Free Tool
Magic Mile Calculator | Race Prediction
Magic Mile Calculator - Jeff Galloway Magic Mile: Mile time x multiplier predicts race times
Built by an engineer who chases finish lines and is obsessed with data. Thomas Prommer — technology executive who has worked with Google, Apple, Nike, Adidas, Netflix and other global brands. Also an Ironman finisher, HYROX Pro Division competitor, and marathon runner. These tools combine engineering rigor with real race experience.
Magic Mile Calculator
Jeff Galloway Magic Mile: Mile time x multiplier predicts race times.
Methodology
Jeff Galloway Magic Mile: Mile time x multiplier predicts race times. 5K: x1.15, 10K: x1.06, Half: x1.21, Marathon: x1.30.
FAQ
How does this work?
Jeff Galloway Magic Mile: Mile time x multiplier predicts race times. 5K: x1.15, 10K: x1.06, Half: x1.21, Marathon: x1.30.
How accurate?
Predictions improve with similar race distances and recent performances.
What affects accuracy?
Training, weather, terrain, race day nutrition, and tapering all affect actual performance.
Should I use this for goal setting?
Yes, use as a starting point. Adjust based on training and conditions.
Predictions based on mathematical models. Actual performance varies.