Calculate pace, speed, distance, finish time, splits, and same-pace race projections for running, walking, cycling, or another distance activity.
Pace describes the time needed to cover a unit of distance, commonly minutes per kilometer or minutes per mile. A lower time per unit means a faster pace.
Speed expresses the same movement as distance per hour. Calculations retain meters and seconds internally before presenting metric and imperial results.
Converted to time per kilometer and mile.
Pace = time ÷ distanceFinish time = distance × paceDistance = time ÷ pacePace and Speed modes share this distance-and-time calculation.
Speed = distance ÷ timeCovering 5 km in 25:00 is 5:00 min/km, approximately 8:03 min/mile, 12 km/h, and 7.46 mph.
Holding 5:00 min/km across 10 km produces a same-pace finish time of 50:00.
Terrain, surface, weather, stops, and elevation can change the effort required for the same pace.
A half marathon is 21.0975 km and a marathon is 42.195 km.
When distance is not an exact multiple of the split, the final row is accurately shortened and labeled partial.
Pace is time per distance; speed is distance per time. They describe the same performance from opposite directions.
One international mile is exactly 1,609.344 meters. Exact distance conversion preserves accuracy.
The presets use exact standard distances. Splits create equal checkpoints plus an accurately shortened final row where necessary.
Finish time at the same pace is a straight mathematical extrapolation. It does not predict whether that pace can be sustained and is not a physiological race-equivalency model.
Divide elapsed time by distance, then express the result as minutes and seconds per kilometer or mile.
Multiply target distance by pace using consistent units.
Pace is time per distance; speed is distance per time.
Yes. Marathon uses 42.195 km and half marathon uses 21.0975 km.
It represents the exact distance remaining after all full splits.
No. They extend the same pace mathematically and do not model fatigue or endurance.
Yes. The same distance, time, pace, and speed relationships apply.
Standard unit and race-distance definitions.