How is running pace calculated?
Divide your finish time by the distance in kilometres. A 50-minute 10K is 5:00 min/km, or 12 km/h. Pace tells you how long each kilometre takes; speed tells you how far you travel in an hour.
Running pace calculator
Calculate your pace or finish time, choose a strategy, and check your splits.
Build your plan
Live calculationYour plan starts here.
Enter a valid distance and time or pace to see your results.
Your plan is ready
Average pace
5:13min/km
Finish time1:50:00
Average speed11.51 km/h
Total distance21.0975 km
Even split
±0%One steady pace, from the start to the finish.
- Start0:000 km
- Halfway0:55:0010.54875 km
- Finish1:50:0021.0975 km
First half5:13 min/km
0:55:00Steady
Second half5:13 min/km
0:55:00Steady
Pace by half. A shorter bar means a faster pace.
Compare strategies
Every strategy reaches the same target finish time.
| Pacing strategy | First half | Second half | Total |
|---|---|---|---|
| Even split | 5:13 min/km | 5:13 min/km | 1:50:00 |
| Negative split | 5:22 min/km | 5:03 min/km | 1:50:00 |
| Positive split | 5:03 min/km | 5:22 min/km | 1:50:00 |
Your race splits
Know when to arrive. Keep your goal in sight.
| Checkpoint | Segment | Segment pace | Segment time | Elapsed time |
|---|---|---|---|---|
| 5 km | 5 km | 5:13 min/km | 0:26:04 | 0:26:04 |
| 10 km | 5 km | 5:13 min/km | 0:26:04 | 0:52:08 |
| 15 km | 5 km | 5:13 min/km | 0:26:04 | 1:18:12 |
| 20 km | 5 km | 5:13 min/km | 0:26:04 | 1:44:17 |
| Finish · 21.0975 km | 1.0975 km | 5:13 min/km | 0:05:43 | 1:50:00 |
Times are calculated at full precision and rounded to the nearest second for display. A segment crossing halfway shows its average pace; displayed segment times may differ by a second when added.
How do I read my race plan?
Understand pace, strategies, and checkpoints.
What is a negative split?
You run the second half faster than the first. Here, first-half pace is 103% of average pace and second-half pace is 97%. Each half covers exactly half the distance, preserving your target finish time.
Why does pacing matter?
Starting at a pace you can sustain helps you manage effort over the race. Even pacing keeps it steady; a negative split saves a little speed for later. Choose a plan that fits your preparation and conditions.
How do I read my splits?
Elapsed time is the time since the start at each checkpoint. Segment time covers only the distance since the previous checkpoint. For a changing pace, a segment that crosses halfway includes both paces.
Example race plans: pace and splits
See how a finish-time goal translates into pace. Open an example to change the distance, time or strategy.
10K in 50 minutes
A 50-minute 10K requires an average pace of 5:00 min/km. With even pacing, reach 5 km in 25 minutes and finish at 50 minutes. Select this example, then adjust the time to your own goal.
- Average pace
- 5:00 min/km
- Finish time
- 0:50:00
| Checkpoint | Elapsed time |
|---|---|
| Halfway · 5 km | 0:25:00 |
| Finish · 10 km | 0:50:00 |
Half marathon under 2 hours
For the exact 21.0975 km distance, a 1:59:00 target requires about 5:38 min/km and gives a one-minute margin below two hours. The calculator keeps full precision; using the rounded displayed pace can produce a slightly different finish time.
- Average pace
- 5:38 min/km
- Finish time
- 1:59:00
| Checkpoint | Elapsed time |
|---|---|
| Halfway · 10.54875 km | 0:59:30 |
| Finish · 21.0975 km | 1:59:00 |
Negative split for a 50-minute 10K
Keep the same 50-minute goal while changing the distribution: run the first 5 km at 5:09 min/km (25:45) and the second at 4:51 min/km (24:15). This is the planner’s fixed 103% / 97% model, not a prediction of your fitness or a personalised coaching recommendation.
- Average pace
- 5:00 min/km
- Finish time
- 0:50:00
| Checkpoint | Elapsed time |
|---|---|
| Halfway · 5 km | 0:25:45 |
| Finish · 10 km | 0:50:00 |
Checkpoint times below are calculated from the unrounded pace. Allow for course conditions and your preparation when choosing a goal.