Running pace calculator
Convert distance + time into pace per km/mile and a splits table.
Open tool
Race time predictor
Estimate equivalent 5K/10K/half/marathon times from one known result.
Open tool
Marathon fueling planner
Turn a carb-per-hour target into a schedule you can execute on the move.
Open tool
HYROX time predictor
Estimate finish time from 1k run splits, stations, and transitions.
Open tool
Ironman 70.3 fueling planner
Compute bike + run totals for carbs, sodium, and fluids from your targets.
Open tool
Ultra cutoff planner
Compute the minimum average pace and a buffer estimate for a planned pace.
Open tool
Coaching beta
Get a plan that adapts to your life.
Join the 26weeks.ai TestFlight beta for adaptive coaching, recovery-aware adjustments, and race-week reminders.