For most adults with type 2 diabetes, the target blood sugar level is 80 to 130 mg/dL before meals and below 180 mg/dL two hours after eating. These numbers are higher than what you’d see in someone without diabetes, where fasting blood sugar typically falls between 70 and 99 mg/dL. The goal isn’t to match non-diabetic levels perfectly but to stay within a range that prevents both immediate symptoms and long-term complications.
Target Ranges Before and After Meals
The two numbers that matter most in day-to-day management are your fasting (pre-meal) reading and your post-meal reading. Before eating, your blood sugar should land between 80 and 130 mg/dL. Two hours after the start of a meal, it should be below 180 mg/dL. These targets apply to most non-pregnant adults with type 2 diabetes.
For context, a person without diabetes typically has a fasting blood sugar of 70 to 99 mg/dL, and their post-meal numbers rarely climb above 140 mg/dL because their body produces enough insulin to keep glucose tightly controlled. With type 2 diabetes, your body either doesn’t produce enough insulin or doesn’t use it efficiently, so the accepted targets are wider. Hitting these ranges consistently is what reduces the risk of nerve damage, kidney problems, vision loss, and cardiovascular disease over time.
What Your A1C Number Means
While finger-stick readings give you a snapshot, your A1C reflects average blood sugar over the past two to three months. For most people with type 2 diabetes, the goal is an A1C of 7% or less. Some people can reach below 6.5% with lifestyle changes and medication, but that isn’t the right target for everyone.
An A1C of 7% corresponds roughly to an average blood sugar of about 154 mg/dL. Each percentage point represents roughly a 28 to 29 mg/dL shift in average glucose. So dropping from 8% to 7% means your daily averages came down by about 30 mg/dL, which makes a meaningful difference in complication risk.
When Targets Are Adjusted Higher
Not everyone benefits from pushing their A1C as low as possible. Tighter control increases the risk of hypoglycemia (dangerously low blood sugar), and for some people the harms outweigh the benefits. A target A1C of 7% to 8% is often more appropriate for older adults, people with a shorter life expectancy, or those with other serious chronic conditions. For adults over 80 or those living in long-term care, the priority shifts from hitting a specific number to simply avoiding the symptoms of high blood sugar, like excessive thirst, frequent urination, and fatigue.
A stricter target may be considered for someone who is otherwise healthy and expected to live at least 15 more years, since the benefits of tight control accumulate over a long time horizon. Your targets should reflect your full health picture, not just your diabetes.
Time in Range for CGM Users
If you use a continuous glucose monitor (CGM), you’ll encounter a metric called Time in Range, or TIR. This measures the percentage of your day spent between 70 and 180 mg/dL. The recommended goal is to stay in that range at least 70% of the time, which works out to roughly 17 hours out of every 24.
TIR is useful because it captures the full picture of your glucose patterns, including overnight dips and post-meal spikes, that a few finger-stick readings per day can miss. If your TIR is consistently above 70%, that generally aligns well with an A1C near or below 7%.
When Blood Sugar Drops Too Low
Low blood sugar (hypoglycemia) is classified in three levels. Level 1 is a reading below 70 mg/dL. You might feel shaky, sweaty, or lightheaded, but you can usually treat it yourself with fast-acting carbohydrates like juice or glucose tablets. Level 2 is below 54 mg/dL, where confusion, blurred vision, and difficulty functioning become more likely. Level 3 is severe hypoglycemia, meaning you need someone else’s help to recover.
Hypoglycemia is more common in people taking insulin or certain oral medications that stimulate insulin production. If you’re managing type 2 diabetes with diet alone or with medications that don’t push insulin levels up, your risk of lows is much smaller.
When Blood Sugar Climbs Too High
Hyperglycemia often produces no noticeable symptoms until blood sugar exceeds 180 to 200 mg/dL. Above that threshold, you may notice increased thirst, frequent urination, blurred vision, and fatigue. A reading that stays above 240 mg/dL, especially with symptoms like nausea or vomiting, signals a need for prompt medical attention.
In rare cases, type 2 diabetes can lead to a condition called hyperosmolar hyperglycemic state, where blood sugar climbs above 600 mg/dL. This is a medical emergency that typically develops over days or weeks, often triggered by illness or infection. It’s most common in older adults and can cause severe dehydration, confusion, and loss of consciousness.
How Often to Check Your Blood Sugar
How frequently you need to test depends largely on how you manage your diabetes. If you take insulin, you may need to check several times a day. People on multiple daily insulin injections are often advised to test before meals and at bedtime. If you use a long-acting insulin once or twice a day, testing before breakfast and occasionally before dinner or at bedtime may be sufficient.
If you manage type 2 diabetes with non-insulin medications, you may not need daily testing at all. Your healthcare provider will typically use periodic A1C tests (every three to six months) to track how well your treatment plan is working. That said, occasional home testing can still be helpful for understanding how specific meals, exercise, or stress affect your glucose levels. Even a few readings a week can reveal useful patterns.