Is this Race Predictor – Running Time Calculator free to use?

Yes, Race Predictor – Running Time Calculator is 100% free to use online with no installation or account required.

How do I use the Race Predictor – Running Time Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

Race Predictor – Running Time Calculator — Free Online Tool

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Predict race times using Riegel formula

Note: T2 = T1 × (D2/D1)^1.06. Predict longer race from shorter race time.

Known Race

Known Distance (km)

Known Time (min)

Target Distance (km)

⚠️ For educational and training purposes only. Consult a coach, physician, or certified trainer before making training or health decisions.