What you provide
What you provide
- Known race distance: Distance of the representative completed effort.
- Known elapsed time: Representative completion time for the known distance.
- Target race distance: Distance for the projected finish.
RUNNING / RIEGEL PROJECTION
Race Time Predictor Calculator
Project a target running time from one known performance using the Riegel distance exponent, with target pace and distance change.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Known time is multiplied by the target-to-known distance ratio raised to the standard 1.06 Riegel exponent.
Calculation path
Predicted time = known time x (target distance / known distance)^1.06.
What you receive
What you receive
- Predicted target finish time
- Projected minutes and pace
- Distance-change percentage
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
Training specificity, endurance, terrain, weather, altitude, fueling, injury, pacing, and exponent fit can make actual performance differ.
Planning and fitness outputs are estimates. Confirm measurements, product specifications, site conditions, health context, and professional requirements before making purchasing, training, medication, or care decisions.