Improve Your Running With a Personalized Plan
Work with CM Performance Coaching for a custom training plan built around your goals, schedule, and experience level.
Get Your Custom Plan →
Enter your goal time and race distance to get even mile and kilometer splits for race day.
Improve Your Running With a Personalized Plan
Work with CM Performance Coaching for a custom training plan built around your goals, schedule, and experience level.
Get Your Custom Plan →Good race pacing starts with a plan. Use this split calculator to lock in your target mile and kilometer splits before race day. Pair it with the Race Time Predictor to set a realistic goal time, or check the Marathon Pace Chart for a full 26.2-mile reference table.
Even splits means running each segment of a race at the same pace from start to finish. If your goal marathon time is 4:00:00, an even-split strategy means running every mile in approximately 9:09. This is widely considered the most reliable pacing strategy for distance running — it avoids the common mistake of going out too fast and fading hard in the second half.
The alternative is a negative split, where you run the second half slightly faster than the first. Many experienced runners aim for a 1–3% negative split in marathons and half marathons. But for most runners — especially those new to racing — even splits are the safer, smarter starting point.
Going out too fast (a "positive split") is the number one cause of race blow-ups. Adrenaline, fresh legs, and the energy of race day make it easy to run the first mile 30 seconds faster than planned. Use this calculator to memorize your target split, and hold back in those early miles.
Select your race distance (or enter a custom distance) and type in your goal finish time. Hit Generate Splits and you'll see your average pace per mile and per km, plus a complete split table for every mile and kilometer segment of the race.
Fractional final segments are shown separately (e.g., the last 0.1 mile of a 5K or the final 0.2188 miles of a marathon). The split time for the final segment is calculated proportionally — so everything adds up to your exact goal time.
Print or screenshot the splits table to carry on race day, or program the splits into your GPS watch as custom pace targets.