Solve for pace, time or distance and get split times for common race distances.
Pace, time and distance form a simple triangle of relationships — knowing any two gives you the third. This calculator solves all three directions and extends the result to a split table for common race distances. The split table lets runners verify even-pacing strategy or set milestone targets for marathon training.
Pace
Pace = Total Time ÷ Distance
Finish time
Finish Time = Pace × Distance
Distance
Distance = Total Time ÷ Pace
Pace calculations are mathematical and assume constant effort throughout the distance. Real-world performance varies with terrain, weather, fatigue and pacing strategy. Use finish time predictions as a guide, not a guarantee.
Pace is the time taken to cover one unit of distance (typically one kilometre or one mile). A pace of 5:00 /km means you cover one kilometre every five minutes. It's the inverse of speed — faster running = lower pace number.
You need a pace of 5:41 /km (9:09 /mile). Input a 42.195 km distance with a target time of 3:59:59. The calculator will show the required pace and confirm whether it's achievable based on your current training paces.
Use whichever matches your GPS watch and race. Most road races outside the US use kilometres. The calculator always shows both pace formats — you can use one as a cross-check regardless of which unit you entered.