Your race-day plan, dialed to the mile
Elevation-adjusted pacing. Gel-by-gel fueling. One printable sheet.
FuelCenter builds personalized race strategies for marathons, ultras, and triathlons. Set your goal time, pick your gel, and get a mile-by-mile plan that accounts for the actual course.
Everything you need for race day
Free tools. No signup. No paywall.
Fueling Calculator
Gel-by-gel fueling plan for any distance. Pick your brand, set your duration, get a printable timeline.
Open tool →Race Guides
Course-specific pace and fuel strategies for 8 major races with elevation-adjusted splits.
Open tool →Pace Calculator
Calculate pace, finish time, or distance. Enter any two and get the third.
Open tool →Heat Adjustment
See how temperature and humidity affect your pace and fueling plan.
Open tool →Hydration Calculator
Estimate fluid and sodium needs based on body weight and conditions.
Open tool →Race Time Predictor
Predict your finish time at any distance from a recent race result.
Open tool →Race-specific strategies
Not generic advice. Plans built for the actual course.
Boston Marathon
Marathon (26.2 mi)Newton Hills fueling strategy and elevation-adjusted pace splits.
View guide →NYC Marathon
Marathon (26.2 mi)Five-borough pacing with bridge climbs and Queensboro fueling plan.
View guide →Ironman Kona
Ironman (140.6 mi)Heat-adapted fueling for the bike and Energy Lab run strategy.
View guide →Western States 100
100 MilesCanyon heat fueling, crew access points, and altitude adjustments.
View guide →How It Works
Three steps. One race strategy.
Pick your race
Choose from 8 major races or enter custom settings. We load the course elevation profile automatically.
Set your goals
Enter your finish time, pacing strategy, and gel brand. We calculate terrain-adjusted splits and fueling timing.
Print your race sheet
Mile-by-mile pace splits and gel timing on one page. Tape it to your arm.
Stop guessing your race-day plan.
Every tool on FuelCenter is free. No accounts. No ads. Just science-backed tools for runners who take fueling seriously.
Build Your Race Strategy