Target Heart Rate Calculator
Find training zones based on max or heart-rate reserve.
Zone table
Karvonen option
Multiple formulas
Train in the right zone
Heart-rate zones help balance endurance, tempo, and high-intensity work.
Assumptions
Uses a selected max HR formula and calculates zones from % max HR or heart-rate reserve when chosen.
Resting HR improves accuracy
If you know your resting heart rate, the Karvonen method adjusts zones to your personal baseline.