80/20 Endurance Zone Calculator
If you have one of our convenient 80/20 Endurance electronic plans, your custom zones are auto-calculated directly within each workout and this calculator is not necessary. Otherwise, use this calculator to identify your individual training intensity zones. For details on determining LTHR, TP, CV, and FTP, please see Intensity Guidelines for Triathlon and Running. You don't need an 80/20 training plan or TrainingPeaks account to utilize the calculator. Use the Reset button below to reset values. This calculator performs best on a desktop or tablet.