| 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
| - Country-specific calculators for US, UK, Canada, Australia, New Zealand, South Africa, Ireland, Germany, and Netherlands
- Annual rate guides with tax-year specificity
- Free downloadable log templates in Excel, Google Sheets, and PDF
- Source citations linking calculations to IRS, HMRC, CRA, and ATO publications
- Support for multiple vehicle types and mileage purposes
- Miles and kilometers input support
- Reimbursement policy and form templates
- Direct monitoring of government rate changes and updates
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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
| - Official source citations on every rate and calculation
- No affiliate relationships or commercial sponsorships influencing calculations
- Single workflow from rate lookup to estimate to recordkeeping
- Tax-year specific rates updated annually from official government sources
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