Heart Rate Zone Calculator
Five training zones from max HR.
Take first thing in the morning, still in bed.
Overrides the age-based estimate.
Estimated max HR
187 bpm
- Zone 1 · Recovery94–112 bpm
- Zone 2 · Endurance112–131 bpm
- Zone 3 · Tempo131–150 bpm
- Zone 4 · Threshold150–168 bpm
- Zone 5 · VO₂ max168–187 bpm
Introduction
Five zones for structured cardio training. If you enter a resting heart rate we use the Karvonen (heart-rate reserve) method for a personalised range.
What is Heart Rate Zone Calculator?
Heart Rate Zone Calculator helps you five training zones from max hr. It belongs to the Cardio group within health and fitness tools on The Daily Tools. Enter your values, get an immediate result, and adjust inputs to explore different scenarios.
Definition: Heart Rate Zone Calculator is a free, browser-based calculator that five training zones from max HR.
Formula
Max HR ≈ 220 − age; zones as percentages of max HR
How it works
Max HR. Default estimate uses Tanaka: 208 − 0.7 × age. If you know your true max (from a lab test or steep hill effort), enter it below.
Karvonen. When a resting HR is supplied, zones use heart-rate reserve (max − rest) × %, then add resting HR back.
Worked example
Example: Using the Heart Rate Zone Calculator
Inputs: Enter values relevant to cardio — for example, the measurements or amounts described in the tool fields above.
- Open the Heart Rate Zone Calculator and review the input fields.
- Apply the formula: Max HR ≈ 220 − age; zones as percentages of max HR
- Adjust inputs to compare scenarios side by side.
You receive an immediate five training zones from max hr — useful for planning and comparison.
Use cases
- Quick cardio estimates during planning or study
- Comparing scenarios by adjusting inputs in the Heart Rate Zone Calculator
- Private calculations when you don't want data uploaded to third-party servers
- Searching for "heart rate zones" and needing an instant answer
- Searching for "max hr" and needing an instant answer
Advantages
- 100% browser-based — your data never leaves your device
- No sign-up, no ads required to calculate
- Instant results with a clean, readable interface
- Works offline after the page loads
- Transparent formula shown on this page
Limitations
- Results are estimates — not professional medical, financial, legal, or religious advice
- Individual health varies — consult a healthcare provider for personal guidance
- The Daily Tools does not save your history between sessions
Frequently asked questions
- Is the Heart Rate Zone Calculator free to use?
- Yes. Heart Rate Zone Calculator on The Daily Tools is completely free, requires no account, and runs entirely in your browser.
- Does The Daily Tools store my inputs?
- No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.
- Who should use the Heart Rate Zone Calculator?
- Anyone who needs a quick health and fitness estimate — students, professionals, or everyday users exploring cardio questions.
- How accurate is the Heart Rate Zone Calculator?
- Results follow the standard formula shown on this page. They are estimates for planning — not a substitute for professional medical advice.
- Can I use the Heart Rate Zone Calculator on mobile?
- Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.
Sources & references
- World Health Organization — BMI classification
- Mifflin-St Jeor equation (BMR/TDEE tools) — Standard resting metabolic rate estimate
- The Daily Tools Methodology
Key points
- Heart Rate Zone Calculator is a free, browser-based calculator that five training zones from max HR.
- Formula: Max HR ≈ 220 − age; zones as percentages of max HR
- Private, browser-only processing
- Related search: heart rate zones
- Related search: max hr