Target Heart Rate Calculator
Modify the values and click the Calculate button to use. Calculate your optimal heart rate zones for effective exercise.
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Max Heart Rate
Max Heart Rate Formula
Haskell & Fox (1971)
Resting Heart Rate
Optional: Leave blank if unknown
Activity Intensity Scale
The Karvonen Formula
Understanding Heart Rate
Heart rate is a measure of the number of contractions the heart makes per minute. It is measured in beats per minute (bpm). To effectively use this target heart rate calculator, it is important to understand the concepts of resting heart rate, maximum heart rate, and heart rate reserve.
Resting Heart Rate (RHR)
Your heart rate at complete rest, typically measured in the morning before getting out of bed.
Maximum Heart Rate (MHR)
The highest heart rate you can achieve during maximum physical exertion.
Heart Rate Reserve (HRR)
The difference between your maximum heart rate and your resting heart rate (MHR - RHR).
Your Results Will Appear Here
Fill in your information and click "Calculate" to see your personalized target heart rate zones.
Using the Karvonen formula for accurate zone calculation
Heart Rate Zone Calculator
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Professional & Responsive Heart Rate Calculator Design
Our Heart Rate Zone Calculator features a clean, modern blue-themed UI designed for both performance and aesthetics. The fully responsive layout adapts seamlessly across mobile phones, tablets, laptops, and desktop screens, ensuring an excellent user experience on any device.
The interface uses attractive cards with soft shadows, smooth hover effects, and subtle animations, making the calculator visually engaging while remaining fast and lightweight.
Advanced Interactive Heart Rate Zone Calculator
This interactive heart rate calculator allows users to easily calculate their target heart rate zones with flexible options:
Toggle between estimating maximum heart rate by age or manually entering a test-based max heart rate
Choose from three scientifically recognized max heart rate formulas
Select from three configurable activity intensity scales for personalized results
One-click Calculate and Clear buttons with instant visual feedback
These features make the tool ideal for fitness enthusiasts, runners, athletes, and health-conscious users.
Detailed & Animated Heart Rate Zone Results
After calculation, results are displayed in a smooth animated card for better readability. The calculator clearly shows:
Four heart rate zones:
Very Light Intensity
Light Intensity
Moderate Intensity
Hard / High Intensity
Calculated Maximum Heart Rate (MHR)
Resting Heart Rate (RHR)
Heart Rate Reserve (HRR)
This makes it easy to understand your ideal workout intensity levels for fat burning, endurance, and cardiovascular fitness.