Race Percentile Calculator
Find out how your race time compares to other runners.
Distance measurement
Enter the gender
Time in hours
Time in minutes
Time in seconds
Your age in years
How We Calculate This
Percentile Estimation
Finish times for large races approximate a normal distribution. The calculator:
- Calculates a z-score from your time relative to the average and standard deviation
- Converts the z-score to a percentile using the cumulative normal distribution
- Applies an age-grading factor to estimate age-adjusted performance
Average times are derived from aggregate data of major races including parkrun, London Marathon and similar events.
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.
Parkrun Predictor
Predict your parkrun time from other race distances.
Last updated: 2026-03-03
All calculations are estimates. Always consult a coach or medical professional for personalised training advice.