Pace Calculator
Free running pace calculator. Calculate pace per km and per mile, speed in km/h and mph, and estimated finish times for 5K, 10K, half marathon, and marathon.
About This Calculator
Our pace calculator helps runners, joggers, and walkers determine their running pace per kilometer or mile, speed in km/h or mph, and estimated finish times for standard race distances including 5K, 10K, half marathon, and marathon. Simply enter the time you spent running and the distance you covered to get a comprehensive breakdown of your performance metrics.
The calculator uses the standard formula: Pace = Time / Distance, and Speed = Distance / Time. Pace is expressed in minutes per unit distance (e.g., 6:00 per km), while speed is expressed in distance per hour (e.g., 10 km/h). These two values are inversely related — a faster pace (lower number) means a higher speed. The finish time estimator assumes a constant pace throughout the race, multiplying your current pace by standard race distances to predict your finish time for each distance.
Pace and speed training are essential for runners at every level. Using a pace calculator helps you set realistic race goals, plan interval training sessions, and track improvement over time. For beginners, focusing on maintaining a consistent pace is more important than speed, while advanced runners can use pace targets to structure workouts like tempo runs and race-pace intervals.
Frequently Asked Questions
How do I calculate running pace?
Pace = time / distance. For example, if you run 5km in 30 minutes, your pace is 6:00 per km. To convert to speed: speed = distance / time. Our calculator does both automatically and provides finish times for standard race distances.
What is a good running pace?
Average running paces: Beginner: 7:00-9:00/km, Intermediate: 5:00-6:30/km, Advanced: 4:00-5:00/km, Elite: sub-4:00/km. For context: a sub-30 min 5K is 6:00/km, sub-20 min 5K is 4:00/km, sub-4 hour marathon is 5:41/km.
How do I improve my running pace?
Improve pace with: 1) Interval training (400-800m repeats at target pace), 2) Tempo runs (20-40 min at 80-85% max HR), 3) Long slow runs for endurance, 4) Strength training for running economy, 5) Proper running form, 6) Consistency and progressive overload.
What is the difference between pace and speed?
Pace is time per unit distance (min/km or min/mile), while speed is distance per unit time (km/h or mph). Pace is more commonly used by runners because it directly relates to effort. A 5:00/km pace equals 12 km/h.
What are standard race finish times in km and miles?
Standard race distances: 5K (5 km / 3.1 mi), 10K (10 km / 6.2 mi), half marathon (21.1 km / 13.1 mi), and marathon (42.2 km / 26.2 mi). Our calculator estimates your finish time for all of these based on your current pace.
How does unit choice affect pace calculation?
Choose km for metric pace (min/km) or miles for imperial pace (min/mile). The unit changes the pace formula output and the estimated finish time distances. 1 mile = 1.609 km. Our calculator supports both units seamlessly.
How accurate is the race finish time estimator?
The finish time estimator assumes you maintain a constant pace throughout the race, which is a reasonable approximation for most runners. Actual race times vary based on terrain, weather, fatigue, and race-day factors. Use it as a planning tool, not a guarantee.
What should I eat to improve my running pace?
Runners benefit from eating 30 grams of carbs 30 minutes before running for energy. A balanced diet with adequate protein aids recovery, and leg strength training can increase muscle mass and speed. Stay hydrated before, during, and after runs.