Calculate pace, finish time, or distance for any run. Includes race time predictions and per-mile/km splits.
Running the second half of a race faster than the first is called a negative split. Most race records are set this way. It requires discipline early on — starting conservatively allows you to finish strong when others fade.
5K = 3.107 mi · 10K = 6.214 mi · Half Marathon = 13.109 mi · Marathon = 26.219 mi. Use the race time predictor in the results to see your projected finish times across all distances at your current pace.