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Blood Sugar Log – Online Record & Chart Glucose Levels

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Blood Sugar Log & Chart

Record, track and visualize your glucose levels over time. All data stored locally in your browser.

Add New Reading
mg/dL
Glucose Trend

Target range shaded: 70–180 mg/dL (3.9–10.0 mmol/L)

Log Entries
Date Time Category Glucose (mg/dL) Note

No records yet. Start by adding your first reading above.

Frequently Asked Questions

Normal fasting blood sugar is usually 70–99 mg/dL (3.9–5.5 mmol/L). After meals (2 hours) it should stay under 140 mg/dL (7.8 mmol/L). Individual targets may vary; always follow your doctor's advice.

It depends on your treatment plan. Type 1 diabetes may require 4–10 checks per day; type 2 diabetes often needs 1–2 checks per day. Discuss with your healthcare provider to find the right schedule for you.

A log helps you see patterns, understand how food, exercise and medication affect your levels, and make informed decisions. It’s an essential tool for preventing complications and improving your diabetes management.

mg/dL is used mainly in the US; mmol/L is used in most other countries. To convert: mg/dL / 18.018 = mmol/L, or mmol/L × 18.018 = mg/dL. You can switch the display unit anytime with the toggle above.

Yes! Click the "Export CSV" button to download your readings as a file that can be opened in Excel, Google Sheets, or any spreadsheet program.

Absolutely. All data is stored only in your browser's local storage – nothing is uploaded to any server. You can clear the data at any time with the "Clear All" button.
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