Observed arrival · 2026-10-08
HealthCalcPlus’s race-time predictor
A browser-based calculator estimates race finishes, paces, and splits from a recent result.
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●Pro
◎Niche
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ƒJS
- For
- Runners comparing race fitness across distances
- Worth noticing
- With two race results, it solves a personal slowdown exponent; values outside 0.90–1.40 trigger a fallback to 1.06.
Field notes
The form accepts distances in kilometres or miles and includes an optional second race result for calibrating the slowdown exponent. The page says results outside the 0.90–1.40 range fall back to the 1.06 default. Even and negative split options are offered, and separate linked calculators cover elevation-adjusted marathon splits and printable half-marathon pace bands.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
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✦PrettyNotable craft visible
◎NicheUnusually specific use
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