5K
5K race time predictor
Estimate your 5K from a 10K, zone 2, weekly km and experience. Ideal for “what will you run for 5K?” social content.
- Riegel-style distance model
- Volume and zone 2 calibration
- Km-by-km splits
- 10K / half / marathon equivalents
Enter your marks and calculate to see estimated time, pace, splits and equivalents.
How we estimate your 5K
We extrapolate pace with a Riegel-style formula from 5K/10K and calibrate with zone 2 and weekly volume. Confidence rises when you provide more than one recent mark.
Indicative estimate based on pace and fatigue models. It does not replace a plan with real history, recent tests, or race-day conditions (heat, elevation, HYROX penalties).
I want the predictor with my real history
Create a free account · Pro uses your athlete memory