Intermittent Fasting Window Planner

16:8 and friends are just clock math from your last bite — the planner shows first-meal and kitchen-closes times so the window survives real

Quick answer: 16:8 and friends are just clock math from your last bite — the planner shows first-meal and kitchen-closes times so the window survives real life. Free, instant, private — runs entirely in your browser.

Last bite todayPlan

How to use

Fill the fields above — results update as you type.
Adjust any input to compare scenarios instantly.
Nothing is uploaded; everything runs in your browser.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance); content last reviewed September 2026. For decisions that matter, confirm with a licensed professional in your country.

About this tool

16:8 and friends are just clock math from your last bite — the planner shows first-meal and kitchen-closes times so the window survives real life.

FAQ

Intermittent Fasting Window Planner — is it really free?

Yes. No signup, no watermark, no hidden limit — the logic runs entirely in your browser and nothing is uploaded.

Does Intermittent Fasting Window Planner store my inputs?

No. Everything is computed on your device; closing the tab erases it all.

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Your rating stays in this browser (local storage) — nothing is sent to any server.

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The complete fasting window planner guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Fasting Window Planner — Complete Guide, Mistakes & FAQ covers all of it step by step.

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Intermittent Fasting Window Planner

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The complete fasting window planner guide