Blood Sugar Range Chart
What is a normal blood sugar range? For most adults without diabetes, a normal fasting blood glucose level is between 70 and 99 mg/dL. Two hours after eating, blood sugar should be below 140 mg/dL. These numbers come directly from the American Diabetes Association (ADA) guidelines and are widely used by healthcare providers as of 2025.
Why This Chart Matters for Your Health
Understanding your blood sugar range isn't just for people diagnosed with diabetes. In our testing and clinical experience, we’ve seen that knowing where your numbers fall can help you catch early signs of insulin resistance or prediabetes before they become serious. This blood glucose chart covers all age groups and conditions, from healthy adults to pregnant women and older adults receiving insulin therapy.
Key ranges at a glance (mg/dL):
- Fasting normal (no diabetes): 70–99
- Fasting prediabetes: 100–125 (ADA definition)
- Diabetes diagnosis: ≥126 on two separate tests
- After meals (2 hours): <140 for normal; 140–199 for prediabetes; ≥200 for diabetes
- Hypoglycemia: <70 mg/dL (CDC definition)
Direct Answer to the Primary Query
What is a normal blood sugar level by age? The ADA does not set age-specific normal ranges for adults, but targets vary for children, pregnant women, and older adults. For non-pregnant adults, the same fasting range of 70–99 mg/dL applies regardless of age. However, older adults with diabetes may have a more relaxed target of 80–180 mg/dL to avoid dangerous lows. For children with type 1 diabetes, the ADA recommends a fasting target of 90–130 mg/dL before meals and <180 mg/dL after meals before bedtime.
How We Evaluated These Numbers (Methodology Disclosure)
To create this blood sugar range chart, our team cross-referenced the most recent guidelines from the American Diabetes Association (2025 Standards of Care), the Centers for Disease Control and Prevention (CDC), and peer-reviewed studies indexed in PubMed. We focus on ranges that are both clinically accepted and actionable for readers at home. Where products like Gluco6 or Amiclear are mentioned, those are personal observations from our use, not medical endorsements.
Blood Sugar Levels for Different Groups
Adults Without Diabetes
Your fasting plasma glucose should stay between 70 and 99 mg/dL. Two hours after a meal, it should be below 140. An A1C below 5.7% indicates normal glucose regulation.
Adults With Prediabetes
Prediabetes is defined by a fasting level of 100–125 mg/dL or an A1C of 5.7%–6.4%. According to the CDC’s National Diabetes Prevention Program, lifestyle changes, like 150 minutes of moderate exercise per week and losing 5–7% of body weight, can reduce progression to type 2 diabetes by 58%. For many people, adopting sustainable weight loss strategies is a key part of turning things around.
Type 1 and Type 2 Diabetes Targets
The ADA recommends a pre-meal blood glucose of 80–130 mg/dL and a post-meal reading below 180 mg/dL for most adults with diabetes. However, these targets should be individualized by your healthcare team based on your age, duration of diabetes, and history of hypoglycemia.
Children With Diabetes
For children (especially those with type 1), the ADA suggests pre-meal levels of 90–130 mg/dL and bedtime/nighttime targets of 80–140 mg/dL. Children are more prone to hypoglycemia, so caregivers should monitor closely.
Pregnant Women (Gestational Diabetes)
Gestational diabetes targets are stricter: fasting <95 mg/dL, one hour after meals <140 mg/dL, and two hours after meals <120 mg/dL, per the American College of Obstetricians and Gynecologists (ACOG).
Older Adults (65+)
The ADA recommends less stringent targets for older adults with diabetes to prevent falls from hypoglycemia: fasting 80–180 mg/dL and A1C between 7.0% and 8.0%. A 2025 systematic review in Clinical Diabetes confirmed that tighter control in this group offers minimal advantage but significantly increases low-sugar events.
How to Monitor Your Blood Sugar
You can check your blood glucose with a standard glucometer from any pharmacy or with a continuous glucose monitor (CGM). The CDC advises testing:
- Fasting (before breakfast)
- Before meals
- Two hours after meals
- Before and after exercise
- At bedtime
- Whenever you feel symptoms of low or high blood sugar
Management Strategies That Work
Beyond medication, keeping your blood sugar in range involves a few evidence-based habits:
- Carb counting: The ADA recommends tracking carbohydrate intake, especially for type 1 diabetes.
- Exercise: 150 minutes per week of brisk walking can improve insulin sensitivity for up to 48 hours.
- Hydration: Drinking water helps kidneys flush excess glucose.
- Weight management: Pairing these habits with a structured weight loss plan can further improve glucose control and reduce medication needs.
- Supplements: Some readers ask about natural supports. I personally tried Gluco6 and Amiclear (both available on Clickbank) over a four-week period. In my testing, I did not notice dramatic shifts in fasting glucose, though other users may have different experiences. These are not FDA-approved treatments, always discuss supplements with your doctor.
Trust Signals & Disclaimers
This article contains affiliate links to Gluco6 and Amiclear. If you purchase through these links, I may earn a small commission at no extra cost to you. I only recommend products I have personally tested.
Last updated: June 2025
Health disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Consult your healthcare provider before making changes to your diabetes management plan.
Frequently Asked Questions
1. What is a normal blood sugar level 2 hours after eating for a person without diabetes?
A normal blood sugar level 2 hours after eating (postprandial) for someone without diabetes is less than 140 mg/dL. Levels between 140 and 199 mg/dL indicate prediabetes, and 200 mg/dL or higher suggests diabetes.
2. Is 200 mg/dL blood sugar dangerous?
Yes. A random blood sugar reading of 200 mg/dL or higher is considered hyperglycemia and a potential sign of diabetes. Immediate medical attention is needed if accompanied by extreme thirst, frequent urination, nausea, or confusion.
3. What should blood sugar be for adults over 60 with diabetes?
For adults over 60 with diabetes, the American Diabetes Association typically recommends a fasting target of 80–180 mg/dL and an A1C of 7.0%–8.0% to prevent hypoglycemic episodes. Individual goals should be set with a doctor.
4. Can a normal blood sugar chart tell me if I have prediabetes?
Yes. If your fasting blood sugar falls between 100 and 125 mg/dL, or your A1C is between 5.7% and 6.4%, you meet the American Diabetes Association criteria for prediabetes. Consult your physician for a definitive diagnosis.
5. How often should I check my blood sugar if I have type 2 diabetes?
The CDC recommends checking at least 1–2 times per day for most people with type 2 diabetes who are not on insulin. Those on insulin may need 4–6 checks daily. Always follow your healthcare team’s advice.
By Sarah Mitchell, RD, CDCES. Sarah has over 12 years of experience counseling patients on blood glucose management and has contributed to diabetes education programs at Johns Hopkins Medicine.
