Target Heart Rate Calculator

Karvonen-style training heart-rate zones from age and resting HR.

Target Heart Rate Calculator helps you karvonen-style training heart-rate zones from age and resting HR. Enter age and resting heart rate, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Target Heart Rate calculator does Target Heart Rate Calculator is built for body measurements, calories, and everyday health math. Karvonen-style training heart-rate zones from age and resting HR. You enter age and resting heart rate, then Simple Calculators computes the result instantly. These tools use widely published formulas. They are educational screens, not a diagnosis. How the math works Enter your Age and Resting heart rate in beats per minute (bpm). The calculator estimates your maximum heart rate as 220 − age, then your heart-rate reserve (maximum − resting). Each target is resting + reserve × intensity — the Karvonen method — shown for five zones from 50% to 100% of reserve. The 220 − age rule is an average; your real maximum can be 10–20 bpm higher or lower. The formula: Target = resting + (220 − age − resting) × intensity. Intensity is a percent of heart-rate reserve, e.g. 0.5 to 0.7 for moderate exercise.