Running Race Time Predictor (Riegel Formula)
Predict your 5K, 10K, Half Marathon, and Full Marathon finish times and split paces from any recent benchmark race time using Peter Riegel’s endurance formula.
Recent Benchmark Race
h
m
s
Example: 0h 22m 30s for a 5K race.
Target Race & Fatigue Profile
Predicted Finish Time
TARGET: 10K
46:55
Predicted from 22:30 5K benchmark using Riegel exponent 1.06
Target Pace / km
4:41 / km
12.8 km/h average speed
Target Pace / mile
7:33 / mi
7.9 mph average speed
Predicted Multi-Distance Equivalents
5K Equivalent:
22:30 (4:30/km)
10K Equivalent:
46:55 (4:41/km)
Half Marathon Equivalent:
1:44:03 (4:56/km)
Marathon Equivalent:
3:36:58 (5:09/km)