Decoding Your Results: The Complete Blood Sugar Levels Chart (mg/dL & mmol/L) Understanding your blood sugar levels is crucial for maintaining goo...
Decoding Your Results: The Complete Blood Sugar Levels Chart (mg/dL & mmol/L)
Understanding your blood sugar levels is crucial for maintaining good health, especially if you're managing diabetes or concerned about developing the condition. This article will break down the intricacies of blood sugar levels, providing a comprehensive chart in both milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L). We’ll cover everything from normal ranges to what to do if your levels are consistently too high or too low. Let’s dive in!
What is Blood Sugar and Why Does It Matter?
Blood sugar, also known as glucose, is the main sugar found in your blood. It comes from the food you eat and is your body's primary source of energy. Your body carefully regulates blood sugar levels through insulin, a hormone produced by the pancreas. Insulin acts like a key, allowing glucose to enter your cells to be used for energy.
Maintaining proper blood glucose control is critical. When levels are too high (hyperglycemia), it can lead to long-term complications like nerve damage (neuropathy), kidney damage (nephropathy), cardiovascular disease, and eye damage (retinopathy). Conversely, when levels are too low (hypoglycemia), you can experience symptoms like shakiness, sweating, confusion, and even loss of consciousness.
Understanding the Units: mg/dL vs. mmol/L

Blood sugar levels are typically measured in two units:
Related reading: Common Mistakes To Avoid In Your Diabetes Blood Sugar Log
- mg/dL (milligrams per deciliter): This is the standard unit used in the United States.
- mmol/L (millimoles per liter): This unit is more commonly used in many other parts of the world, including Canada and Europe.
It’s important to understand both units so you can accurately interpret your blood sugar readings from different sources or lab reports. To convert mg/dL to mmol/L, divide the mg/dL value by 18. For example, 100 mg/dL is approximately 5.5 mmol/L. Conversely, to convert mmol/L to mg/dL, multiply the mmol/L value by 18.
The Complete Blood Sugar Levels Chart
Here’s a comprehensive blood sugar levels chart covering normal ranges, prediabetes, and diabetes, for both mg/dL and mmol/L, measured at different times:
Category | Timing | mg/dL (US Standard) | mmol/L (International) | Interpretation |
---|---|---|---|---|
Normal | Fasting (After at least 8 hours of fasting) | Less than 100 mg/dL | Less than 5.6 mmol/L | Healthy **blood glucose** level. |
Normal | 2 hours after eating | Less than 140 mg/dL | Less than 7.8 mmol/L | Healthy **blood glucose** response after a meal. |
Prediabetes | Fasting | 100 to 125 mg/dL | 5.6 to 6.9 mmol/L | Indicates a higher risk of developing type 2 diabetes. Lifestyle changes are recommended. |
Prediabetes | 2 hours after eating | 140 to 199 mg/dL | 7.8 to 11.0 mmol/L | Suggests impaired glucose tolerance. |
Diabetes | Fasting | 126 mg/dL or higher | 7.0 mmol/L or higher | Diagnostic of diabetes. Requires medical evaluation and management. |
Diabetes | 2 hours after eating | 200 mg/dL or higher | 11.1 mmol/L or higher | Indicates poor **blood glucose control**. |
Important Note: These ranges can vary slightly depending on the lab and individual circumstances. Consult with your healthcare provider for a personalized interpretation of your results.
Factors That Can Affect Blood Sugar Levels
Several factors can influence your blood sugar levels:
- Diet: Consuming carbohydrate-rich foods causes a greater increase in blood sugar than protein or fat.
- Physical Activity: Exercise can help lower blood sugar levels as your muscles use glucose for energy.
- Medications: Certain medications, such as steroids and some diuretics, can raise blood sugar levels. Diabetic medications, on the other hand, are designed to lower them.
- Stress: Stress hormones can cause your blood sugar to rise.
- Illness: Being sick can also affect blood sugar levels, often making them higher.
- Dehydration: Dehydration can concentrate glucose in the blood, leading to higher readings.
- Time of Day: Blood sugar levels tend to be higher in the morning due to hormonal changes.
How to Monitor Your Blood Sugar Levels
Related reading: Low Blood Sugar Hypoglycemia Symptoms You Should Never Ignore
If you have diabetes or prediabetes, regular blood sugar monitoring is essential. Here are the most common methods:
- Blood Glucose Meter: A small, portable device that measures the blood sugar level from a small drop of blood obtained by pricking your finger.
- Continuous Glucose Monitor (CGM): A device that continuously monitors your blood glucose levels through a small sensor inserted under the skin. CGMs provide real-time data and can alert you to trends and patterns.
- A1C Test: A blood test that provides an average of your blood sugar levels over the past 2-3 months. This test gives a bigger picture of your blood glucose control compared to a single finger prick.
Your doctor will advise you on the frequency and timing of blood sugar testing based on your individual needs and treatment plan.
What To Do If Your Blood Sugar is High (Hyperglycemia)
If your blood sugar is high, take the following steps:
- Check Your Medications: Ensure you are taking your diabetes medications as prescribed.
- Drink Water: Staying hydrated helps dilute glucose in your blood.
- Exercise (If Appropriate): Physical activity can lower blood sugar, but avoid exercise if you have ketones in your urine (a sign of severe insulin deficiency). Check with your doctor.
- Adjust Your Diet: Limit carbohydrate intake and focus on whole, unprocessed foods.
- Contact Your Doctor: If your blood sugar remains consistently high despite these measures, seek medical advice.
What To Do If Your Blood Sugar is Low (Hypoglycemia)
Related reading: Quick And Healthy Snacks To Prevent Hypoglycemia
If your blood sugar is low, act quickly to prevent serious complications:
- Follow the 15-15 Rule: Consume 15 grams of fast-acting carbohydrates (e.g., glucose tablets, juice, regular soda).
- Wait 15 Minutes: Recheck your blood sugar after 15 minutes.
- Repeat if Necessary: If your blood sugar is still low, repeat the 15-15 rule.
- Eat a Meal or Snack: Once your blood sugar is above 70 mg/dL (3.9 mmol/L), eat a meal or snack to stabilize your levels.
- Seek Medical Attention: If you experience severe symptoms like confusion, loss of consciousness, or seizures, call emergency services immediately.
Lifestyle Changes for Better Blood Sugar Control
Whether you have diabetes, prediabetes, or simply want to maintain healthy blood sugar levels, lifestyle changes play a vital role.
- Balanced Diet: Emphasize whole grains, lean proteins, fruits, and vegetables. Limit processed foods, sugary drinks, and excessive amounts of carbohydrates.
- Regular Exercise: Aim for at least 150 minutes of moderate-intensity aerobic exercise per week.
- Weight Management: Maintaining a healthy weight can significantly improve blood sugar control.
- Stress Management: Practice relaxation techniques like yoga, meditation, or deep breathing to manage stress levels.
- Adequate Sleep: Aim for 7-8 hours of quality sleep each night. Lack of sleep can affect insulin sensitivity.
- Regular Checkups: Schedule regular appointments with your healthcare provider for blood sugar monitoring and overall health assessments.
Conclusion: Empowering Yourself with Knowledge
Understanding your blood sugar levels is a powerful tool for managing your health. By utilizing the blood sugar levels chart provided in this article and incorporating healthy lifestyle habits, you can take control of your blood glucose and reduce your risk of developing diabetes-related complications. Remember to always consult with your doctor for personalized guidance and treatment options. By proactively monitoring and managing your blood sugar, you can live a healthier and more fulfilling life.