Sports Calculators
Pace, heart rate, and performance tools. Track your athletic progress.
Start here
Featured calculators
Common starting points in sports calculators, chosen from the tools already available in this category.
Pace Calculator
Calculate your running or cycling pace.
Heart Rate Zones Calculator
Calculate Zone 2, max-HR, and Karvonen heart-rate-reserve zones for general fitness planning.
Max Heart Rate Calculator
Estimate your maximum heart rate based on age.
Race Predictor
Predict your race times for various distances.
Popular workflows
Useful paths through this category
Follow a short workflow when one calculator naturally leads to another.
Running training path
Check pace, compare heart-rate zones, and estimate race outcomes.
Category note
Sports outputs are estimates. Use personal coaching or clinical guidance for medical concerns, injury risk, or performance planning.
What this category helps with
Estimate running pace, heart-rate zones, maximum heart rate, and race predictions for training context.
Common tasks
- Calculate running pace.
- Estimate heart-rate zones.
- Estimate maximum heart rate.
- Predict race times from known performances.
Why Calzivo makes it easier
Sports calculators make training numbers easier to compare, while keeping outputs framed as estimates rather than coaching or medical advice.
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Frequently Asked Questions
Questions about pace, heart-rate estimates, race predictions, and training assumptions.