Calculate pace, finish time, or distance for any run.
Running pace is your time per unit of distance, typically expressed as minutes per mile or minutes per kilometer. To find your pace, divide your total running time by the distance covered. To find your finish time, multiply your pace by the race distance.
5K = 3.1 miles (a popular beginner race distance). 10K = 6.2 miles. Half Marathon = 13.1 miles. Marathon = 26.2 miles. Ultra Marathon = anything beyond 26.2 miles, commonly 50K, 50 miles, or 100 miles.
Beginner runners typically run a 10-12 minute/mile pace. Intermediate runners average 8-10 min/mile. Advanced recreational runners hit 7-8 min/mile. Competitive runners run 6-7 min/mile. Elite marathoners maintain sub-5 min/mile pace for the full 26.2 miles. The world marathon record pace is approximately 4:34/mile.
Most runners slow down naturally over longer distances. A common rule of thumb: for each doubling of race distance, expect your pace to be 6-8% slower per mile. If you run a 5K at 8:00/mile, your half marathon pace might be closer to 8:50-9:00/mile. Starting too fast is the most common mistake in distance running; negative splits (running the second half faster) produce better overall times.