| What it does | Free calculators for marketers, affiliates and store owners
| Free Karvonen formula heart rate zone calculator
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| Stage | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - ROAS calculator with break-even analysis
- CPA and CPM calculator for ad costs
- LTV and CAC calculators for e-commerce
- Affiliate earnings and EPC calculator
- UTM link builder for GA4 tracking
- A/B test significance and sample size calculator
- Shopify profit calculator
- YouTube earnings estimator
- Affiliate Link Checker Chrome extension
| - 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 | - Runs entirely in browser with no signup required
- Private calculations that never leave your device
- Every tool explains formulas, benchmarks and common mistakes
- Completely free with no premium plans
| - 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) | Not checked yet ● no change since last check | 11 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 19 |
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| Citation Flow (Majestic) | 17 | 25 |
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| Referring domains (Majestic) | 2 | 40 |
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GrowthMath
CalculateMyHeartRate