Parkrun Predictor — Predict Your Parkrun Time
Predict your parkrun (5K) time from other race distances.
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
Marathon Time Predictor
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.