Race Day Planning
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.
Step 1 · Your Goal Finish Time
13.1 miles / 21.1 km
Race Pace Summary
Average Pace
8:01 / mile
4:59 per kilometer
Average Speed
7.5 mph
12.1 km/h
Projected Finish Times
5K24:53
10K49:46
Half Marathon1:45:00
Marathon3:30:00
Race Splits
Mile 18:01
Mile 216:01
Mile 324:02
Mile 432:02
Mile 540:03
Mile 648:03
Mile 756:04
Mile 81:04:05
Mile 91:12:05
Mile 101:20:06
Mile 111:28:06
Mile 121:36:07
Mile 131:44:07
Mile 141:52:08
Share & Embed
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.