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About this tool
Estimate your 10K finish time from a recent race with the Riegel formula, plus kilometre and mile target splits.
10K Race Time Predictor organises recent race results, training pace, target effort and course notes into a practical 10K prediction worksheet.
Open 10K Race Time Predictor on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Turns goal time into split and effort notes.
Lets you include recent runs and course difficulty.
Creates a simple race plan to review before the start.
No. Weather, course, sleep, fueling and fitness changes affect race results.
Yes, add recent run/walk data and choose a conservative target.
For injury, major training changes or competitive goals, personalised coaching is better.