Pace Calculator
Calculate your running pace, speed, and finish time for any distance.
What Is a Pace Calculator?
A pace calculator helps runners, cyclists, and swimmers determine how fast they are moving by expressing time per unit of distance. Pace is typically shown as minutes and seconds per kilometre (min/km) or per mile (min/mi), making it easy to plan race strategies, track training progress, and estimate finish times.
Pace, Time, and Distance Formulas
The three core relationships are:
- Pace = Time ÷ Distance
- Time = Pace × Distance
- Distance = Time ÷ Pace
- Speed = Distance ÷ Time (expressed in km/h or mph)
How to Use This Calculator
Choose what you want to solve for — pace, time, or distance — then enter the two known values. The calculator converts between kilometres and miles automatically and displays pace in both units along with your speed. For example, if you ran 10 km in 50 minutes, your pace is 5:00 per km, your pace per mile is 8:03, and your speed is 12.0 km/h (7.46 mph).
Common Race Distances and Target Paces
- 5K: A common target for beginners is 25–35 minutes (5:00–7:00 per km).
- 10K: Recreational runners often aim for 50–70 minutes.
- Half marathon (21.1 km): A 2-hour finish requires a pace of about 5:41 per km.
- Marathon (42.2 km): A 4-hour marathon requires a pace of about 5:41 per km; a sub-3-hour marathon needs 4:15 per km.
Tips for Improving Your Pace
Improving pace comes from a mix of endurance, speed work, and consistency. Build a strong aerobic base with easy long runs, then add interval training and tempo runs to raise your lactate threshold. Track your pace with a GPS watch or this calculator to measure progress over weeks. Remember that pace varies with terrain, weather, and fatigue — compare similar conditions for meaningful trends. Always warm up, cool down, and listen to your body to avoid injury.
Frequently Asked Questions
Pace is calculated by dividing total time by distance. For pace per kilometre, divide the time in seconds by the distance in kilometres, then convert back to minutes and seconds. For example, running 5 km in 25 minutes gives a pace of 5:00 per km.
A pace of 6:00–7:30 per kilometre (9:40–12:00 per mile) is typical for beginner runners. As fitness improves, pace generally drops to 5:00–6:00 per km for recreational runners and below 4:00 per km for competitive athletes.
Speed is the reciprocal of pace. Convert pace to seconds per unit, then divide 3600 by that number to get km/h or mph. For example, a pace of 5:00 per km (300 seconds) equals 3600 ÷ 300 = 12 km/h.