Observed arrival · 2026-09-07
A Calculator Shelf for Endurance Athletes
A multilingual collection of free calculators for swimming, cycling, running, triathlon, training, nutrition, and race prediction.
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The site organizes its tools around four recurring endurance questions: what pace to train at, how hard the effort really is, what race time is possible, and how terrain or conditions will change the result. Inputs range from 200/400/1000-m swim tests and Cooper tests to cycling power, gradient, humidity, altitude, and race distance. Its nutrition section extends beyond calculation into minute-by-minute session plans and week-by-week carbohydrate-tolerance training.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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