Heart Rate Zone Calculator

By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results

Heart Rate Zone Calculator

Interactive Heart Rate Zone Calculator

JavaScript is required for the interactive calculator. Enable JavaScript to use this tool.

How to Use This Calculator

Step-by-Step Instructions

  1. Enter your age
  2. Enter your resting heart rate (bpm)
  3. Enter your max heart rate
  4. Enter your zone 1: recovery (50-60%)
  5. Enter your zone 2: fat burn (60-70%)
  6. Enter your zone 3: cardio (70-80%)
  7. Enter your zone 4: threshold (80-90%)
  8. Enter your zone 5: max (90-100%)
  9. Results appear instantly — no button needed

Formula

Mathematical Formula

Max HR = 220 − Age; Zone = Resting HR + (Max HR − Resting HR) × Zone %

How It Works

Max HR = 220 − Age; Zone = Resting HR + (Max HR − Resting HR) × Zone %

Frequently Asked Questions

How does this work?

Enter values and get instant results using the formula shown.

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