Running Tools
Free calculators that use the same pacing math as Stride Coach training plans. No sign-up, instant results.
New to training? Read how a plan fits together →
Boston Qualifier Calculator
Your Boston standard, the buffer recent cutoffs demanded, and what the new net-downhill rule does to your target.
Open tool →Training Pace Calculator
Turn a recent race into your easy, marathon, threshold, interval, and repetition paces (VDOT-based).
Open tool →Race Time Predictor
Predict your 5K, 10K, half, and marathon times from one recent result using Riegel’s formula.
Open tool →Fitness Forecast
Project the race times you could run after a training block, grounded in real VDOT-improvement research.
Open tool →Pace Converter
Convert between min/mile, min/km, mph, and kph, and see finish times at any pace.
Open tool →Fueling Calculator
Build a race fueling plan: carbs per hour, gels to carry, fluid and sodium targets, and timing.
Open tool →Marathon Split Pacing Calculator
Mile-by-mile splits for your goal time on any of 100 marathon courses, with grade-adjusted pacing from each course’s real hills.
Open tool →Want a full plan, not just numbers?
Generate a free, personalized training plan for any distance in seconds.
Create your free plan