Running Pace Calculator
Calculate your running pace, average speed, and finish time.
Inputs
Allowed range: 0.1 to 1000
Allowed range: 0.1 to 10000
Results
How it works
Pace = time ÷ distance. Speed = distance ÷ time. We compute both from your inputs.
Complete guide
Pace is the most useful number in distance running because it directly tells you how fast each kilometer or mile feels. Most runners think and train in pace (minutes per km or mile), while treadmills and cyclists think in speed (km/h or mph).
Enter the distance you covered and how long it took (in minutes). The calculator returns pace per kilometer, pace per mile, average speed, and the projected finish time at the same pace for a 5K, 10K, half marathon, and full marathon.
Reference paces for 30-year-old recreational runners — 5K: 25–30 min (5:00–6:00 /km). Marathon finish: 4:00–4:30 (5:40–6:25 /km). Elite marathoners hold under 3:00 /km for over two hours.
Frequently asked questions
- Can I trust GPS-watch pace?
- Mostly yes, but instant pace bounces wildly. Use lap pace or average pace for a smoother number, especially in cities or under tree cover.
- Why does my pace slow on long runs?
- Glycogen depletion, dehydration, and accumulated fatigue all gradually slow you down. Practicing fueling and pacing in training is how marathoners avoid the late-race crash.
- How do I convert pace to speed?
- Speed (km/h) = 60 ÷ pace (min/km). A 6:00 /km pace equals 10 km/h.
- Is the projected marathon time realistic?
- Only if you've trained for the distance. Holding 5K pace for 42 km is impossible for almost everyone — fade is normal and accounted for in real race plans.