Heart Rate Zones Calculator
Calculate your heart rate training zones based on age, resting heart rate, and fitness goal. This tool helps estimate Zone 1 to Zone 5 for walking, running, cycling, and cardio training.
Karvonen uses resting heart rate and may give a more personalized estimate.
Add your age and resting heart rate to calculate your training zones.
What Is a Heart Rate Zones Calculator?
A Heart Rate Zones Calculator estimates your training intensity zones using your age and resting heart rate. These zones can help you plan easy cardio, Zone 2 training, tempo workouts, and higher-intensity sessions.
Heart Rate Zones Calculator Formula
This calculator estimates maximum heart rate using 220 − age. For the Karvonen method, it also uses heart rate reserve, which is maximum heart rate minus resting heart rate.
| Method | Formula |
|---|---|
| Max Heart Rate | 220 − age |
| Heart Rate Reserve | Max heart rate − resting heart rate |
| Karvonen Target | (Heart rate reserve × intensity %) + resting heart rate |
Heart Rate Zone Chart
| Zone | Intensity | Common Use |
|---|---|---|
| Zone 1 | 50–60% | Warm-up, recovery, easy movement |
| Zone 2 | 60–70% | Fat-burning cardio, endurance base, easier aerobic training |
| Zone 3 | 70–80% | Tempo pace, moderate-hard training |
| Zone 4 | 80–90% | Hard intervals, performance work |
| Zone 5 | 90–100% | Maximum effort, short intense intervals |
What Is Zone 2 Cardio?
Zone 2 cardio is a lower-to-moderate intensity training zone where you can usually speak in short sentences while exercising. Many people use Zone 2 for walking, cycling, jogging, rowing, or steady cardio because it is easier to recover from compared with high-intensity training.
Fat Burning Heart Rate Zone
The so-called fat burning zone is commonly linked with Zone 2. However, fat loss still depends on overall calorie balance, food intake, sleep, and consistency. Heart rate zones can help guide training intensity, but they do not replace a complete weight management plan.
How to Measure Resting Heart Rate
Resting heart rate is usually measured when you are calm, relaxed, and not exercising. Many people measure it in the morning before getting out of bed. Fitness watches can estimate it automatically, but manual pulse counting can also work.
Limitations of This Calculator
This tool gives an estimate. Real heart rate response can vary based on fitness level, medication, caffeine, stress, heat, hydration, sleep, and health conditions. Use it as a starting point, not a medical test.
Heart Rate Zones FAQ
What is the best heart rate zone for fat loss?
Zone 2 is often used for easier fat-burning cardio, but fat loss still depends on calorie balance and consistency.
Is Zone 2 good for beginners?
Yes, Zone 2 is often beginner-friendly because the intensity is easier to maintain and recover from.
Which method is better, Karvonen or max heart rate?
Karvonen includes resting heart rate, so it can feel more personalized. Max heart rate percentage is simpler.
Can heart rate zones be wrong?
Yes. They are estimates. Fitness watches, formulas, stress, heat, and medications can affect heart rate readings.