Blood sugar tracker
Log a reading in five seconds. It saves on your device, shows your trend and average, and prints clean for your next appointment.
Readings save on this device, so the log is here when you come back.
Targets vary by person, age and medication. Agree yours with your own care team. Full guide: Prediabetes: The Ten-Year Warning
If you are buying a meter
Any major-brand glucose meter is accurate enough for home tracking. The real cost is the strips, so compare strip prices before choosing the meter.
Buying through this link supports the free library with a small commission. It never changes a pick.
Saved here, it also updates your health score and your record.
Common questions
What should my blood sugar be?
Common reference points for adults without diabetes: fasting under 100 mg/dL (5.6 mmol/L) and under 140 mg/dL (7.8 mmol/L) two hours after meals. Targets for people with diabetes are set individually with their care team, and are often looser in older adults. Agree yours with your own doctor.
How accurate is the estimated A1c?
It is an estimate from your average readings using the standard ADA formula. Finger-prick readings miss the hours you do not test, so treat it as a preview, not a lab result.
Where is my data stored?
The log saves in your browser on this device. Use the CSV download or print button to take it to an appointment.
When is a reading an emergency?
Below 54 mg/dL (3.0 mmol/L) needs fast sugar now. Above 300 mg/dL (16.7 mmol/L) with vomiting, deep breathing, confusion or drowsiness needs urgent medical care.
What should blood sugar be after eating?
For most people without diabetes, under 140 mg/dL (7.8 mmol/L) two hours after a meal; with diabetes, the common target is under 180 mg/dL (10 mmol/L). Fasting, most people run 70 to 99 mg/dL. Single readings swing with the meal, stress and sleep, which is why the tracker's trend line tells you more than any one number.