Parkrun Predictor — Predict Your Parkrun Time
Predict your parkrun (5K) time from other race distances.
Distance measurement
Time in hours
Time in minutes
Time in seconds
How We Calculate This
Parkrun Prediction
Uses the Riegel formula: T2 = T1 × (5 / D1)^1.06
Parkrun is always 5 km. Enter a recent race result from any distance and the calculator predicts your parkrun time.
Frequently Asked Questions
Related Calculators
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Predict your marathon time from a shorter race result.
Half Marathon Predictor
Predict your half marathon time from 5K or 10K results.
10K Predictor
Predict your 10K time from a 5K or parkrun result.
5K Predictor
Predict your 5K time from shorter or longer race results.
Ultra Predictor
Predict ultra marathon times for 50K, 50mi, 100K and 100mi.
Last updated: February 2026
All calculations are estimates. Always consult a coach or medical professional for personalised training advice.