Blood sugar 364 mg/dL
364 mg/dL is above the normal fasting range and well above the normal after-meal range.
A reading this high deserves attention today
Drink water, follow your correction plan if you have one, and check for ketones if your care plan calls for it. Recheck within a couple of hours to see the direction of travel.
Where 364 sits
If this was a fasting reading
Diabetes rangeAs a fasting reading, 364 mg/dL is 238 mg/dL past the 126 mg/dL threshold labs use when diagnosing diabetes. One meter reading is not a diagnosis; labs confirm with repeat testing.
If this was after a meal
Diabetes rangeTwo hours after eating, 364 mg/dL is 164 mg/dL past the 200 mg/dL threshold labs use when diagnosing diabetes. A single reading is a data point, not a diagnosis.
Across the day
Across the day, 364 mg/dL is 184 mg/dL above the 70 to 180 mg/dL band that time in range is usually measured against.
What to do next
One reading is a data point. The useful question is whether 364 mg/dL is your usual or an outlier, and only a short run of readings can answer that: check at the same times for a week and look at the pattern, not any single number.
If fasting numbers keep landing high, start with how to lower fasting blood sugar. If meals are the pattern, see after-meal blood sugar spikes.
Pregnancy uses stricter targets. If you are pregnant, the ranges on this page do not apply to you; your care team will give you the numbers to aim for.
Nearby readings
General information, not medical advice. Reference ranges follow the ADA diagnostic criteria; a single meter reading is not a diagnosis, which requires laboratory testing, usually confirmed on two occasions. See how we calculate.
Stop looking numbers up one at a time
A page can tell you what a reading means in general. Your own log tells you what it means for you: log a reading in seconds and SteadyRange shows your time in range, estimated A1C, and the patterns behind them, on a private log you control.