Running Writings

Apps for training and racing

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Pace percent calculator Calculate percentages of race pace for Renato Canova-style workouts
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Race pace calculator Calculate pace and goal times for any track, XC, or road distance
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GAP calculator Grade-adjusted paces for uphill and downhill running
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Wind calculator Calculate wind-adjusted pace for headwinds and tailwinds
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Track wind calculator Calculate effects of wind during track workouts and track races
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Heat-adjusted pace calculator Calculate the effects of heat and humidity on your workouts and races
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CV/Threshold/VO2max Calculate threshold pace, CV pace, and VO2max pace from a single race performance
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Critical speed calculator Calculate critical speed from multiple race performances
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Power law calculator Predict race times at any distance from multiple race performances
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LT1 / Zone 2 calculator Calculate your LT1 pace and easy/Zone 2 pace from your 5k time
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Main site My articles on training, racing, injuries, and more

Aboutarrow_upward

This site hosts the web apps and scientific calculators that I have developed for Running Writings and my book, Marathon Excellence for Everyone

I'm both a coach and a human performance researcher, so I'm very excited about using science and technology to help runners stay healthy and run faster. These apps are meant to be useful for where the "rubber hits the road" - applying science and reasoned training principles to day-to-day training, racing, and workouts.

Be sure to check out the main site for the rest of my research and in-depth articles on training, racing, injuries, and more.

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Want to know when I've got a new app or a new article out? Sign up for my email list below and you'll be the first to find out!

Contactarrow_upward

If you've got feedback on this web app, or if you've found a bug, please reach out! You can reach me at john@runningwritings.com.

I'm also on Instagram and occasionally X/Twitter as well, but by far the best way to follow my all of my work is by joining my free email list!

If you want to learn much more about taking a scientific approach to your training, check out my new book Marathon Excellence for Everyone: it's an in-depth guide to the modern approach to marathon training