Running Pace Calculator
Find the pace for your next race, check the average pace of a completed run, or work out how far you can go in a set time. Enter two values to calculate the third, then check your kilometer or mile splits. No sign-up needed.
Make your next run a plan.
Set your goal. Find your pace. Know every split.
Your run
Your running plan
Live resultRequired average pace
6:00 / km
5 km in 30:00
- Pace / mile
- 9:39 min/mi
- Speed
- 10.00 km/h
- Treadmill
- 6.21 mph
Race splits
Know when to reach each checkpoint.
| Checkpoint | Split time | Elapsed time |
|---|---|---|
| 1 km | 06:00 | 06:00 |
| 2 km | 06:00 | 12:00 |
| 3 km | 06:00 | 18:00 |
| 4 km | 06:00 | 24:00 |
| Finish5 km | 06:00 | 30:00 |
Elapsed time starts at 00:00. Split times add up to your displayed finish; a short final segment is included.
Pace precision & rounding
6:00.00 min/km · 9:39.36 min/mi
The headline is rounded; the plan uses the unrounded pace. 6:00/km gives 30:00; 6:01/km gives 30:05. A “finish under” goal includes only the buffer you choose.
Finish times at this pace
The same pace held over other distances. These are mathematical comparisons, not predictions of your race performance.
- 400 m
- 02:24
- 5K
- 30:00
- 10K
- 1:00:00
- Half marathon
- 2:06:35
- Marathon
- 4:13:10
Assumes a constant pace. Hills, fatigue, weather and stops are not modeled. Use elapsed time to include stops, or moving time to exclude them.
What pace do you need for your goal time?
A 30-minute 5K takes 6:00 per kilometer. A two-hour half marathon and a four-hour marathon both take about 5:41 per kilometer. Use these common targets as a starting point, then choose the matching race and time in the calculator.
| Race | Finish time | Pace / km | Pace / mile |
|---|---|---|---|
| 5K | 20:00 | 4:00.00 | 6:26.24 |
| 5K | 25:00 | 5:00.00 | 8:02.80 |
| 5K | 30:00 | 6:00.00 | 9:39.36 |
| 10K | 1:00:00 | 6:00.00 | 9:39.36 |
| Half marathon | 1:45:00 | 4:58.61 | 8:00.57 |
| Half marathon | 2:00:00 | 5:41.27 | 9:09.23 |
| Marathon | 4:00:00 | 5:41.27 | 9:09.23 |
These are exact finish-time targets. For a sub-20 5K, sub-2 half marathon or sub-4 marathon, choose Finish under this time and enter how many seconds ahead you want to finish.
Set up your run in three steps
Choose the result you need
Select Calculate pace when you know your distance and time. Use Calculate time for a known distance and pace, or Calculate distance for a known pace and duration. Switching modes carries your current plan into the next calculation.
Enter your distance, time or pace
Choose 5K, 10K, Half marathon or Marathon, or enter a custom distance in km, miles or meters. The race presets use 21.0975 km for a half marathon and 42.195 km for a marathon. Enter time in hours, minutes and seconds; enter pace as minutes and seconds per kilometer or mile.
Check the result and choose your checkpoints
Your running plan updates as you type. Choose splits every 1 km, 1 mile, 5 km or 400 m. Change the primary pace unit to match your watch, and use Copy plan link to keep or share the setup.
Turn your target into a race split plan
A target pace tells you how fast to run; the split table tells you when to reach each checkpoint. Choose the interval that matches your race markers or track laps.
Split time covers the segment ending at a checkpoint. Elapsed time is the total from the start. For a 30-minute 5K, the 3 km row shows a 6:00 split and 18:00 elapsed.
A two-hour half marathon or a sub-two finish?
An exact two-hour half marathon needs 5:41.27/km. Setting your watch to 5:41/km gives about 1:59:54; 5:42/km gives about 2:00:15. The same one-second change per kilometer can put you on the other side of your target.
Choose Finish under this time with a two-hour target and a 30-second buffer to plan for 1:59:30. Open Pace precision & rounding below the split table to see the more precise pace and neighboring whole-second settings. The table uses the unrounded pace throughout.
