Heart Rate Calculator
Free online Heart Rate Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Max HR = 220 - Age. Target HR (Karvonen) = (Max - Resting) x Intensity% + Resting. Resting HR: measure morning pulse. Zones: 50-60% warm-up, 60-70% fat burn, 70-80% cardio.
Example Calculations
Target Zones
Input: Age: 35, Resting HR: 65 BPM
Result: Fat burn: 124-140, Cardio: 140-157 BPM
Max Heart Rate
Input: Age: 45
Result: Max HR: 175 BPM, Moderate: 88-123, Vigorous: 123-149
Karvonen Method
Input: Age: 30, Resting: 60, Target: 70% intensity
Result: Target HR: 153 BPM
About This Calculator
Free online heart rate calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our heart rate calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
Normal resting heart rate?
60-100 BPM for adults. Athletes may have 40-60 BPM. Lower generally indicates better fitness.
Target heart rate for exercise?
Max HR = 220 - age. Moderate (50-70%): 30yo targets 95-133 BPM. Vigorous (70-85%): 133-161.
Heart rate reserve method?
Karvonen: Target = (Max - Resting) x intensity + Resting. More personalized than simple percentage.
Measure heart rate accurately?
Two fingers on wrist/neck, count 15 sec x 4. Chest strap monitors most accurate during exercise.
When concerned about heart rate?
Consistently above 100 BPM or below 60 with symptoms. Irregular beats warrant medical attention.