Healthy Blood Sugar Levels: A Simple Chart
You checked your blood sugar. Now you are staring at the number, wondering if it is good, bad, or somewhere in between.
Here is a simple chart to help. Different numbers matter depending on when you checked, and whether you have diabetes.
Normal Blood Sugar, No Diabetes
| When Checked | Normal Range |
|---|---|
| Fasting, first thing in the morning | 70 to 99 mg/dL |
| 2 hours after eating | Below 140 mg/dL |
| Random check, any time of day | Below 140 mg/dL |
Blood Sugar Targets With Diabetes
These targets are different. They allow a bit more room, since the goal is steady control, not a perfect match to someone without diabetes.
| When Checked | Typical ADA Target |
|---|---|
| Fasting, before meals | 80 to 130 mg/dL |
| 1 to 2 hours after a meal | Below 180 mg/dL |
Prediabetes Range
| When Checked | Prediabetes Range |
|---|---|
| Fasting | 100 to 125 mg/dL |
| 2 hours after eating | 140 to 199 mg/dL |
Targets for Adults Over 65
Older adults often get a wider target range. This helps lower the risk of blood sugar dropping too low, which can be more dangerous with age.
| Health Status | Typical Target |
|---|---|
| Healthy, few other conditions | Similar to general adult targets |
| Complex health, several conditions | 70 to 180 mg/dL is a common range |
Ask your doctor what range fits your specific health picture.
Why the Numbers Are Not One-Size-Fits-All
A blood sugar chart is a helpful reference. It is not a diagnosis, and it is not your personal target.
Your doctor sets your real target based on your health, your age, your medicine, and your risk of a low reading.
What Affects Your Number
- What and how much you just ate
- Stress or illness
- Sleep the night before
- Physical activity
- Timing of your medicine
One high or low number is rarely a big deal on its own. A pattern over time tells a bigger story.
What to Do This Week
- Write down your target range from your doctor, if you know it.
- Check your blood sugar at consistent times, so numbers are easier to compare.
- Note anything unusual, like a big meal or poor sleep, next to any surprising readings.
- Bring your log to your next doctor visit.
The Bottom Line
Normal, prediabetes, and diabetes ranges all differ. Your own target may look different still.
Use this chart as a starting reference. Let your doctor set the number that actually applies to you.
Want a simpler way to understand type 2 diabetes or prediabetes? Join Type 2 Made Simple and get the free Type 2 Clarity Kit, a plain-English starter kit to help you understand your numbers, make easier food choices, and feel more prepared for doctor visits.
Frequently Asked Questions
What is a normal fasting blood sugar level?
For people without diabetes, 70 to 99 mg/dL is normal. People with diabetes often have a slightly wider target, often 80 to 130 mg/dL.
What is a healthy blood sugar level 2 hours after eating?
Below 140 mg/dL is typical for people without diabetes. People with diabetes often aim for below 180 mg/dL.
Do blood sugar targets change with age?
Yes. Older adults, especially those with other health conditions, often get a wider target range for safety.
What if my number does not match this chart?
One reading rarely tells the whole story. Track patterns over time and share them with your doctor.
What is the difference between prediabetes and diabetes ranges?
Prediabetes fasting levels run 100 to 125 mg/dL. Diabetes is generally diagnosed at 126 mg/dL or higher on a fasting test, confirmed by your doctor.
This article is for general education only and is not medical advice. Always talk with your healthcare provider or a registered dietitian before making major changes to your diet, medication, or diabetes care plan.
