How long does it take a professional runner to run a 100k (100km)?
Answer: on average it takes a professional runner 4 hours 52 minutes and 40 seconds to run a 100k (100km).
This assumes an average running speed of 2.93 minutes per kilometer which is the typical running pace for a professional runner over a 100k (100km).
Running Time Calculator
Calculate how long it will take to run a specific distance
Running Time Calculator
Calculate how long it will take to run a specific distance