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Intermittent Fasting Calculator

Calculate your exact eating and fasting windows for popular intermittent fasting protocols like 16:8 or 20:4 based on your desired wake or meal times.

#Fasting#Diet#Health#Weight Loss#Biohacking
Enter values above to see the result.

How does the Intermittent Fasting Calculator work?

The Formula

Start Fast + Hours
Example: Start fast at 8 PM + 16 hours = 12 PM next day.

Frequently Asked Questions

Most popular?

16:8 (16 hrs fasting, 8 hrs eating).