A simple calculator where you input your age (and optionally your resting heart rate) to find your safe & effective workout heart-rate zones (including a “Karvonen” method zone).
Target Heart Rate Calculator
How to Use?
- Enter your age
- (Optional) Enter resting heart rate
- Press Calculate
- View standard zones + Karvonen (accurate) method
- Use the share button to send your results
Why Use?
✔ Know your safe training intensity
✔ Prevent over-training
✔ Improve fat-burning efficiency
✔ Get accurate HR zones using science
✔ Perfect for gym, running, cycling, and weight loss
📋 Things to keep in mind!
The basic method (age-based) gives a general safe range, but the optional resting HR + Karvonen method gives more personalized zones (more accurate for many people).
These are guidelines. We do not replace individual medical advice-if you have heart conditions or are unsure about exercise intensity, consult a medical professional.
Your actual “safe” zone might vary depending on fitness level, medications, health conditions, etc.
For best results: measure your resting heart rate in the morning (while still, relaxed) for accuracy, and make sure your age entry is correct.
Using HR zones is helpful for structuring workouts: e.g., warming up in lower zones, doing intervals in higher zones, cooling down in moderate zones.
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