How to use this pace calculator
- Distance, type the distance you ran and pick the unit (kilometres or miles), or tap a preset like 5K or Marathon to fill it for you.
- Time, enter your finish time using the hours, minutes and seconds boxes.
- Read your pace and average speed, they update instantly as you type.
Nothing is submitted or stored: the numbers never leave your device, so you can plan your training runs and race targets privately.
How pace is calculated
Pace is simply time divided by distance. The formula is pace = total time ÷ distance. This calculator turns your hours, minutes and seconds into a total number of seconds, then divides that by the distance to get the time it takes you to cover one kilometre and one mile. The result is shown in minutes and seconds per unit (mm:ss), which is how runners usually talk about pace. Average speed is the other side of the same coin: speed = distance ÷ time, expressed in kilometres per hour and miles per hour.
Common race distances
- 5K: 5 kilometres (3.11 miles)
- 10K: 10 kilometres (6.21 miles)
- Half marathon: 21.1 kilometres (13.11 miles)
- Marathon: 42.2 kilometres (26.22 miles)
These are the four distances most race calendars are built around. Use the preset buttons above to drop the exact distance into the calculator, then enter your goal or recent finish time to see the pace you would need to hold. Knowing your target pace per kilometre or per mile makes it far easier to settle into a steady rhythm on race day instead of starting too fast and fading.
Using pace to plan your training
Most training plans are written around pace rather than raw time, because pace stays meaningful no matter how long the run is. Once you know the pace you can sustain for a 5K, you can work out sensible paces for easy runs, tempo efforts and long runs. A common approach is to keep easy runs around 60 to 90 seconds per kilometre slower than your 5K pace, which keeps the effort comfortable while still building fitness. Plugging different times into this calculator is a quick way to test those targets before you head out the door.
Frequently asked questions
How is running pace calculated?
Pace is your total time divided by the distance you covered. This tool converts your hours, minutes and seconds into total seconds, then divides by the distance to give a pace per kilometre and per mile, shown as mm:ss.
What is a good running pace?
It depends on your fitness and goal. Many recreational runners cover a kilometre in 6 to 7 minutes (about 10 to 11 minutes per mile), while trained runners go much faster. The best pace is one you can sustain comfortably for your target distance.
How do I convert pace per mile to pace per kilometre?
Multiply your pace per mile by 0.6214 to get pace per kilometre, or divide pace per kilometre by 0.6214 to get pace per mile. One mile is 1.60934 kilometres, so the per-mile pace is always the larger number.
What pace do I need to finish a marathon in 4 hours?
A marathon is 42.2 km (26.2 miles). Four hours is 240 minutes, so you need roughly 5:41 per kilometre or about 9:09 per mile. Enter 42.2 km and 4 hours above to confirm the exact pace.
Is my data uploaded?
No, everything is calculated on your device and nothing is sent anywhere.