Intermittent Fasting Calculator

Calculate your fasting window, calories, and daily schedule in seconds.

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How Intermittent Fasting Works

Intermittent fasting is an eating pattern that alternates between periods of eating and fasting.
Instead of focusing on what foods to eat, it emphasizes when you eat.

During the fasting window, your body switches from using glucose as its primary energy source to burning stored fat.
Many people follow intermittent fasting to support weight management, metabolic health, and daily routine consistency.

This calculator helps you quickly determine your fasting window, eating schedule, and estimated calorie needs based on your personal details.

Popular Intermittent Fasting Protocols

  • 16:8 Intermittent Fasting
  • 18:6 Fasting Method
  • 20:4 Warrior Diet
  • OMAD (One Meal a Day)

Safety & Medical Disclaimer

This intermittent fasting calculator is provided for informational and educational purposes only.
It is not intended as medical advice, diagnosis, or treatment.

Individual health conditions vary. Before starting any fasting routine or making significant dietary changes,
you should consult with a qualified healthcare professional, especially if you are pregnant, nursing,
have diabetes, or any existing medical conditions.

Use this tool at your own discretion and responsibility.