| What it does | Free Karvonen formula heart rate zone calculator
| Free EZ grader chart and easy grade calculator for teachers and students
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| Stage | 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 | - 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
| - Instant Quick Grade & EZ Grader Test Chart
- Customizable Standard and Plus/Minus Grading Scales
- Weighted Course Grade & Final Exam Simulator
- Printable & Downloadable PDF Grading Charts
- Offline PWA Utility Support
- GPA calculations for semester and cumulative grades
- Grade curve calculator with multiple curving methods
- CGPA to percentage converter for 25 universities
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| What makes it different | - 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
| - Free with no sign-up required
- Calculations run entirely in your browser with no data uploaded
- Works offline as a Progressive Web App
- Print charts or save as PDF without site navigation
- Transparent mathematical formulas documented and tested for accuracy
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 11 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 19 | 0 |
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| Citation Flow (Majestic) | 25 | 17 |
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| Referring domains (Majestic) | 40 | 3 |
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CalculateMyHeartRate
Easy Grade Tool