HEALTH CALCULATOR
Target Heart Rate Zone Calculator
A precise tool.
What is the Target Heart Rate Zone Calculator & How does it work?
Understanding your heart‑rate zones helps you train more efficiently and safely. By staying within the recommended zone, you can improve cardiovascular fitness, burn fat, and avoid over‑exertion.
The Karvonen method personalises the zone using your age, resting heart rate (RHR) and the desired exercise intensity. It calculates the heart‑rate reserve (HRR) – the difference between your maximum heart rate and RHR – then applies the chosen intensity percentage.
Enter your age, resting heart rate and the intensity range you plan to work at. The calculator will output the lower and upper bounds of your target heart‑rate zone in beats per minute (bpm).
\text{THR} = ((220 – \text{age} – \text{RHR}) \times \text{intensity}) + \text{RHR}
intensity = desired effort as a decimal (e.g., 0.70 for 70%)
Parameters
Result
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Frequently Asked Questions
How do I calculate my maximum heart rate?
Subtract your age from 220 to estimate your maximum heart rate.
What is a resting heart rate (RHR)?
Your RHR is the lowest number of times your heart beats per minute while you are at rest.
How does the Karvonen method work?
It calculates your heart-rate reserve by subtracting your resting heart rate from your maximum heart rate, then applies the desired intensity percentage.
What are the benefits of using target heart rate zones?
Staying within these zones helps improve cardiovascular fitness, burn fat, and prevent over-exertion during exercise.
How do I determine my desired exercise intensity percentage?
This depends on your fitness goals. For example, 50-60% for light exercise, 70-80% for moderate exercise, and 80-90% for intense exercise.
Can I use this calculator if I have a heart condition?
It’s best to consult with a healthcare professional before using any heart rate zone calculators if you have a pre-existing heart condition.
How often should I recalculate my target heart rate zones?
Recalculate your zones annually or whenever there are significant changes in your fitness level or resting heart rate.
Results are for informational purposes only and do not constitute professional advice.