For most adults with diabetes, a normal blood sugar target is 80 to 130 mg/dL before meals and under 180 mg/dL two hours after eating. These are the ranges recommended by major diabetes organizations, but your specific targets may be tighter or more relaxed depending on your age, how long you’ve had diabetes, and your overall health.
Standard Targets for Adults
The two numbers most people with diabetes track are fasting (or pre-meal) blood sugar and post-meal blood sugar. Before a meal, the goal is 80 to 130 mg/dL. Two hours after the start of a meal, the goal is below 180 mg/dL. These ranges apply to most non-pregnant adults with either type 1 or type 2 diabetes.
These targets are wider than what someone without diabetes would see. A person without diabetes typically stays between 70 and 100 mg/dL when fasting, and rarely goes above 140 mg/dL after eating. The broader range for people with diabetes reflects the reality that tightly controlling blood sugar increases the risk of dangerous lows, especially for people on insulin or certain medications.
A1C: The Bigger Picture
Daily readings give you a snapshot, but your A1C tells you how well your blood sugar has been managed over roughly three months. For most people with diabetes, the A1C goal is 7% or less. That roughly translates to an average blood sugar of about 154 mg/dL. With lifestyle changes and medication, some people can get their A1C below 6.5%, which is closer to the non-diabetic range.
A few conditions can make A1C results unreliable. Severe anemia, kidney failure, liver disease, blood disorders like sickle cell anemia, and even certain medications (including some HIV drugs) can falsely raise or lower the number. If any of these apply to you, your doctor may rely more heavily on daily glucose readings or continuous monitor data instead.
Time in Range: A Newer Metric
If you use a continuous glucose monitor (CGM), you’ll see a metric called “time in range.” This measures what percentage of the day your blood sugar stays between 70 and 180 mg/dL. Most people should aim for at least 70% of readings in that window, which works out to roughly 17 out of 24 hours per day.
Time in range captures something A1C and finger sticks can miss: how much your blood sugar swings throughout the day. Two people can have the same A1C, but one might have steady glucose levels while the other ricochets between highs and lows. Time in range rewards stability, and many diabetes specialists now consider it just as important as A1C.
When Targets Are Different During Pregnancy
Pregnancy calls for significantly tighter blood sugar control because high glucose levels can affect fetal development. The recommended targets for pregnant women with diabetes are:
- Fasting and before meals: 70 to 95 mg/dL
- One hour after eating: 110 to 140 mg/dL
- Two hours after eating: 100 to 120 mg/dL
For those using a CGM during pregnancy, the recommended range is 63 to 140 mg/dL. These tighter windows mean more frequent monitoring and, for many women, more aggressive insulin adjustments throughout the pregnancy.
Targets for Children
Children with diabetes generally aim for daytime readings of 71 to 180 mg/dL, with a slightly wider bedtime range of 101 to 200 mg/dL. The higher bedtime target provides a buffer against overnight lows, which are harder to catch in sleeping children. Targets can shift based on a child’s age, size, activity level, and how much their pancreas still produces insulin.
Relaxed Targets for Older Adults
For older adults, especially those with multiple health conditions or frailty, the priority shifts from tight control to avoiding dangerous lows. Hypoglycemia in an elderly person can cause falls, confusion, and hospitalization, so the risks of aggressive blood sugar management often outweigh the benefits.
The adjusted A1C targets reflect this shift. For older adults who are functionally dependent (needing help with daily activities), an A1C of 7.1 to 8.0% is often appropriate. For those who are frail or living with dementia, the target widens further to 7.1 to 8.5%. For people at the end of life, A1C testing is generally not recommended at all. The focus shifts entirely to keeping the person comfortable, avoiding symptoms from very high blood sugar, and preventing any episodes of low blood sugar.
Recognizing Dangerous Lows and Highs
Knowing your target range also means knowing when you’ve left it. Blood sugar below 70 mg/dL is considered low (hypoglycemia), and you’ll typically feel it: shakiness, sweating, confusion, irritability, or sudden hunger. Below 54 mg/dL is a severe low and a medical emergency. At that level, you may not be able to treat yourself and could lose consciousness.
On the high end, occasional readings above 180 mg/dL after a large meal aren’t unusual, but consistently staying above that range signals that your management plan needs adjustment. Persistent highs over weeks and months are what drive the long-term complications of diabetes, including nerve damage, kidney problems, and vision loss. A single high reading isn’t cause for alarm, but a pattern of them is worth acting on.
Why Your Target May Differ
The numbers above are starting points. Your doctor may set a lower target if you’re young, recently diagnosed, and at low risk for hypoglycemia. They may set a higher target if you have a long history of diabetes, don’t feel symptoms when your blood sugar drops, or have other serious health conditions. The “right” blood sugar level for a diabetic is ultimately the one that balances long-term health with day-to-day safety, and that calculation is different for everyone.