Running Pace Calculator
Plan your race strategy with precise pacing and splits.
3.1 miles
Mastering Your Race Pace
Pacing is the most critical element of race execution. Going out too fast in the first mile is the most common mistake runners make, leading to a catastrophic "bonk" later in the race.
Negative Splitting
Most world records from the 1500m to the marathon have been set using a negative split strategy — running the second half of the race slightly faster than the first. For a recreational runner aiming for a 2-hour half marathon, this means starting at a 9:20 pace and dropping to an 8:55 pace by the end.
Training Paces
You shouldn't run race pace every day. 80% of your training should be done at an easy pace (typically 1:30 to 2:00 minutes per mile slower than your 5K race pace). This builds aerobic capacity without excessive fatigue or injury risk.
Pace Formula
Pace is usually expressed in minutes and seconds per mile or kilometer. Speed = Distance ÷ Time.