Heart Rate Calculator | Target Heart Rate & Training Zones

📖 How to Use This Heart Rate Calculator

Enter your age - Your age is used to calculate your maximum heart rate.

Enter your resting heart rate - Measure your pulse first thing in the morning for 60 seconds.

Choose your formula - Standard formula (220 - age) or more accurate Karvonen formula.

Click "Calculate Heart Rate Zones" - Get your maximum heart rate and all 5 training zones.

❤️ Understanding Heart Rate Zones

Heart rate zones are ranges of heartbeats per minute that correspond to different exercise intensities. Training in specific zones helps you achieve different fitness goals - from fat burning to improving cardiovascular endurance.

Zone 1 (50-60%): Very Light - Warm-up, cool-down, recovery. Improves overall health.
Zone 2 (60-70%): Light / Fat Burn - 🔥 Optimal for fat burning. Builds endurance.
Zone 3 (70-80%): Moderate / Cardio - Improves cardiovascular fitness and stamina.
Zone 4 (80-90%): Hard / Anaerobic - Increases speed, power, and lactate threshold.
Zone 5 (90-100%): Maximum Effort - Short bursts only, for elite athletes.

🧮 Heart Rate Formulas

Standard Formula:
Max HR = 220 - Age
Target HR = Max HR × Intensity%

Karvonen Formula (more accurate):
Target HR = ((Max HR - Resting HR) × Intensity%) + Resting HR

💡 How to Measure Your Resting Heart Rate

Measure first thing in the morning before getting out of bed
Place two fingers on your wrist (radial artery) or neck (carotid artery)
Count beats for 60 seconds (use a timer)
A normal resting heart rate is 60-100 bpm (athletes may be 40-60 bpm)
Take measurements for 3-5 days and average for best results

🏃‍♂️ Using Heart Rate Zones for Training

Weight Loss: Spend 30-60 minutes in Zone 2 (60-70%), 3-5 times per week
Cardiovascular Health: Mix Zone 2 and Zone 3 training
Endurance Building: Long sessions in Zone 2 (60-90 minutes)
Performance/Speed: Interval training alternating between Zone 4 and Zone 2
Recovery: Zone 1 activity on rest days

❓ Frequently Asked Questions (FAQ)

What is a normal maximum heart rate?

Maximum heart rate varies by age. The standard formula 220 - Age provides a good estimate. For a 30-year-old, max HR is about 190 bpm. Fit individuals may have slightly different values.

Which heart rate formula is more accurate?

The Karvonen formula is more accurate because it factors in your resting heart rate, which reflects your fitness level. For beginners, the standard formula (220 - Age) is a good starting point.

What heart rate zone is best for weight loss?

Zone 2 (60-70% of Max HR) is the "fat burning zone" where your body uses stored fat as primary fuel. However, higher intensity zones burn more total calories, so a mix of zones is most effective.

How do I know if I'm exercising at the right intensity?

Use the "talk test" - in moderate intensity (Zone 2-3), you can talk but not sing. In vigorous intensity (Zone 4), you can only say a few words. A heart rate monitor provides the most accurate measurement.

Why does my heart rate stay high after exercise?

Your heart rate remains elevated after exercise as your body cools down and recovers. Faster recovery (heart rate dropping quickly) indicates better cardiovascular fitness.

Is it dangerous to exercise at maximum heart rate?

Training at maximum heart rate (Zone 5) should only be done in short bursts (30-60 seconds) by experienced athletes. Beginners should stay in Zones 1-3. Always consult a doctor before high-intensity training.