Running & Track Tools
Staggers, race predictions and mileage ramps — where the exact arithmetic keeps disagreeing with the rule of thumb.
Track Lane Stagger Calculator
The head start each lane needs — 2 pi times the lane width, and completely independent of how big the track is.
Race Time PredictorRiegel race-time prediction across distances — doubling the distance costs only 4.2% per km, and the exponent is a fitted number.
Weekly Mileage Ramp CalculatorWhat the ten percent rule actually does when you follow it — it doubles the mileage in seven weeks and multiplies it by 142 in a year.