Marathon in 4 Hours: Pace per KM and Mile
Calculate your running pace per km and per mile, finish time and km splits, or predict race times with the Riegel formula — right in your browser.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
This page opens the running pace calculator with a marathon (42.195 km) in 4:00:00 already filled in: the required pace is 5:41 per kilometer, which equals 9:09 per mile or about 10.5 km/h (6.6 mph).
The four-hour marathon is the signature amateur target — exactly the same pace as a two-hour half, held twice as long. The split table shows every kilometer up to 10 and then 5 km checkpoints: 1:25:19 at 15 km, 1:53:45 at 20 km, 2:50:38 at 30 km and 3:47:31 at 40 km.
Marathon pacing punishes optimism, so also test 4:15:00 and 4:30:00 to build a safety margin, or run your latest half-marathon result through the predictor mode before you commit to a goal pace.
Example. Five kilometers in 25:00 is a pace of 5:00 per kilometer and 8:03 per mile.
Limit. Race-time predictions use the Riegel exponent 1.06 on the built-in distances 5K, 10K, half marathon, and marathon.