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Intermittent Fasting Calculator

Intermittent Fasting Calculator

Plan your fasting and eating windows across popular IF protocols such as 16:8, 18:6, OMAD and more.

Fasting Schedule

Pick a protocol and your first meal time.

16h fast · 8h eating window

Eating Window

12:00 to 20:00
Start eating12:00
Stop eating20:00
Fast begins20:00
Fast ends (next meal)12:00
Eating window8hours
Fasting duration16hours

Intermittent fasting is not for everyone, particularly those who are pregnant, breastfeeding, underweight, or with certain medical conditions. Consult your physician first.

Plan your fasting and eating windows with popular fasting methods. Helps support fat loss, metabolic health, and disciplined eating habits.

How this is calculated

Protocols: 16:8 · 18:6 · 20:4 · OMAD (23:1) · 14:10

Eating window = first meal + N hours. Fast = remaining 24 − N hours.

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Disclaimer

These calculators provide general health and fitness estimates based on the information entered and standard scientific formulas. They are intended for educational and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment. Results may vary based on individual health conditions, body composition, lifestyle, medications, and clinical factors. Always consult a qualified healthcare professional or doctor before making significant changes to your diet, exercise routine, medication, or health management plan.