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Blood Glucose Log – Pre & Post Meal Readings

Diabetes Health glucose log tracker
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Blood Glucose Log – Pre & Post Meal

Track your blood sugar before and after meals to manage diabetes effectively. All data is stored locally on your device.

Ideal for Type 1, Type 2, gestational diabetes management. Medical reference range shown for mg/dL & mmol/L.

Add New Reading
Please enter a valid number (20-600 mg/dL)
Recorded Readings 0
Date Time Meal Pre-meal mg/dL Post-meal mg/dL Difference Notes
No readings yet. Add your first record above.

Frequently Asked Questions

For non-diabetics: fasting (before meal) typically 70–99 mg/dL (3.9–5.5 mmol/L); 2 hours after a meal less than 140 mg/dL (7.8 mmol/L). Diabetes targets vary; always consult your doctor.

Enter your pre-meal and post-meal blood sugar readings along with date, time, and meal type. The tool calculates the difference automatically and keeps all records stored locally in your browser.

Yes, use the toggle above. All existing readings will be converted automatically (1 mmol/L ≈ 18.018 mg/dL). The tool internally stores values in mg/dL for consistency.

Absolutely. All data stays only on your device using browser local storage. No information is sent to any server. You can clear all data anytime with the "Clear All" button.

The difference (post minus pre) shows how your body responds to food. A large spike may indicate carb sensitivity or insulin adjustment needs. Typical goal: less than 30-50 mg/dL rise.

Currently you can print the page or copy the table. Future updates may include CSV export. However, you can always take a screenshot of the table to share.
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