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Intermittent Fasting Calculator

Calculate your intermittent fasting eating window for 16:8, 18:6, 20:4, and OMAD protocols. Free IF schedule generator.

For the interactive calculator, open the full CalcHealth page.

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Frequently Asked Questions

Which intermittent fasting protocol is best for beginners?

16:8 (fast 16 hours, eat within an 8-hour window) is most popular and easiest for beginners.