Pre-filled with race data: Marathon
Marathon Pace Calculator
Translate your goal finish time into actionable mile and kilometer splits. Lock in the pace you need for race day and embed the calculator on your training site.
26.2 miles / 42.2 km
Average Pace
4:00 / mile
2:29 per kilometer
Average Speed
15.0 mph
24.1 km/h
Projected Finish Times
Race Splits
Help more runners find a smart pace plan. Share the calculator or embed it on your site.
<iframe src="https://www.42cal.com/tools/pace-calculator?embed=true" title="Pace Calculator by 42Cal" width="100%" height="560" style="border:1px solid #e5e7eb;border-radius:12px;"></iframe>
Embed tip: set height="560" or adjust to fit your layout. This widget is responsive down to 320px.
How runners use this tool
- Lock in goal splits for your next marathon or half marathon.
- Embed the calculator on your coaching site or blog to help athletes plan.
- Dial in training paces that match your target finish time.
How to Use This Calculator
Enter your target finish time for any standard race distance and the calculator instantly converts it into per-mile and per-kilometer pace splits. You can also enter a custom distance if you are running an ultra or a non-standard event. The split table shows cumulative times at each mile marker so you can build a pacing band or program your watch with target splits. Results can be shared via link or copied as text for your training log.
How Pace Is Calculated
Pace is simply your total finish time divided by the race distance. For a marathon (26.2188 miles), a 4:00:00 finish means 240 minutes / 26.2188 = 9:09 per mile. The calculator also converts to metric pace (minutes per kilometer) by dividing total time by the distance in kilometers. Projected finish times for other distances use a linear extrapolation of your pace, which works well for even-split strategies but does not account for the physiological cost of longer distances. For distance-adjusted predictions, use the Race Time Predictor which applies the Riegel formula.
Frequently Asked Questions
Related Tools
- Race Time Predictor — Predict finish times across distances using the Riegel formula
- Training Pace Zones — Calculate your VDOT and five training zones from a recent race
- Difficulty Analyzer — Score course difficulty and estimate pace adjustments
- Fuel Planner — Plan race-day nutrition based on your target time
Take your training further
Track runs, follow a plan, and prepare for race day with MarathonOS for iOS.
Scan to download