Blood Sugar Simulators

Visualize How Insulin Works

Interactive tools to help people with diabetes understand how insulin, food, and exercise interact to affect blood glucose.

Meal Dosing
Bolus Timing Simulator

See how the timing of your insulin bolus relative to meal start affects blood glucose. Learn about pre-bolusing and timing for different meal types.

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Meal Dosing
Split Bolus Simulator

Explore how splitting a bolus into two doses at different times can better match insulin action to the extended absorption of high-fat meals.

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Pump Users
Temp Basal Simulator

For insulin pump users: see how adjusting your basal rate before, during, and after exercise affects blood glucose management.

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Exercise
Exercise Timing Simulator

Understand how exercise lowers blood glucose and how the timing of food and insulin around workouts affects your response.

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Exercise
Extended Exercise Simulator

Plan for long workouts of 4+ hours. Model pre-exercise fueling, in-exercise nutrition, pump temp basals, and post-exercise recovery.

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Exercise
High-Intensity Exercise Simulator

See how sprints and intense intervals raise blood sugar during effort, then create a delayed low risk hours later — the opposite of moderate exercise.

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Full Day
24-Hour Diabetes Simulator

Combine boluses, meals, exercise, and temp basals across a full day. See how decisions stack and compound — from morning dawn phenomenon to overnight sensitivity.

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For educational purposes only. These simulators are visual learning tools — not medical devices or dosing calculators. They show relative effects, not actual blood sugar numbers. Talk to your care team before making any changes to your insulin or exercise routine.

Keep These Tools Free.

The Blood Sugar Simulators are free for everyone — no account, no paywall, no ads. Building and maintaining them takes real resources. If these tools have helped you, consider supporting the team behind them.

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