Running Calculators

When predicting marathon performance based on times from shorter races, be aware that some calculators will predict an overly optimistic finish time for most runners:

• Distance/Time (McMillan)
• Distance/Time (Runworks)
• Distance/Time (RunningAHEAD)
• VDOT - Distance/Time (Attackpoint)
• VO2 Max & Purdy Points - Distance/Time (Run-Down)

I did a survey of runners on the old Runners World Online forum to find out which running calculators gave them the most accurate predictions.  The results were all over the place and it became obvious to me that what was needed is a calculator that can take into account the individual endurance level of runners when making predictions.

As a result, I created the following calculator which uses an adjustable version of the Riegel formula. When using a single predictor race you manually select your estimated endurance level, but if you put in two different predictor races it will estimate your endurance level for you (the two races should be different distances).  Download spreadsheet:

• Race Time Estimator with Adjustable "Aggressiveness" - (Greg Maclin)

Heart Rate (Download Spreadsheet):

• Training and Racing Heart Rate Zones - Download (Greg Maclin)

Input two of three variables (Distance/Time/Pace) - calculate the third:

• Distance/Time/Pace (Marathon Guide)

Run/Walk Calculators:

• Gallowalking Pace Calculator (Coach Dino)
• Gallowalking Pace Calculator (Scott Glazer)
• Run Walk Pace Calculator - Spreadsheet Download (Joe Ely)

Track Calculator (Calculates distances, lap splits, pace, etc.):

• Lap Split Calculator (Calculate lap times or splits for various distances)

Calculate Road Grade Based on Distance and Altitude Gain or Loss:

• Road Grade Calculator (CSGNetwork)
• Road Grade Calculator (Tom Fangrow)

Nutrition Calculator:

• Runner's Nutritional Calculator (Active.com)
• Fluid and Carbohydrate Calculator (ELOAD)

WMA Age Grading (See how you rank):

• WMA Age-Grading (EML Sports - 2023 Factors)
• WMA Age-Grading (Howard Grubb - 2020 Factors)
• WMA Age-Grading (Howard Grubb - 2015 Factors)
• More Info About Age Graded Scoring

WMA Notes:
100% = Approximate World Record Performance
90%+ = World Class Performance
80%+ = National Class Performance
70%+ = Regional Class Performance
60%+ = Local Class Performance