Marathon, half marathon, 10-mile & 10k
Training run calculator

Marathon run time calculator - calculate target times for marathons, half-marathons, 10k, 10-mile and other races
This marathon run calculator will develop your pecs too!
Use this Training Run Calculator to help you prepare for your marathon, half-marathon, 10k or 10-mile race.

For any race distance and target time, it will tell you how fast you should be doing your training runs. For instance, say you want to run a marathon in 3 hrs, 30 minutes. How fast you should be doing a 10-mile training run?

Enter your race target time, click on the big button and voila! - the training run calculator says you should aim for 1 hour, 12 minutes and 39 seconds, or a split time of 7 minutes and 16 seconds per mile.

Note that the Training Run Calculator doesn't just extrapolate speeds - it adjusts for fatigue in quite a complicated way, based on chunks of data gleaned from various running magazines.

Also, check out my Marathon Run Calculator, which helps you calculate your marathon or other race targets based on your training runs.

Enter your race targets and training distance...      (just write over the default numbers)

Enter your race distance:

 miles (or enter km and click )

Enter your race target time:

hours minutes seconds

Enter your training run distance:

miles (or enter km and click )

And now...   


Training run:  

 miles at  mph or  kph

Training run time:

hours minutes  seconds

Split time:

 minutes and seconds per mile

Split time:

 minutes and seconds per kilometer

Have fun, and don't overtrain!