Name: Breno Melo Endurance Coaching
Address: 1330 Boylston Street, Unit 1208, Boston, MA, 02215, US
Telephone: +1 617-955-8861
Price range: $250–$750

Race Time Predictor

Convert one race result into equivalent times at every other distance.

Recent raceFinish time (h:mm:ss)

Equivalent race times predicted with the Riegel formula
Distance	Time	Pace /mi
5K	21:42	6:59
10K	45:00	7:14
Half Marathon	1:39:44	7:36
Marathon	3:27:15	7:54

Riegel projection (T₂ = T₁ × (D₂/D₁)^1.06). It assumes endurance training that supports the longer distance; an untrained marathon from a 5K time will run slower than this.

Race Time Predictor by Breno Melo Endurance Coaching. Open the full version for the methodology, the sources and the pace charts.