Question: how long to walk 5k on treadmill?
Answer: If you want to finish a 5K in 45 minutes, set the treadmill at 4.1 mph, essentially a brisk walk. For 40 minutes, enter 4.7 mph; for 30 minutes, 6.2 mph. You can calculate the needed miles-per-hour setting on the treadmill for any time goal by dividing 3.1 miles by the minutes divided by 60.