Target Heart Rate Calculator
Calculate your training heart rate zones (50–85% of heart rate reserve) using the Karvonen formula.
What is Target Heart Rate?
Maximum Heart Rate (MHR) ≈ 220 − age. Karvonen uses Heart Rate Reserve (MHR − resting HR) to set personalized zones.
How is it calculated?
Target HR = ((MHR − resting HR) × intensity %) + resting HR.
Frequently Asked Questions
- Why include resting heart rate?
- It accounts for cardiovascular fitness; fitter people have lower resting HR and a wider reserve.