Training zone calculators
Three free calculators for figuring out your training zones for pace, power and heart rate in swimming, cycling and running.
Use the run training zones calculator for running pace and heart rate zones, based on any race or time trial between 15-30 minutes in duration. Use the FTP calculator to calculate Functional Threshold Power, and power and heart rate zones for cycling based on a classic 20-minute test.
If you prefer the critical power model over a single time trial, the critical power and critical speed calculator covers swim, bike and run in one place, and will give you both pace/power and heart rate zones for all three disciplines, based on two to five time trials in between two and twenty minutes in duration each.
All three are free and need no signup.