Why predict race times?
Setting a realistic marathon or half marathon goal is the first step of any training plan. A race predictor estimates what you could run at different distances based on a recent performance.
Riegel's formula
RunTrack uses Riegel's formula: T2 = T1 × (D2/D1)^1.06. From a 10K time you can estimate half marathon and marathon results. The exponent accounts for increasing fatigue over longer distances.
RunScore: your level in one number
The RunTrack Race Predictor also calculates RunScore: a 0–1000 rating of your athletic level with ranks you can share with friends.
Calculate your prediction
Save a run in RunTrack and open the Race Predictor for RunScore, rank and predicted times from 5K to marathon.