Intermittent Fasting Calculator

Intermittent Fasting Calculator

Free tool for calculating intermittent fasting schedules

The Intermittent Fasting Calculator is a free, no-registration online tool that helps you plan the next meal and fasting window.

It adapts to your needs, offering popular methods like 16:8 (most popular), 18:6, 20:4, or fully custom fasting windows from 1–23 hours.

The intuitive interface lets you set your schedule based on your last meal or desired next meal time, with real-time validation and helpful prompts.

Get instant results with a beautiful visual 24-hour timeline that clearly shows your fasting and eating windows.

The responsive design ensures perfect functionality on mobile, tablet, and desktop devices.

Export your personalized schedule as text for quick sharing, as an image for social media, or as a PDF for printing and reference. No registration required - just visit and start calculating immediately.

Lifestyle · Fitness · Health

Features

Multiple Fasting Methods: 16:8, 18:6, 14:10, 20:4, OMAD, and custom durations
Flexible Time Input: Based on last meal or desired next meal time
Visual 24-Hour Timeline: Color-coded fasting and eating periods
Export Options: Text, image, and PDF export functionality
Responsive Design: Works perfectly on mobile, tablet, and desktop
No Registration: Start using immediately without sign-up
Educational Content: Comprehensive fasting information and guides
Modern UI: Glassmorphism design with smooth animations
Accessibility: Keyboard navigation and screen reader support

Use Cases

Make intermittent fasting accessible to everyone, regardless of technical skill
Provide instant, accurate calculations without any barriers
Offer beautiful, shareable results that could motivate and inspire
Include educational content to support users' health journeys
Work seamlessly across all devices for maximum convenience

Submit Bro

Let us submit your SaaS, info-product etc on 70 high traffic directories

Comments

Matthew Jiang

I created the Intermittent Fasting Calculator to solve a common problem I experienced personally. When I started intermittent fasting, I found myself constantly doing mental math to figure out my eating windows, which was both time-consuming and error-prone. Existing solutions were either too complex, or lacked the visual clarity I needed.

Upvote Reply