Calculated result
Enter values and select Calculate.
Pace formulas
Pace = time ÷ distance. Time = pace × distance. Distance = time ÷ pace.
Example: 5 kilometers in 25 minutes is 5:00 per kilometer and approximately 8:02.8 per mile.
Distance conversion
The calculator uses exactly 1 mile = 1,609.344 meters and 1 kilometer = 1,000 meters. Race presets use 5,000 meters, 10,000 meters, 21,097.5 meters for a half marathon, and 42,195 meters for a marathon.
Limits and interpretation
Results are arithmetic averages across the entered distance, not a prediction of actual race performance. Terrain, stops, route measurement, device accuracy, weather, and changing effort can affect real pace.