Running Pace Calculator
Work out your running pace per kilometre and your speed from the distance and time of your run.
Pace is shown as minutes:seconds per kilometre.
What Is a Running Pace Calculator
A Running Pace Calculator turns a distance and a time into the numbers runners care about: your pace per kilometre, your speed in kilometres per hour, and your pace per mile. Enter how far you ran and how long it took, and the tool does the conversions instantly.
Pace is the language of running. Coaches set workouts in minutes per kilometre, race plans are built around target paces, and personal bests are tracked the same way. Knowing your pace lets you judge effort, compare runs fairly, and pace a race so you do not start too fast and fade.
How It Works
The calculator uses straightforward formulas based on your total time in seconds and your distance in kilometres:
- Pace (seconds per km) = total seconds divided by distance in km.
- Speed (km per hour) = distance in km divided by (total seconds divided by 3600).
- Pace per mile = pace per km multiplied by 1.609, since one mile is about 1.609 km.
The pace in seconds is then shown in the familiar minutes and seconds format, such as 5:00 per km. From the same inputs you can read your speed and your mile pace, which is useful when following training plans or race results that use miles.
Worked Example
Imagine you run 5 km in 25 minutes. That is 1500 seconds over 5 km, so your pace is 1500 divided by 5 = 300 seconds per km, which is 5:00 min/km. Your speed is 5 km divided by (1500/3600 hours) = 12 km/h. Converting the pace to miles, 300 seconds times 1.609 gives about 483 seconds per mile, or roughly 8:03 min/mile. These three figures describe the same effort in the units different runners prefer.
Using Pace in Training
Once you know your current pace, you can plan races and workouts around it. Predict a finish time by multiplying your target pace by the race distance, or work backwards from a goal time to find the pace you need to hold. Many runners use easy runs at a comfortable pace, then add faster intervals at a target race pace to build speed.
Pace also helps you spread effort evenly. Going out too quick in a 10K or half marathon is the most common pacing mistake, and a steady, planned pace usually beats a fast start. Track your pace across weeks to see fitness improve, and adjust for heat and hills, which naturally slow you down on tougher days.
Frequently Asked Questions
Pace is the time it takes to cover a set distance, usually shown as minutes and seconds per kilometre or per mile. A pace of 5:00 min/km means you run each kilometre in five minutes.
Speed in km/h equals distance in km divided by time in hours. A pace of 5:00 min/km is the same as 12 km/h, because you cover 12 km in one hour at that pace.
Multiply your pace per kilometre by 1.609, the number of kilometres in a mile. A 5:00 min/km pace works out to about 8:03 min/mile.
Many new runners finish a 5K between 30 and 40 minutes, which is a pace of about 6:00 to 8:00 min/km. The right pace is one you can sustain comfortably, and it improves with regular training.
Yes. Multiply your target pace by 42.195 km to estimate a marathon finish. Remember that pace often slows over very long distances, so plan a realistic, sustainable pace.
Climbing and hot weather both raise the effort needed to hold a pace, so the same effort produces a slower time. It is normal to ease your target pace on tough days.