Blood Sugar 167 mg/dl — Too High? Fasting & After Eating
Where 167 mg/dl sits — adjust to your situation
167 mg/dl as a fasting reading
Diabetes range
A fasting reading of 126 mg/dl or higher falls into the diabetes range. Diagnosis requires a repeat test on another day — take this result to your doctor.
Fasting = no food for at least 8 hours, typically first thing in the morning. More on fasting readings.
167 mg/dl after eating
Prediabetes range
Between 140 and 199 mg/dl two hours after a meal suggests impaired glucose tolerance, the post-meal form of prediabetes.
Guidelines measure 2 hours after the start of a meal. More on post-meal readings.
A sensor value of 167 still counts as in range
Continuous glucose monitors sort every reading into bands. The middle band, called time in range, runs from 70 to 180 mg/dl. A 167 lands inside it. The reports most CGM apps produce do not judge single values, though. They show what share of the whole day falls into each band, usually over the last 14 days.
ADA and international CGM experts suggest these goals for most adults with diabetes:
- More than 70 % of readings between 70 and 180
- Less than 25 % above 180
- Less than 5 % above 250
- Less than 4 % below 70, and less than 1 % below 54
Turning percentages into hours of the day
Percentages are easier to picture as time. A day has 1,440 minutes, so each percent is about 14 minutes.
- 70 % in range means at least 16 hours and 48 minutes a day between 70 and 180.
- 25 % above 180 allows up to 6 hours a day above 180.
- 5 % above 250 allows a little over an hour a day above 250.
Seen this way, the goal is not perfection. Six hours above 180 is a lot of room for meals. What the goal asks is that high stretches stay limited and do not become the default state of the day.
Improving time in range by 5 % adds roughly 72 minutes a day in range. That is often within reach with one change, such as a walk after dinner or a smaller breakfast starch.
What fills the time above 180
When the slice above 180 is too big, the cause usually shows up in the daily overlay graph, sometimes called the ambulatory glucose profile. It stacks all days on top of each other by time of day. Common shapes include:
- A tall hump after breakfast or dinner, pointing to meal size, meal type or insulin timing.
- A slow climb through the night, pointing to the evening meal or the overnight medicine.
- A wide spread at one time of day, meaning some days are fine and others not, often tied to routine, work shifts or weekends.
Fixing the largest hump first usually moves the percentages the most. Changing one thing at a time also makes it clear which change actually worked when you review the next report.
Where a 167 fits into the report
Readings in the 160s add to time in range, but they sit close to its upper edge. If most of your in-range time is in the 150s to 170s, the percentage may look good while the average stays high. Reports therefore also show mean glucose and a glucose management indicator, an estimate of A1C based on sensor data. Look at all three together. The report is most reliable when the sensor was worn for most of the 14 days. How CGM averages relate to lab A1C is explained on the A1C and blood sugar page.
Measured right after exercise?
There is no official range for readings taken during or just after a workout, so the two classifications above do not apply to them. How exercise moves blood sugar.
How 167 mg/dl compares to a typical day
Typical day without diabetes; your reading is the horizontal line — higher than a typical day reaches two hours after a meal; brief one-hour peaks this high are common.
What to do with a reading of 167 mg/dl
Book a doctor's appointment to confirm with a lab test (fasting glucose or A1C). If you are already diagnosed, this reading belongs in your log for your care team.
What actually moves the number: How to lower blood sugar, Foods that steady your glucose and Exercise and blood sugar.
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Questions about 167 mg/dl
Is 167 mg/dl blood sugar normal?
It depends on when you measured. Fasting, 167 mg/dl is diabetes range (normal fasting range: 70–99 mg/dl). Two hours after a meal it is prediabetes range (normal post-meal range: 70–139 mg/dl).
What is 167 mg/dl in mmol/L?
167 mg/dl equals 9.3 mmol/L. Divide mg/dl by 18 to convert (used in the UK, Canada, Australia and most of Europe).
Does one reading of 167 mg/dl mean I have diabetes?
No single home reading is a diagnosis. Guidelines require a second abnormal lab result, either a different test from the same blood draw or a repeat on another day (fasting glucose, an oral tolerance test, or A1C). But a reading like this is exactly the reason those tests exist — take it to your doctor.
How accurate is a home reading of 167 mg/dl?
Home meters are allowed an error of ±15 mg/dl below 100 mg/dl and ±15 % from 100 up (ISO 15197), so a displayed 167 can correspond to a true value anywhere from 142 to 192 mg/dl. Fasting, the entire window stays inside the diabetes range band — this classification is robust even to meter error.
What A1C would 167 mg/dl correspond to?
If 167 mg/dl were your average glucose over three months, it would work out to an A1C of about 7.4 % — at or above the 6.5 % diabetes threshold. A single reading is not an average — but the conversion shows what this level would mean as a habit. How the two measures relate: A1C and blood sugar.
My report shows 66 % in range. Is that bad?
It is a little below the usual goal, not a crisis. Look next at where the missing time went: above 180 or below 70. Time below range matters for safety, so a team usually deals with lows first. If the extra time is above 180, finding the one meal or time of day that causes most of it is often enough to reach 70 %.
Do people without diabetes use the same range?
The 70 to 180 range was set for people with diabetes. People without diabetes who wear a sensor usually spend nearly the whole day inside it, with most readings well below 140. A CGM showing long stretches above 180 in someone without a diagnosis is a reason to ask for a proper lab test.
BloodSugarEasy — blood sugar reading report
Reading: 167 mg/dl (9.3 mmol/L)
Fasting classification: Diabetes range · After-meal classification: Prediabetes range
Reference: ADA criteria, reviewed 2026-11-03 · https://bloodsugareasy.com/blood-sugar-167/
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