⏱️ Race Time Predictor

Estimate race finish time from your recent running performance. No sign-up required.

Free Running toolInstant result

Use the Race Time Predictor

Enter your numbers below, then select Calculate / Generate. See results immediately without uploading personal information.

How race prediction works

This predictor uses the Riegel formula: predicted time = recent time × (target distance ÷ recent distance)^1.06. It is an estimate, not a guarantee.

Worked example

A recent 25-minute 5K can be used to estimate a 10K finish time, though endurance and course conditions matter.

Tips for better results

Double-check all input values before calculating.
Use the competition's official rules if they differ from the standard formula.
Use this tool for planning and learning; results do not replace official records.

More free running resources

Explore related tools to plan matches, understand performance and organize your next event.

Running Pace Calculator →

Worked example

A steady 5:00 min/km average pace suggests about 25 minutes for 5 km, but a prediction based on one race may differ for longer distances.

Before relying on the answer

Terrain, weather and endurance change race outcomes. Treat predictions as planning estimates.

This calculator uses the values entered in the form above. Use it as a transparent estimation and learning aid, not a substitute for the published rules of a league or sports governing body.

How to use the result

Confirm the measurement units and format, enter the numbers carefully, calculate and inspect the output. If the answer looks unusual, review the input values and compare it with the example above. For organized competitions, document any special rules before publishing final standings.

Frequently asked questions

Can I use the tool for an official competition?

Use it for preparation and cross-checking, but confirm the result independently against official competition rules.

Is my calculation live match data?

No. This page calculates from values that you type; it does not fetch live match statistics.

Do I need to register?

No. The supplied calculators do not require account registration.