Read the final segment and keep your plan
The finish row includes any distance left after the last full checkpoint. A marathon with kilometer splits ends with a 0.195 km segment. Checkpoints are rounded to the nearest second; segment times are the differences between checkpoints, so they add up to the displayed finish.
Expand longer tables to see every checkpoint. Copy plan link saves your mode, inputs, units, goal buffer and split interval in a link that reopens the same setup. You can also take a screenshot of the expanded table.
Convert running pace between kilometers, miles and treadmill speed
To use this page as a pace converter, select Calculate time, enter your known pace and a distance such as 1 km. The result shows pace in both units, Speed in km/h and Treadmill in mph. Changing the pace unit also converts the pace you entered.
| Pace / km | Pace / mile | km/h | mph |
|---|---|---|---|
| 5:00 | 8:02.80 | 12.00 | 7.46 |
| 5:30 | 8:51.08 | 10.91 | 6.78 |
| 6:00 | 9:39.36 | 10.00 | 6.21 |
| 6:30 | 10:27.64 | 9.23 | 5.74 |
| 7:30 | 12:04.20 | 8.00 | 4.97 |
Read 5:30 as five minutes and thirty seconds. That is 5.5 decimal minutes, not 5.30. For a 30-minute 5K, the speed equivalent is 10 km/h or about 6.21 mph. A treadmill with 0.1 mph increments would need you to choose a nearby setting; this calculator shows the mathematical equivalent rather than selecting a machine setting.
How pace, time and distance fit together
Running pace measures time per unit of distance, so a smaller min/km or min/mi value means faster running. Keep the distance and pace units consistent when using these formulas.
- Pace = time ÷ distance. A 30-minute run over 5 km is 6:00/km.
- Time = pace × distance. At 6:00/km, 10 km takes 60 minutes.
- Distance = time ÷ pace. At 6:00/km, 45 minutes covers 7.5 km.
What the plan assumes
The split table assumes a constant average pace. Hills, weather, fatigue and changes of speed are not modeled. Use elapsed time to include stops in your average, or moving time to exclude stopped time.
Finish times at this pace extends that same pace to other distances. It answers how long the distance would take at that pace, not whether you can sustain it. Training pace zones, negative splits and separate run/walk intervals require different inputs and are outside this calculator.
Running pace questions
What pace do I need for a four-hour marathon?
For 42.195 km in exactly four hours, the average pace is about 5:41.27/km or 9:09.23/mile. Select Marathon and the 4:00:00 quick target. For a sub-four finish, select Finish under this time and add a buffer. A whole-second pace of 5:42/km would finish at about 4:00:31.
What treadmill speed is a 10-minute mile?
A 10:00/mile pace equals 6 mph, or about 9.66 km/h. Enter 10 minutes and 0 seconds per mile in Calculate time mode to see the corresponding speed. This is a unit conversion; it does not adjust for treadmill calibration, incline or outdoor conditions.
How do I calculate average pace with stops or walk breaks?
Divide the total time you want to include by the full distance. If a 5 km outing takes 30 minutes including a two-minute stop, elapsed pace is 6:00/km. Using only the 28 minutes of moving time gives 5:36/km. Walking can be included in the total, but this tool does not assign separate running and walking paces.
Can I average the paces from several parts of a run?
Add the segment times and distances first, then divide total time by total distance. For example, 2 km in 10 minutes plus 3 km in 18 minutes gives 28 minutes over 5 km, or 5:36/km. Simply averaging 5:00/km and 6:00/km would give 5:30/km and ignore the different segment distances.
Why can even-pace splits differ by one second?
The exact time for a segment may contain fractional seconds. The calculator rounds cumulative checkpoints to the nearest second, then finds each segment time by subtraction. That can produce alternating whole-second splits while keeping the finish time consistent.
Will my shared plan keep its units and settings?
Yes. Copy plan link includes your calculation mode, inputs, distance and pace units, finish goal, buffer and split interval. A shared link takes priority over saved unit preferences. Without a shared link, this browser can remember your unit choices when local storage is available. Reset returns to the 30-minute 5K example and clears those preferences.
Make your own race split plan
Choose a distance and target time, check your pace, and copy a link to your plan.
Free to use. No sign-up.