Running Pace Calculator
Pace is simply total time divided by distance. Enter how far you ran and how long it took, and this calculator gives your pace per kilometre and per mile, your average speed, and what the same pace would produce over the standard race distances.
- Accurate
- Real-time
- Easy to use
- 100% free
Pace per kilometre
5:00
Speed
12.00 km/h
Details
Updates as you typeEnter the finishing time as hours, minutes and seconds.
Summary
Pace
5:00
- Pace per mile
- 8:03
- Speed
- 12.00 km/h
- Speed
- 7.46 mph
- 5K finish
- 25:00
- 10K finish
- 50:00
- Half marathon finish
- 1:45:29
- Marathon finish
- 3:30:59
- Race predictions here hold your current pace constant over the longer distance. Real finishing times drift slower as distance grows — Riegel’s formula (time × ratio^1.06) is the usual correction for that fade.
How this is calculated
- Total time
- 25:00
- Distance
- 5.000 km
- Distance
- 3.107 mi
- Pace = time ÷ distance
- 5:00
- Seconds per kilometre
- 300.0 s
- Speed = 3600 ÷ seconds per km
- 12.00 km/h
Distance
Compare scenarios
See how one change moves the result
- CurrentYour inputs as they stand5:00Current
- Distancekm 6.254:00
- Minutesmin 316:12
For informational purposes only. This is not medical advice — consult a healthcare professional about your health.
Frequently asked questions
How do I calculate running pace by hand?
Convert your finishing time entirely into seconds, then divide by the distance. A 25-minute 5K is 1500 seconds over 5 km, which is 300 seconds — five minutes — per kilometre. Divide seconds by 60 to get the minutes-and-seconds form.
How do I convert pace per kilometre to pace per mile?
Multiply your per-kilometre pace by 1.609344, because a mile is that many kilometres long. A 5:00/km pace becomes about 8:03 per mile. To go the other way, divide the per-mile pace by 1.609344 instead.
Are the predicted race times realistic?
They assume you hold exactly the same pace over the longer distance, which is optimistic. Most runners slow as distance grows, so a common correction is Riegel’s formula: multiply your time by the distance ratio raised to the power 1.06.
What is a good pace for a beginner runner?
Comfortable easy running for most new runners lands somewhere between 6:30 and 8:30 per kilometre, roughly 10:30 to 13:40 per mile. Pace matters far less than being able to hold a conversation while you run, which is the honest measure of easy effort.
Should most of my training be at race pace?
No. Endurance programmes typically put roughly 80% of weekly volume at an easy, conversational pace and reserve the remaining 20% for tempo work, intervals and races. Running every session hard mainly accumulates fatigue rather than fitness.