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Intermittent Fasting Timer

Track your fasting window with our free timer. Supports popular protocols like 16:8, 18:6, and 20:4 with real-time progress tracking.

Intermittent Fasting Timer

Track your fasting window and see when you can eat

How to Use This Timer

  1. 1

    Choose your protocol

    Select from popular fasting protocols like 16:8, 18:6, 20:4, or set a custom duration.

  2. 2

    Set your start time

    Enter the time of your last meal to begin tracking your fast.

  3. 3

    Track your progress

    Watch your fasting progress and see which metabolic phases you've reached.

  4. 4

    Know when to eat

    See exactly when your eating window opens and closes.

Frequently Asked Questions

What is 16:8 intermittent fasting?

The 16:8 method involves fasting for 16 hours and eating within an 8-hour window. For example, eating between 12pm-8pm and fasting from 8pm-12pm the next day.

What happens during fasting?

During fasting, your body depletes glycogen stores (4-8 hours), begins burning fat for fuel (12+ hours), and may enter ketosis (16+ hours). Autophagy (cellular cleanup) increases after 18-24 hours.

Can I drink water while fasting?

Yes! Water, black coffee, and plain tea are generally allowed during fasting as they don't trigger an insulin response. Avoid anything with calories or sweeteners.