What paces should I train at after this race result?
Turn a race result into VDOT, equivalent performances, and training paces.
Best for
Recent race results and training pace checks
Output
VDOT, paces, predictions
All tools
Endurance Training Tools
Estimate fitness, set zones, and convert workout files without turning a simple training question into a spreadsheet.
Capacity and zones
8VO2 Max
VO2 Max Calculator
What does this test say about my aerobic capacity?
Estimate VO2 Max from field-test results and see a simple fitness-level interpretation.
Best for
Field tests and aerobic fitness checks
Output
VO2 Max, fitness level
What FTP or CP estimate can I get from this file?
Upload a GPX, FIT, or TCX activity file to estimate FTP, Critical Power, and W'.
Best for
Activity files with power data
Output
FTP (plus CP/W')
What are my current CP, W', and eFTP values?
Fit CP, W', Pmax, and eFTP from your best mean-power efforts.
Best for
Best-effort power points and CP/W' fitting
Output
CP, W', Pmax, eFTP
Where should I set threshold heart rate, power, or pace?
Estimate threshold heart rate, threshold power, and threshold pace from common field tests.
Best for
Field-test thresholds for run and bike training
Output
HR/power/pace thresholds
What max heart rate should I use as a starting point?
Compare common HRmax formulas and turn the result into usable heart-rate zones.
Best for
A quick HRmax estimate before setting zones
Output
HRmax, Zone 1-5
Which heart-rate zone model fits my data?
Build heart-rate zones from HRR, LTHR, or max heart rate, depending on the data you trust most.
Best for
Heart-rate zones from the data you already have
Output
HR zones (bpm)
What watt ranges should I use for each training zone?
Calculate power-zone boundaries from FTP or CP using Friel, Vance, or Stryd models.
Best for
Structured workouts based on FTP or CP
Output
Power zones (watts)
File tool / Route
2GPX / FIT / TCX
GPX / FIT / TCX Converter
How do I convert this workout file?
Convert GPX, FIT, and TCX workout files when a platform or device needs a different format.
Best for
Moving workouts between platforms and devices
Output
GPX, FIT, TCX
FIT Course
FIT Course Converter
How do I turn this route into a device-ready FIT Course?
Convert route files into FIT Course files you can load onto compatible sports devices.
Best for
Preparing route files for sports devices
Output
FIT Course