# Home

Did you ever want to convert mile pace to km pace? Or calculate your mile or kilometer pace for yasso's? Or perhaps calculate percentages of pace? You've come to the right place! Here you can perform all kinds of running calculations here.

New features and calculators are announced and explained in the blog, so be sure to check it out.

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# Mile-Kilometer Pace calculator

Do you ever read about mile pace wanting to know the corresponding kilometer pace, or the other way around? You can use this page to convert pace.

For instance, 'From mile to km pace'

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# Pace percentage

Do you ever want to run at a percentage of your goal or race pace, such as running at 80% of 5 minutes per kilometer or mile? You can use this page to calculate the percentage of a pace.

For instance, 80% of 5:00 per km/m

Choose calculation or leave at 'division'.

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# Yasso calculator

A **yasso** (see Runner's World) is a 800m run which you run in the time of your marathon, in terms of minutes and seconds. For instance, a runner aiming at a marathon in 3 hours and 30 minutes should run a yasso in 3 minutes and 30 seconds. While you can clock these times, I find it handy to use kilometer or mile pace, which spans 1000 or 1609 meters. You can calculate this yasso pace here.

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# VO2max estimator

VO2max is the maximum rate of oxygen consumption measured during incremental exercise. It is a general measurement of fitness. You can estimate it here. See the reference tables at machars.net to interpret your own VO2max value. A lab test is the most reliable way of measuring your VO2max, but it is expensive. This calculator uses Jack Daniels's formula.

For instance, 10 Kilometers

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# Training paces

This training paces calculator is based on percentages, using the multiplication method (see Pace percentage). Please use the numbers as indications, not as scientifically informed predictions. (So do what feels good, not what a calculator tells you!)

For instance, 10 Kilometers. Choose calculation or leave at 'Division'.

Pace | Percentage | |
---|---|---|

Long run pace | 06:40-07:42 | 65%-75% |

Easy run pace | 06:40-06:15 | 75%-85% |

Tempo run pace | 05:16-05:00 | 95%-100% |

Yasso pace (per km/mile) | 04:38 | 108% |

VO2max pace | 04:33 | 110% |

Speed form pace | 04:21 | 115% |

# Race predictors

### Riegel's prediction

This prediction calculator is based on Peter Riegel's (1977) article for Runner's World. He proposed a formula for comparing relative performances at different distances: predicted time = given time * (new distance/original distance)^{1.06}.

For instance, 10 Kilometers

For instance, Marathon distance

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# About

My name is Alex Reuneker. I'm a PhD candidate in Linguistics at Leiden University (The Netherlands) and an amateur long-distance runner. My PB on the marathon is 2:58:43 (Rotterdam 2018). You can find me on Strava.

I made this website because I wanted an easy way to calculate percentages of paces, convert mile-pace to km-pace (and vice versa) and do some other calculations, such as figuring out the km-pace for Yasso's. I figured that other runners may as well like an easy way to calculate stuff related to their training and goal times. Happy running!

# Time and distance to pace

Here, you can calculate pace based on a total time and distance, either in mile or kilometer pace.

For instance, 10 kilometer.

For instance, 100 meters.

Choose kilometers or miles.

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# Correct pace and time

Sometimes, you run a race and the race turns out to be either too short, or too long. What to do? First, just accept it. No measurement is perfect, and believe me, your GPS watch isn't either. Second, if you want to know what your corrected time and pace were, just fill in what you know on this page.