For most adults with diabetes, the target blood sugar range is 80 to 130 mg/dL before meals and under 180 mg/dL one to two hours after eating. These are the general targets recommended by the American Diabetes Association, but your individual goals may be higher or lower depending on your age, overall health, and risk of low blood sugar episodes.
Before and After Meals
The two numbers that matter most in daily blood sugar management are your pre-meal and post-meal readings. Before eating, your blood sugar should fall between 80 and 130 mg/dL. After a meal, it naturally rises as your body processes carbohydrates, but it should stay below 180 mg/dL when measured one to two hours after your first bite. For context, a person without diabetes would typically be below 140 mg/dL at that same post-meal check.
These targets assume you’re a non-pregnant adult. They’re meant to keep blood sugar controlled enough to prevent long-term complications (nerve damage, kidney problems, vision loss) while also leaving enough room to avoid dangerously low blood sugar. If you’re consistently hitting numbers in these ranges, your diabetes management is on track.
A1C: The Bigger Picture
While daily finger sticks or continuous glucose monitors capture snapshots, your A1C gives a broader view. It reflects your average blood sugar over the past two to three months, expressed as a percentage. For most adults with diabetes, the goal is an A1C below 7%. That corresponds roughly to an average blood sugar of about 154 mg/dL.
Not everyone should aim for the same A1C. Children and adolescents with diabetes now have a tighter recommended target of below 6.5%, based on updated 2025 guidelines. Healthy older adults, on the other hand, often do well with an A1C below 7.5%. And for older adults who are frail, have multiple chronic conditions, or have a life expectancy under ten years, an A1C of 8% or even 8.5% may be more appropriate. At that level, the average blood sugar runs around 200 mg/dL. The reasoning is straightforward: in these patients, aggressive blood sugar lowering creates a real risk of dangerous low blood sugar episodes, and the long-term benefits of tight control are less relevant.
Targets During Pregnancy
Pregnancy tightens every blood sugar target significantly. If you have type 1 or type 2 diabetes and become pregnant, the goal before meals is 70 to 95 mg/dL, and one to two hours after eating, blood sugar should stay between 100 and 120 mg/dL or lower. These are noticeably stricter than the standard targets because even modestly elevated blood sugar during pregnancy can affect fetal development.
Gestational diabetes (diabetes that develops during pregnancy) follows similar but slightly more relaxed goals: below 95 mg/dL before meals and 120 to 140 mg/dL after eating. These numbers require more frequent monitoring and careful meal planning, but they return to normal ranges for most people after delivery.
Time in Range
If you use a continuous glucose monitor, you’ll see a metric called “time in range,” which tracks the percentage of your day spent between 70 and 180 mg/dL. For most adults with type 1 or type 2 diabetes, the goal is to spend at least 70% of the day in that range. That works out to roughly 17 hours per day. If you’re at higher risk for low blood sugar episodes, a more realistic goal is at least 50% of the day in range.
Time in range captures something that A1C misses: variability. Two people can have the same A1C, but one might have steady blood sugar all day while the other swings between extreme highs and lows. A high time in range means your blood sugar stays more stable, which generally means fewer symptoms and lower risk of complications.
When Numbers Are Too Low
Blood sugar management isn’t just about avoiding highs. Lows are dangerous in the short term in ways that highs aren’t. Blood sugar below 70 mg/dL is considered low, and you’ll likely feel it: shakiness, sweating, confusion, irritability. Below 54 mg/dL is classified as severe low blood sugar, which can cause seizures or loss of consciousness and requires immediate help from someone else.
Low blood sugar is more common in people taking insulin or certain oral medications that stimulate insulin production. It’s one of the main reasons that targets are loosened for older adults and others at higher risk. Avoiding lows is just as important as avoiding highs, and your target range is designed to balance both.
Why Targets Vary From Person to Person
Your doctor may set targets that look different from the standard ranges, and that’s normal. Several factors influence where your personal targets land:
- Age: Younger people generally get tighter targets because they have more years ahead in which complications could develop. Older adults get more flexibility.
- How long you’ve had diabetes: Someone newly diagnosed may be able to achieve tighter control more easily than someone who has had diabetes for decades.
- Risk of low blood sugar: If you’ve had frequent or severe lows, your targets will be raised to give you a wider safety margin.
- Other health conditions: Heart disease, kidney disease, or cognitive decline can shift the risk-benefit calculation toward less aggressive blood sugar goals.
- Type of treatment: People managing diabetes with diet alone face almost no risk of lows, so their targets can be tighter. Those on insulin need more room.
For healthy older adults on medication, a practical fasting target is 140 to 150 mg/dL. For those who are frail or have significant health problems, fasting levels of 160 to 170 mg/dL are considered acceptable. These numbers are deliberately higher than what you’d see for a younger, healthier adult, because the priority shifts from preventing complications decades away to preventing a dangerous low blood sugar episode today.