How do I calculate running pace?
Divide your total finish time by your race distance. A 2 hour half marathon is 120 minutes divided by 13.1 miles, which is about 9:10 per mile or 5:42 per kilometer.
Running pace calculator for every race goal
Convert finish time into pace per mile or pace per kilometer, project a finish time from your current pace, and build race splits for 5K, 10K, half marathon, and marathon training.
Pace calculator
Race distance
42.20 km
mi
Target finish time
hh : mm : ss
Target pace
Per mile
Race split calculator
Check whether your goal pace is realistic at the checkpoints runners actually care about.
| Checkpoint | Distance | Elapsed time |
|---|
Equivalent race times
These projections hold the same pace across each race distance.
Hold the pace on race day
Plan the pace here, then train it in Prymo
Prymo builds adaptive workouts around your goal, tracks live pace and splits, and helps you know when to push or back off before race day.
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How to use the running pace calculator
Choose a preset race distance or enter a custom distance. Use finish time to calculate the pace you need, or switch modes and enter pace to calculate your projected finish time.
- Use miles to calculate pace per mile for US races.
- Use kilometers to calculate pace per kilometer for metric training plans.
- Check the split table before race day so the goal has practical checkpoints.
- Save a little room for terrain, weather, aid stations, and crowded starts.
| Marathon goal | Pace /mi | Pace /km |
|---|---|---|
| 3:00:00 | 6:52 | 4:16 |
| 3:30:00 | 8:01 | 4:59 |
| 4:00:00 | 9:09 | 5:41 |
| 4:30:00 | 10:18 | 6:24 |
| 5:00:00 | 11:27 | 7:07 |
Running pace calculator FAQ
Quick answers for marathon pace, half marathon pace, and unit conversion.
What pace do I need for a 4 hour marathon?
A 4 hour marathon requires about 9:09 per mile or 5:41 per kilometer, assuming steady splits across the full 26.2 mile or 42.195 kilometer distance.
Can I use this as a marathon pace calculator?
Yes. Choose Marathon, enter your target finish time, and the calculator shows your pace, projected splits, speed, and equivalent race times.
Is pace per mile the same as pace per kilometer?
No. Pace per mile is the time it takes to run one mile. Pace per kilometer is the time it takes to run one kilometer. The calculator converts both from the same speed.
How do I convert pace per kilometer to pace per mile?
Multiply your pace per kilometer by 1.609. A 5:00 per kilometer pace is about 8:03 per mile. Switching the Miles and Km toggle does the conversion for you.
What pace do I need for a 2 hour half marathon?
A 2 hour half marathon needs about 9:09 per mile or 5:41 per kilometer across the full 13.1 mile or 21.0975 kilometer distance.
How do I turn running pace into speed?
Divide 60 by your pace in minutes. A 9:00 per mile pace is 6.67 mph, and a 6:00 per kilometer pace is 10 km/h. The calculator shows speed for whichever unit you pick.
What is a good running pace for a beginner?
Many new runners settle somewhere around 10:00 to 12:00 per mile, or 6:15 to 7:30 per kilometer. Finishing the run feeling steady matters more than the number, and your pace drops as your training builds.
What are negative splits?
Negative splits mean running the second half of a race faster than the first. Compare the split table against your goal pace to see how much time you would need to make up late in the race.
Can I use this as a walking pace calculator?
Yes. The maths is the same for any distance and time, so you can enter a walk, a hike, or a run-walk plan and get pace per mile, pace per kilometer, and splits.