Enter Recent Result
Enter a recent race time to see your potential across other distances.
How does this calculator work?
This tool uses Riegel's Formula, a widely accepted method for predicting race performance. It assumes that a runner slows down at a specific rate as distance increases.
While accurate for many, your actual performance depends on training specificity. For example, a great 5K runner needs specific endurance training to hit their marathon prediction.
Ready to hit your goal?
Consistency is key to achieving these predicted times. Run and Grow helps you build that consistency by gamifying your training. Every run grows your virtual garden, keeping you motivated day in and day out.