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Disclaimer

The pacvivo calculator returns mathematical estimates based on the values you enter. Results are informational and educational only.

Race time predictions use the Riegel formula and standard distance conversions. Actual performance depends on course, weather, fitness at race day, fueling and pacing, among many other factors. Calculated results are not a guarantee of performance.

Nothing on this site constitutes medical, coaching, nutritional or professional advice. Consult a qualified professional before starting or modifying a training or nutrition plan.

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By using this tool, you accept that results are provided "as is" and you are responsible for your own training decisions.