Race Prediction Calculator


Use this race prediction calculator to set realistic running goals. As with any prediction tool, it is not an exact science but it should give you a good idea for the approximate time to aim for.

There are many race prediction formulas out there, but please do not limit or over-extend your capabilities based on this. You'll often see a predict-your-time 5k race prior to many marathons, as this has proven to be a reliable indicator for many distance runners.

If you haven't run any of the three race distances listed under 'Base Distances', go to the track and do a self time-trial. Remember that one lap around the track is 400 meters. I find that tools like this come in handy when attempting to set race pace goals. For example, I’ve often had my sights on breaking a 3-hour marathon and know that I’ve lacked the speed to do this. By playing with the calculator a bit, I’ve deduced that I’ll need to break 38 minutes in a 10k (or break 18 minutes in a 5k) to be at the desired fitness level to break 3 hours in a marathon. Bottom line: The calculator helps me set realistic race goals.

Goals that are too easy or too hard can deflate our ego and detract from our momentum. So now that you have a realistic target, set your goal and pursue it to the best of your ability.

Using the Race Prediction Calculator:

  1. Enter a Base Distance (1.5k, 5k, or 10k) that you’ve recently run.
  2. Enter your time in the 3 fields (hours, minutes, and seconds. Note: You’ll need to enter something in each field, so enter a zero if applicable.
  3. Hit the Calculate button to see predicted times for other distances.
  4. Perform follow-on iterations to “bridge” gaps from short-distance to long-distance races. For example, to see what 5k time I’d need for a sub-3 marathon I see what 10k time equates to sub-3 and look up the 5k time associated with it.

 
Base distance:  

 

Enter Time
hours  
minutes  
seconds
 
 
   

 
Estimated Results
Marathon
10,000 meters
5000 meters
3000 meters
1500 meters
800 meters
400 meters

 

* only a moderate accuracy
** cannot predict accurately


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