Predict race times based on a recent result.
Real-time clinical computation active
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This assessment provides statistical probability and mathematical interpretation based on validated clinical equations. It is not a diagnostic tool.
Uses the Riegel Formula to predict your potential race times for distances ranging from a 5k to a full Marathon. This tool assumes you have done the appropriate endurance training for the target distance.
Developed by Peter Riegel in 1977, this formula has remained the gold standard for race prediction because it accurately captures the fatigue curves of human endurance.
If you are using a 5k to predict a Marathon, add 5% to the predicted time unless you have been running 60+ km per week.