Blood sugar 121 mg/dL
121 mg/dL is above the normal fasting range and within the normal range up to two hours after a meal.
Where 121 sits
If this was a fasting reading
Prediabetes rangeAs a fasting reading, 121 mg/dL falls in the prediabetes range of 100 to 125 mg/dL. It is 22 mg/dL above the top of the normal range and 5 mg/dL below the 126 mg/dL diagnostic threshold.
If this was after a meal
NormalOne to two hours after eating, 121 mg/dL is within the normal range: readings under 140 mg/dL are typical, and this one is 19 mg/dL under that line.
Across the day
Across the day, 121 mg/dL sits inside 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 121 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.