Race Time Predictor

An easy to use calculator to predict a race finish time based on a previously completed race.

Digital clock

This calculator will help you to predict your race time based on a previously completed race. It is based on the formula created by Peter Riegel.

T2 = T1 × (D2 / D1)1.06

D1 is the previously completed distance and T1 is the finish time for this race. D2 is the target distance and T2 is the predicted time.

Input Data

Completed race: 5 km
10 km
half marathon
marathon
Finish time: hours:
minutes:
seconds:
Target race: 5 km
10 km
half marathon
marathon

Results

Predicted time: hours:
minutes:
seconds: