BMI Calculator
Calculate Body Mass Index with metric or imperial units, category, and healthy weight range.
Heart Rate Calculator
Estimate max heart rate and fat-burn, cardio, and peak training zones.
Introduction
Training heart-rate zones help pace cardio workouts. This calculator estimates maximum heart rate from age and builds fat-burn, cardio, and peak zones. If you provide resting heart rate, Karvonen (heart-rate reserve) zones are used for a more personalized range.
Benefits
- Fat burn, cardio, peak zones
- Optional Karvonen method
Educational wellness tool only — not medical advice. Consult a qualified healthcare professional for personal decisions.
How It Works
- Enter age
- Optionally enter resting HR
- Review max HR and training zones
Formula Used
Max HR ≈ 220 − age; zones via %HRmax or Karvonen
Examples
Example: Age 40 → max ≈ 180 bpm; fat burn roughly 90–108 bpm (% method).
Frequently Asked Questions
Is 220 − age exact?
It is a population estimate; individual max HR can differ.
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Blood Pressure Checker
Classify blood pressure readings using AHA adult categories with recommendations.