Free, open-source endurance fuelling calculator: carbs per hour, fluids, sodium and caffeine. Ideal for running, cycling, hybrid training and ultra-endurance activities.
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Updated
Nov 1, 2026 - TypeScript
Free, open-source endurance fuelling calculator: carbs per hour, fluids, sodium and caffeine. Ideal for running, cycling, hybrid training and ultra-endurance activities.
Free, open-source carb loading calculator: day-by-day carbs in grams, food portions and a pre-race meal for the days before a long race. Perfect for amatheur endurance athletes looking for a simple, science-backed tool to calculate their carb loading needs before a competition or intense, long workout.
Endurance athlete skeletal muscle glycogen depletion modeling, Bergström biopsy kinetic simulation, 36-hour carb-loading protocol, and gastrointestinal distress prevention copilot. Built for GenPark (https://www.genpark.ai).
Sodium loss rate from sweat rate and ambient wet-bulb globe temperature (WBGT), hypotonic vs isotonic electrolyte formulation, and osmolality target. Built for GenPark (https://www.genpark.ai).
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