Blood Sugar Log
Keep a personal log of your blood glucose readings with meal context, get simple status indicators and averages, and export everything to CSV. Everything is stored only in your browser.
Disclaimer: This tool is for general information and record keeping only. It is not medical advice. Please talk to your doctor about your blood sugar readings and targets.
Add a reading
Total readings
0
7-day average
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Latest reading
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Trend — last 14 readings
Bars scale to the highest value shown. Colors match the status badges.
Readings
| Date / time | Reading | Context | Status |
|---|
No readings yet. Add your first reading above.
How to use
- Enter your glucose value and pick the unit you measured in (mg/dL or mmol/L).
- Choose when you measured: fasting, before a meal, after a meal, or at bedtime. The date and time default to now.
- Press Add reading. Your entry is saved in this browser and appears newest first.
- Use the unit toggle to redisplay all readings in the other unit; conversions are automatic.
- Press Export CSV to download your log as a spreadsheet file for your records.
Status bands used
Status is a rough guide based on common reference ranges, shown on the mg/dL scale:
- Fasting / before meal / bedtime: below 100 = normal, 100–125 = elevated, above 125 = high.
- After meal: below 140 = normal, 140–199 = elevated, above 199 = high.
These are general ranges only and may not match your personal targets. Your doctor sets the targets that are right for you.
Your data stays with you
Readings are saved in your browser's local storage on this device. Nothing is sent to a server, and clearing your browser data removes the log.