What Is a Normal Blood Sugar Range? A Printable Chart for Fasting and After Meals

13 Sep 2025

What Is a Normal Blood Sugar Range? A Printable Chart for Fasting and After Meals

Understanding your blood sugar range is essential for maintaining good health, especially if you have diabetes or are at risk of developing it. This article will explain what normal blood sugar levels are, provide a printable chart for easy reference, and offer insights into what influences these levels. We’ll cover both fasting blood sugar and post-meal (after eating) readings.

Why Monitor Your Blood Sugar?

Blood sugar, or glucose, is the primary source of energy for your body. Insulin, a hormone produced by the pancreas, helps glucose from the food you eat enter your cells to be used for energy. When you have diabetes, either your body doesn't make enough insulin or can’t effectively use the insulin it does make, leading to high blood sugar levels (hyperglycemia). Over time, high blood sugar can lead to serious health problems, including:

  • Heart disease
  • Kidney disease
  • Nerve damage (neuropathy)
  • Vision problems
  • Slow-healing sores

On the other hand, low blood sugar (hypoglycemia) can also be dangerous, causing symptoms like shakiness, confusion, and even loss of consciousness. Regularly monitoring your blood glucose can help you manage your condition and prevent complications.

Understanding Blood Sugar Levels

Blood sugar levels are typically measured in milligrams per deciliter (mg/dL). Knowing your target blood sugar levels allows you and your healthcare provider to adjust your diet, exercise, and medication to maintain optimal health. There are two primary measurements to understand: fasting blood sugar and post-meal blood sugar.

Fasting Blood Sugar

Fasting blood sugar is the glucose level in your blood after not eating or drinking anything (except water) for at least eight hours. This measurement gives a baseline idea of how well your body is managing glucose overnight or between meals. It is typically taken first thing in the morning before breakfast.

Post-Meal Blood Sugar (Postprandial)

Post-meal blood sugar, also known as postprandial blood sugar, is the glucose level in your blood one to two hours after eating a meal. This measurement indicates how your body responds to the food you've consumed. It can help you understand how specific foods affect your blood sugar levels.

Normal Blood Sugar Range Chart

Below is a chart summarizing the general guidelines for normal, prediabetic, and diabetic blood sugar ranges. Remember that individual targets may vary, so consult with your healthcare provider to determine what's best for you. A Beginner S Guide To Blood Sugar Insulin And How They Work Together

Category Fasting Blood Sugar (mg/dL) Post-Meal (1-2 hours after eating) (mg/dL)
Normal Less than 100 Less than 140
Prediabetes 100 to 125 140 to 199
Diabetes 126 or higher 200 or higher

Disclaimer: This chart is for informational purposes only and should not be used as a substitute for professional medical advice.

Factors Affecting Blood Sugar Levels

Many factors can influence your blood sugar levels. Being aware of these can help you better manage your glucose. Some of the most common factors include: Understanding Your A1C Test A Simple Guide To Hba1C Levels

  • Food: The type and amount of carbohydrates you consume have the most significant impact. High-carbohydrate foods tend to raise blood sugar more quickly and dramatically than proteins or fats.
  • Physical Activity: Exercise helps lower blood sugar as your muscles use glucose for energy. Both aerobic exercise (like running or swimming) and resistance training (like lifting weights) can improve insulin sensitivity.
  • Medications: Certain medications, including insulin and oral diabetes drugs, directly affect blood sugar levels. Other medications, such as steroids, can raise blood sugar.
  • Stress: Stress hormones can cause blood sugar to rise. Managing stress through techniques like meditation, deep breathing, or yoga can help.
  • Illness: When you're sick, your body releases hormones that can raise blood sugar.
  • Sleep: Poor sleep can affect insulin sensitivity and blood sugar levels. Aim for consistent and adequate sleep each night.
  • Dehydration: Being dehydrated can concentrate the glucose in your blood, leading to higher readings. Drink plenty of water throughout the day.
  • Menstrual Cycle: Hormonal changes during the menstrual cycle can affect blood sugar levels in women.

Tips for Maintaining Healthy Blood Sugar Levels

Here are some practical tips to help maintain healthy blood sugar levels:

  1. Eat a Balanced Diet: Focus on whole, unprocessed foods, including plenty of fruits, vegetables, lean proteins, and whole grains. Limit sugary drinks, processed foods, and refined carbohydrates.
  2. Monitor Carbohydrate Intake: Pay attention to the amount and type of carbohydrates you eat. Consider using the carbohydrate counting method to manage your intake.
  3. Engage in Regular Physical Activity: Aim for at least 30 minutes of moderate-intensity exercise most days of the week.
  4. Stay Hydrated: Drink plenty of water to help regulate blood sugar.
  5. Manage Stress: Practice stress-reducing techniques such as meditation, yoga, or deep breathing.
  6. Get Enough Sleep: Aim for 7-8 hours of quality sleep each night.
  7. Monitor Blood Sugar Regularly: Check your blood sugar as recommended by your healthcare provider and keep a log of your readings. This information can help you identify patterns and make necessary adjustments to your treatment plan.
  8. Work with a Healthcare Team: Regularly consult with your doctor, a certified diabetes educator, and a registered dietitian to develop a personalized management plan.

When to See a Doctor

It’s important to consult a doctor if you experience frequent high or low blood glucose readings. Additionally, seek medical attention if you have symptoms of:

  • Hyperglycemia (high blood sugar): Frequent urination, increased thirst, blurred vision, fatigue.
  • Hypoglycemia (low blood sugar): Shakiness, sweating, dizziness, confusion, rapid heartbeat.

Early diagnosis and management can help prevent long-term complications and improve your overall quality of life.

Conclusion

Understanding and maintaining a normal blood sugar range is vital for preventing diabetes and managing the condition effectively if you have it. By following a balanced diet, engaging in regular physical activity, managing stress, and monitoring your blood sugar levels, you can keep your glucose within a healthy range. Use the provided chart as a handy reference, but remember to consult with your healthcare provider to determine the best plan for your individual needs. Consistent monitoring and proactive management are the keys to living a healthy life with stable blood glucose. A Dietitian S Guide To The Glycemic Index For Blood Sugar Control

By Dana M. Harris, M.D.