fuelcenter
Marathon fueling, pace, hydration, heat, carb-loading, and gel-comparison calculators.
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What it can do
What data it sees
Do you need an account
No: the server works without sign-in
Marathon fueling, pace, hydration, heat, carb-loading, and gel-comparison calculators.
Server tool list (7)
Raw names from tools/list. Only developers need these.
| fueling-plan | Build a minute-by-minute race or long-run fueling plan. Returns target carbs/hour, gel count, gel timing schedule, and total carbs. This is the core FuelCenter tool. |
| race-time-predictor | Predict your finish time at common distances (5K through 100 miles) from a recent race result using the Riegel formula. |
| pace-calculator | Given any two of distance, total time, or pace-per-mile, calculate the third. Returns pace per mile, per km, splits, and speed. |
| heat-adjustment | Estimate how temperature and humidity will slow your race pace and change your fluid needs. Returns adjusted pace, slowdown percent, dew point, risk level, and fueling note. |
| hydration | Estimate fluid and sodium needs for a race or long run based on body weight, duration, intensity, temperature, and humidity. |
| carb-loading | Calculate pre-race carb loading targets by race type, body weight, finish time, and experience level. Returns daily carb target, protocol length, total carbs, and pre-race meal size. |
| gel-comparison | Return the FuelCenter gel catalog (SiS Beta Fuel, Maurten, Precision, GU, Tailwind, Spring, Carbs Fuel, neversecond, Huma) with carbs, price, caffeine, weight, and carbs-per-dollar. Optionally sort. |