Pace Per Mile/KM: The time it takes to cover one mile or one kilometer at your average speed. Lower numbers mean faster running — a 7:00/mile pace is quicker than 9:00/mile.
Speed (mph or kph): Your average velocity expressed as distance per hour. Useful for comparing to treadmill readouts or cycling speeds.
Total Time: The predicted finish time when you provide a distance and pace. This is a flat-road average — hills, wind, and fatigue can add minutes in practice.
Total Distance: The distance covered when you provide a pace and total time. Helpful for estimating how far your tempo run or walk actually went.
How This Calculator Works
You pick one of three modes: compute pace from distance and time, predict time from distance and pace, or derive distance from pace and time. The tool divides or multiplies total seconds and distance, then converts between per-mile and per-kilometer paces using the 1.60934 km/mile factor. It assumes a constant flat pace with no adjustment for elevation, wind, or fatigue.
Quick Questions
What is a good running pace for beginners?
Most new runners start between 10:00 and 13:00 per mile (6:15–8:05 per km). As fitness improves over weeks of consistent training, pace typically drops by 30–60 seconds per mile.
How do I convert pace to speed on a treadmill?
Divide 60 by your pace in minutes per mile. For example, a 10:00/mile pace equals 6.0 mph. This calculator shows the conversion automatically in the Speed result row.
Why does my actual race pace differ from training?
Adrenaline, course elevation, weather, and hydration all shift real-world pace. Most coaches recommend running easy training miles 1–2 minutes slower than your goal race pace.
Can I use this for walking?
Yes. Walking paces typically fall between 15:00 and 20:00 per mile (9:20–12:25 per km). The math is identical — just enter your walking distance and time.
What common race distances should I know?
Standard race distances are 5K (3.1 mi), 10K (6.2 mi), half marathon (13.1 mi / 21.1 km), and marathon (26.2 mi / 42.2 km). Enter these distances with your target pace to predict finish time.