Pace/Running Converter
Convert running paces between min/km and min/mile, calculate race times, and view pace zones. All calculations happen locally — nothing leaves your browser.
How to Use the Pace Converter
- Enter your pace — input min/km, min/mile, or speed in MPH/KPH.
- Convert automatically — see all equivalent values instantly.
- Predict race times — see estimated finish times for common race distances.
- View pace zones — understand your training intensity zones.
Understanding Running Pace
Pace is the inverse of speed — it measures time per distance rather than distance per time. Runners typically track pace in minutes per kilometer (min/km) or minutes per mile (min/mile). The conversion factor is 1 mile = 1.60934 km.
Training in different pace zones builds different fitness qualities. Easy runs (Z2) build aerobic base, tempo runs (Z3) improve lactate threshold, and intervals (Z4-Z5) boost VO2 max.
Frequently Asked Questions
Multiply your min/km pace by 1.60934. For example, 5:00/km = 8:03/mile. This calculator does it automatically.
Predictions use Riegel's formula and are estimates based on your current fitness. Actual times depend on terrain, weather, training, and race-day conditions. They're useful for goal setting and pacing strategy.
Most training (80%) should be in Z2 (easy). The remaining 20% can be split between tempo (Z3) and intervals (Z4-Z5). This "polarized" approach is backed by research for optimal performance gains.
Use Cases
Race Pace Conversion
Convert min/km to min/mile and vice versa for international race preparation and training.
Marathon Pacing
Plan marathon pacing strategy with estimated finish times for different race distances.
Comparing Running Speeds
Compare running speeds in different units to understand performance across measurement systems.
Calculating Finish Times
Predict finish times for 5K, 10K, half marathon, and marathon based on current pace.
Training Zone Conversion
Convert training paces between units to set proper training zones for workouts.