No matter your age, sex, size or skill level, this calculator can estimate how fast you’d run 26.2 miles based on your training regimen and your performance in just one recent race (or two, if you want a more fine-tuned assessment). Have a marathon coming up? Your predicted time can help you pace yourself so you don't bonk. Read more »

Training regimen How many miles are you typically running per week while training for your marathon? 100 miles Race 1 Describe your longest recent race 1 Race distance 5K 5 miles 10K 10 miles Half marathon 2 Race difficulty Fast (cool, calm or flat) Average Hard (hilly, hot or windy) Note: Races completed under extremely challenging or easy conditions are not very good for predicting marathon times. 3 What was your time? 10 hrs 59 min 59 sec