Heart Rate Training Level Calculator
 
Age
Maximum heart rate (MHR)
Level 1 Active Recovery
Level 2 Aerobic workout
Level 3 Time trialing
Level 4 Sprinting / intervals

This tool calculates heart rate training values based upon the BCF/Peter Keen guidelines.

For those who have no idea of thier maximum heart rate (MHR) it is estimate here from the equation MHR=220-age.