| What it does | Free tool to plan your fasting schedule and eating windows with personalized nutrition targets
| Free Karvonen formula heart rate zone calculator
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| Stage | Not given
| Established
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Multiple fasting protocols including 16:8, 14:10, 18:6, 20:4, and OMAD
- Custom fasting hours option
- Personalized daily calorie goals using Mifflin-St Jeor equation
- Daily protein targets based on ISSN standards
- Metabolic milestones tracking ketone switch and autophagy
- Visual timeline of fasting schedule
- Export schedule as image or text
- No signup required
- Related tools including Intermittent Fasting Timer and Template
| - Five personalized training zones based on heart rate reserve
- Accounts for resting heart rate and cardiovascular fitness
- Custom maximum heart rate input from multiple formulas
- No signup required, runs entirely in browser
- Weekly resting heart rate logging and progress tracking
- Zone-specific training guidance for different goals
- Shareable and printable zone results
- Embeddable calculator widget for websites
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| What makes it different | - No signup required to use calculators and export plans
- Personalized targets based on peer-reviewed research formulas
- Tracks metabolic phases like ketone switch and autophagy timing
- Plain-English educational content alongside tools
- Treats outputs as planning estimates with clear safety disclaimers
| - More accurate than age-only formulas, accounting for individual cardiovascular fitness
- Zones adapt as your fitness improves and resting heart rate drops
- Based on 1957 Karvonen research used by coaches and sports scientists
- Independent, no data collection or external servers
- No ads inside the calculator, free to use with optional embedding
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 16 ▲ +1 (up) since last check | 11 ● no change since last check |
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| Trust Flow (Majestic) | 20 | 19 |
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| Citation Flow (Majestic) | 23 | 25 |
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| Referring domains (Majestic) | 83 | 40 |
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Intermittent Fasting Calculator
CalculateMyHeartRate