18:6 Fasting Window Calculator

18:6 Fasting Window Calculator. 18 hours fast, 6 hours eat. Fast, accurate, private.

18:6 protocol — 18h fast, 6h eating window

Start fasting at

Quick start

Eating window opens

12:00

16h fast → 8h eat

Eating window closes20:00

Next fast starts20:00

Steps

18:6 fasting window calculator — plan your 18-hour fast and 6-hour eating period.

18:6 protocol — 18h fast, 6h eating window

Are results official?

No — quick estimates only. Confirm with your bank or provider.

Is data saved?

No. Calculations run in your browser.

Where is the full tool?

Each satellite links back to the main hub calculator.