Use our converter to predict finish times at popular distances, define training zones, and generate equivalents by altitude, temperature and elevation profile.
Your reference race
Format: mm:ss or h:mm:ss
Enter a valid distance and time.
Predicted times Riegel Formula
Based on your result, we estimate how you would perform at other distances.
Distance
Time
Pace /km
Pace /mi
Training paces
Zone
Description
Pace /km
Pace /mi
E = Easy · M = Marathon · T = Threshold/Tempo · I = Intervals · R = Repetitions
Race pace
Equivalent times by altitude
At higher altitudes, air is less dense and performance decreases. The effect is notable above 1,500m (4,900ft).
Altitude
Equivalent time
Pace /km
Difference
* Projections may vary depending on the athlete's degree of acclimatization and prior exposure to the target competition altitude.
Equivalent times by temperature
Above 16°C (60°F) performance decreases progressively and accelerates with heat.