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Find your optimal heart rate zones for exercise to maximize your workout effectiveness and safety.
Enter your information to calculate target heart rate zones.
190 bpm
Light Intensity (50-60%)
130 - 142 bpm
Easy, conversational pace. Good for recovery and building aerobic base.
Moderate Intensity (60-70%)
142 - 154 bpm
Aerobic zone. Comfortable but with some effort. Improves cardiovascular fitness.
Vigorous Intensity (70-80%)
154 - 166 bpm
Hard effort. Improves VO2 max and lactate threshold.
High Intensity (80-90%)
166 - 178 bpm
Very hard effort. For advanced training and interval sessions.
Maximum (90-100%)
178 - 190 bpm
Maximum effort. Used for short bursts in interval training only.
Everything you need to know
Target heart rate is the number of beats per minute (BPM) your heart should reach during exercise to achieve specific fitness benefits. Different exercise intensities produce different cardiovascular adaptations. Training at the right heart rate zone ensures you're working hard enough to make progress without overtraining or training inefficiently.
Your heart rate zones are determined by your maximum heart rate (MHR) — the highest number of beats per minute your heart can achieve during maximum exertion. From this maximum, different intensity zones are calculated as percentages, each serving a different training purpose.
Our target heart rate calculator determines your personalized workout zones:
Enter Your Age
Enter Your Resting Heart Rate (Optional)
Select Your Training Goal
View Your Heart Rate Zones
The most common method for estimating maximum heart rate:
Formula:
Estimated Maximum Heart Rate = 220 - Age
Example: 30-year-old
Limitations:
More accurate method using resting heart rate:
Step 1: Calculate Heart Rate Reserve
HRR = Maximum HR - Resting HR
Step 2: Calculate Target Zone
Target HR = (HRR × Intensity %) + Resting HR
Example: 30-year-old with 60 BPM resting heart rate
This method is significantly more accurate than the age-predicted formula alone.
Heart rate training divides intensity into distinct zones, each with specific benefits:
Intensity Level: Very Light
Example (30-year-old, Max HR 190):
Training benefits:
Best used for:
Time per week: 20-30% of total training
Intensity Level: Light to Moderate
Example (30-year-old, Max HR 190):
Training benefits:
Best used for:
Time per week: 40-50% of total training
Why this zone for fat loss: At 60-70% intensity, your body preferentially uses fat for fuel (about 50-60% of calories from fat vs 20-30% in higher zones). A 60-minute Zone 2 workout burns significant fat calories while being sustainable.
Intensity Level: Moderate to Moderately Hard
Example (30-year-old, Max HR 190):
Training benefits:
Best used for:
Time per week: 15-20% of total training
Why it's called "sweet spot": This zone offers maximum aerobic adaptation with minimal injury risk—the most efficient training zone for aerobic improvement without the joint stress of high-intensity work.
Intensity Level: Hard
Example (30-year-old, Max HR 190):
Training benefits:
Best used for:
Time per week: 5-10% of total training
Warning: Higher injury risk; requires good fitness base before attempting.
Intensity Level: Maximum Effort
Example (30-year-old, Max HR 190):
Training benefits:
Best used for:
Time per week: 2-5% of total training
Warning: Requires full recovery; risk of overtraining is high. Only use after adequate base training.
| Goal | Zone 2 | Zone 3 | Zone 4 | Zone 5 |
|---|---|---|---|---|
| Fat Loss | 60-70% | 20-30% | 5-10% | 0-5% |
| General Fitness | 50-60% | 25-35% | 10-15% | 5-10% |
| Aerobic Base | 70-80% | 15-20% | 5-10% | 0-5% |
| Performance | 40-50% | 20-30% | 20-30% | 10-20% |
| Endurance | 80-90% | 10-20% | 0-5% | 0% |
| Day | Zone | Duration | Purpose |
|---|---|---|---|
| Monday | Zone 2 | 45 min | Steady cardio |
| Tuesday | Zone 3 | 30 min | Tempo run |
| Wednesday | Zone 1 | 30 min | Easy recovery |
| Thursday | Zone 4 | 20 min (4×5 min hard) | VO2 intervals |
| Friday | Zone 2 | 60 min | Long, easy session |
| Saturday | Zone 3 | 35 min | Threshold work |
| Sunday | Zone 1 | 20-30 min | Light recovery walk |
Total: ~220 minutes per week, ~70% in Zone 2 (fat loss zone)
Heart Rate Monitor (Most Accurate)
Manual Pulse Check
Perceived Exertion + Heart Rate
If heart rate is too low:
If heart rate is too high:
Profile: 40-year-old, relatively untrained, wants to lose weight sustainably
Zone setup (Resting HR 75 BPM):
Weekly plan:
Profile: Intermediate runner, wants to improve race pace
Zone setup (Resting HR 58 BPM):
Weekly plan:
Scenario: 35-year-old male, resting heart rate 60 bpm, moderate-intensity exercise goal (70% effort)
Karvonen Formula Calculation:
Zone Breakdown (using Karvonen for this person):
Interpretation: For moderate-intensity exercise, maintaining a heart rate of 147-148 bpm provides effective cardiovascular benefits while remaining sustainable for 30+ minutes.
The best way is a max HR test: warm up, then perform 3-5 minutes of all-out effort (running, cycling, rowing) while monitoring HR. Your peak HR during this effort is your actual max HR. Subtract 10 BPM from the peak for safety during future training.
Common reasons:
If consistently elevated, take an easy week and reassess.
Yes, but slow. For faster adaptation, include some Zone 3-4 work (10-20% of training). However, Zone 2 base building is sustainable long-term and important for health.
Generally yes. Athletes often have resting HR of 40-50 BPM (excellent aerobic fitness). However, if your resting HR suddenly drops dramatically, it could indicate overtraining.
Not recommended. High-intensity zones create significant fatigue and injury risk. Training should follow the 80/20 rule: ~80% low-intensity (Zone 1-2), ~20% moderate-high intensity (Zone 3-5).
Should I stay within my target heart rate zone for all workouts? No. Different intensities have different purposes. Vary intensity from easy recovery to high-intensity intervals for optimal fitness.
No. Different intensities have different purposes. Vary intensity from easy recovery to high-intensity intervals for optimal fitness.
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This calculator is provided for educational and informational purposes only. It is not medical, fitness, nutritional, or professional advice. Results are estimates based on the assumptions and inputs you provide.
Actual results may differ significantly due to:
Do not rely on this calculator for:
Before making any health or fitness decisions, consult with:
Past performance and estimates do not guarantee future results. Always verify important information independently and consult qualified professionals for your individual circumstances.