaxation techniques like meditation, yoga, or deep breathing exercises.
  • Get Enough Sleep: Aim for 7-8 hours of quality sleep each night.
  • Stay Hydrated: Drink plenty of water throughout the day.
  • Monitor Your Blood Sugar Regularly: If you have diabetes, follow your doctor's recommendations for blood sugar monitoring.
  • Take Medications as Prescribed: If you're on medication for diabetes, take it as directed by your healthcare provider.

When to See a Doctor

It's important to see a doctor if you experience any of the following:

  • Frequent high or low blood sugar readings.
  • Symptoms of hyperglycemia (excessive thirst, frequent urination, blurred vision).
  • Symptoms of hypoglycemia (sweating, shakiness, dizziness, confusion).
  • Unexplained weight loss.
  • Increased hunger or fatigue.
  • Slow-healing sores or infections.
  • Numbness or tingling in your hands or feet.

Conclusion

Managing your blood sugar levels is essential for your overall well-being. By understanding normal ranges, monitoring your levels, and adopting healthy lifestyle habits, you can minimize the risk of complications and live a healthier life. Remember to consult with your healthcare provider for personalized advice and management strategies.

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