Use the calculator in five steps
The calculator works with a known distance and an elapsed time. You do not need an account, and you can enter kilometres or miles.
Open the Pace Calculator
Select Running Pace Calculator from the Calculators library, or use the blue button above.
Choose your distance
Enter the length of your run in the distance field and selectKilometres or Miles. Alternatively, use a preset for 5K, 10K, half marathon, or marathon. The presets set the distance unit to kilometres.
Enter your finishing time
Fill in hours, minutes, and seconds. For a 25-minute run, use 0 hours, 25 minutes, and 0 seconds. Enter a value in all three fields, even when one of the values is zero.
Calculate your pace
Select Calculate Running Pace. The results will appear below the input form.
Read and compare your results
Review average pace in min/km and min/mile, average speed in km/h and mph, and converted distances. Change the inputs and calculate again whenever you want a new result.
Example: 5 kilometres in 25 minutes
Suppose you completed a 5K run in 25 minutes. You would enter the following information into the calculator:
After selecting the calculation button, you should see:
These are average values for the entire run. They do not mean you maintained exactly the same speed at every moment.
What do all the numbers mean?
Pace per kilometre (min/km)
The average time needed to run one kilometre. A pace of5:00 min/km means five minutes per kilometre. For the same distance, a smaller pace time is faster.
Pace per mile (min/mile)
The average time needed to run one mile. This lets you compare runs measured using miles with runs measured using kilometres.
Average speed (km/h and mph)
Distance covered in one hour at the calculated average speed. Speed is expressed as distance per hour; pace is expressed as time per distance.
Converted distance (km and miles)
The distance you entered is shown in both units. For example, five kilometres is approximately 3.11 miles.
Running pace formulas
The calculator first converts the entered time into seconds. It then divides the time by the run's distance.
In the 5K example, 25 minutes is 1,500 seconds. Dividing 1,500 by five gives 300 seconds per kilometre, or 5 minutes exactly.
To calculate pace per mile, multiply seconds per kilometre by 1.609344. To calculate average speed in kilometres per hour, divide the distance in kilometres by the time in hours.
The calculator rounds displayed pace to the nearest second and speed to two decimal places. That small rounding difference does not change the underlying calculation.
Example: 10K in 55 minutes
Enter a distance of 10 km and a time of 0 hours, 55 minutes, and 0 seconds. The calculator will return approximately5:30 min/km, 8:51 min/mile, and 10.91 km/h.
This example shows why pace per mile is a larger time value than pace per kilometre: a mile covers more distance than a kilometre.
Tips for accurate results
- Match the distance unit. If your watch reports miles, select Miles instead of Kilometres.
- Enter elapsed time consistently. If you include stopped time on one run but exclude it on another, their calculated averages may not be directly comparable.
- Use the correct time fields. For 1 hour and 5 minutes, enter 1 hour, 5 minutes, and 0 seconds—not 65 minutes.
- Remember pace is an average. Hills, walking breaks, and changes in speed may all occur during a run with the same overall average pace.
- Do not confuse pace with prediction. This calculator describes an entered result; it does not promise a future race time.
Frequently Asked Questions
What should I enter if my run was less than one hour?
Enter 0 in Hours, then enter the correct Minutes and Seconds. For example, a 28-minute, 30-second run is 0 hours, 28 minutes, and 30 seconds.
What if I ran a distance measured in miles?
Enter your distance and select Miles from the dropdown. The calculator converts it to kilometres before calculating results in both unit systems.
Can I use a distance that is not a standard race length?
Yes. Enter a custom positive distance in the distance field. You do not need to choose a preset.
Why does the calculator show both min/km and min/mile?
Runners and training plans use different measurement systems. Both values describe the same average running speed in different distance units.
Why did the calculator reject my time?
Check that the total time is greater than zero, that minutes and seconds are between 0 and 59, and that hours, minutes, and seconds contain whole numbers.
Will a 5:00 min/km pace guarantee a particular race result?
No. It describes an average pace. Maintaining it for another distance depends on your fitness, endurance, terrain, conditions, and training.