1. Enter distance
Choose 5K, 10K, half marathon, marathon, or type a custom distance.
Pace, speed, splits, and race projections
Free Running Pace Calculator
A running pace calculator converts distance and finish time into average pace per mile and kilometer. Use it to check speed, cumulative splits, and even-pace projections for popular race distances.
Race pace inputs
Enter distance and time
Choose a race preset or enter any completed distance and finish time.
Finish-time projections assume the same even pace. Hills, weather, stops, fatigue, and fitness changes can make real results different.
Your running pace
Pace per kilometer
5:00
Pace per mile
8:03
Speed
12.00 km/h
Speed
7.46 mph
Finish-time projections
5K
25:00
10K
50:00
Half marathon
1:45:29
Marathon
3:30:59
Cumulative splits (10)
1 km
5:00
2 km
10:00
3 km
15:00
4 km
20:00
5 km
25:00
6 km
30:00
7 km
35:00
8 km
40:00
9 km
45:00
10 km
50:00
Based on 10 km in 50:00 at an even pace.
How to use your pace result
2. Add elapsed time
Use your real finish time or a target time to calculate the matching even pace.
3. Review splits
Use cumulative splits as checkpoints, then adjust your plan for course and conditions.
Pace projections are a planning baseline
The calculator scales one average pace across every distance. It does not predict how endurance changes over a longer race and cannot account for elevation, surface, wind, heat, aid-station stops, congestion, or fatigue. Use the result as a clear starting point, not a promise of performance.
Running pace calculator FAQ
What is a running pace calculator?
A running pace calculator divides finish time by distance to show average time per mile and kilometer. It can also project finish times and cumulative splits at that same pace.
How do I calculate pace per mile or kilometer?
Enter the distance you ran and the total hours, minutes, and seconds. The calculator converts the distance as needed and reports both minutes per mile and minutes per kilometer.
What pace do I need for a 5K, 10K, or marathon?
Enter the race distance and your target finish time. The pace results show the even per-mile and per-kilometer pace needed to reach that target.
Are projected race times accurate?
They are mathematical projections at a constant pace, not performance predictions. Terrain, weather, stops, fatigue, training, and race distance can all change an actual finish time.
Why are my GPS watch pace and calculator pace different?
GPS distance, auto-pause settings, moving time, course measurement, and rounding can create small differences. Use official race distance and elapsed time for the cleanest comparison.
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