Our free blood sugar log tracker is a simple digital logbook for people who check their glucose at home with a meter. Readings are saved only in your own browser using local storage, so they stay private and are not uploaded anywhere. Clearing your browser data or using another device will not show the same history.

This blood sugar log tracker is a record-keeping aid, not a diagnostic or treatment tool. Diabetes can only be diagnosed by a healthcare professional using laboratory tests. If you have diabetes, follow the targets your care team has set for you, which may differ from the general ranges below.

Blood Sugar Ranges Used by the Tracker

To convert mg/dL to mmol/L, divide by 18. For example, 99 mg/dL is about 5.5 mmol/L and 126 mg/dL is 7.0 mmol/L.

How to Use the Blood Sugar Log Tracker

Here is how to log a reading in the blood sugar log tracker.

Step 1: Choose mg/dL or mmol/L

Select mg/dL (common in the US) or mmol/L (common in the UK, Pakistan, India and many other countries) to match your meter.

Step 2: Enter Your Reading and When You Took It

Type the number from your meter and choose the timing: Fasting, Before Meal, 2 Hours After Meal or Random / Bedtime.

Step 3: Log It and Read the Instant Insight

Click Log Reading. The Latest Reading Insight card shows your value and a coloured label such as Normal or Pre-diabetic.

Step 4: Review Your Recent Logs

Every reading is added to Recent Logs with the date, time, timing and label. The tracker keeps your last 20 readings; use Clear History to start over.

Tips for Accurate Blood Sugar Readings

• Wash and dry your hands before testing; sugar on your fingers can raise the result.
• Use test strips that are in date and stored correctly.
• Test at consistent times so readings can be compared fairly.
• Note meals, exercise, illness and medication changes alongside unusual results.

When to Get Medical Help

• A reading below 70 mg/dL (3.9 mmol/L) with shaking, sweating or confusion: treat a low as advised by your care team.
• Repeated readings above 250 mg/dL (13.9 mmol/L), especially with vomiting or drowsiness.
• Fasting readings that are often 100 mg/dL or higher if you have not been diagnosed; ask your doctor about testing.

Why Use a Blood Sugar Log Tracker?

Patterns matter more than single numbers. A blood sugar log tracker makes patterns easier to spot, such as higher readings after certain meals or in the morning. Bringing your log to appointments helps your doctor or diabetes educator make better decisions about your care.

Frequently Asked Questions