This form tells you what running times you should expect on different distances if you were to train specifically for those distances. The assumption is that your speed as a fraction of the world record is a constant that is the same for every distance.

Distance you ran:

Time you took: h m s

Gender:

Units:

Your speed as a fraction of the ** world record: **

Equivalent performances:

Distance | Time | Pace | Speed |
---|---|---|---|

A simple formula to predict performance is t_{2} = t_{1} × (d_{2} / d_{1})^{b} where b can depend on the distance or other factors. Peter Riegel proposed using the constant b=1.06. The graph below derives b experimentally based on world records. The peak between 400m and 800m is explained by the transition from sprint to middle-distance which requires the runner to tap from a different energy source. Smaller features in the graph might be noise that could be smoothed out. It's also not clear if the curve obtained from world records applies to amateurs without any change. Nevertheless, the method is reasonable and easy to understand.

Comparing multiple formulas:

Using the VO_{2} max formula:

- Runwords: Running Calculator (also training paces, altitude and temperature effects)
- Jack Daniels' VDOT Running Calculator (also training paces, altitude and temperature effects)

Using Riegel's formula t_{2} = t_{1} × (d_{2} / d_{1})^{1.06}:

- Runner's World: Race Times Predictor
- HillRunner.com: Race Conversion
- Walk Jog Run: Marathon Pace Calculator

Using world records (like me):

Others:

- Faster Running: Craig's Running Calculator (also training paces)
- McMillan running calculator
- MarathonGuide.com: Race Results Predictor
- Alp Fitness: Equivalent Running Performances Calculator
- Merv's Running Calculator

Page created: June 11, 2016

Page last updated: December 22, 2016