Target Heart Rate Zone Calculator
The Target Heart Rate Zone Calculator estimates the heart-rate range you can use as a guide when exercising. It can help you understand how intensely you are exercising by comparing your heart rate with an estimated maximum heart rate and calculating training zones.
What Is a Target Heart Rate Zone?
A target heart rate zone is a range of heartbeats per minute associated with a particular exercise intensity. Instead of exercising at one exact heart rate, you can use a range to help monitor whether your workout is relatively light, moderate, or vigorous.
Target heart rate zones are estimates. Your actual exercise intensity can also be affected by fitness level, medications, health conditions, temperature, and other factors.
How Does the Target Heart Rate Calculator Work?
Many simple calculators begin by estimating your maximum heart rate using the formula:
Maximum Heart Rate = 220 β Age
For example, if you are 30 years old:
220 β 30 = 190 beats per minute
Your estimated maximum heart rate would therefore be 190 beats per minute. Target zones can then be calculated as percentages of that estimated maximum.
Common Heart Rate Training Zones
| Zone | Approximate Intensity | Percentage of Maximum Heart Rate |
|---|---|---|
| Zone 1 | Very light | 50β60% |
| Zone 2 | Light to moderate | 60β70% |
| Zone 3 | Moderate | 70β80% |
| Zone 4 | Hard | 80β90% |
| Zone 5 | Very hard | 90β100% |
These percentages are commonly used as general training guidelines. Different fitness programs may define zones differently.
Example of a Target Heart Rate Calculation
Suppose a person is 30 years old. Using the basic maximum-heart-rate formula:
220 β 30 = 190 bpm
To estimate a 60β70% target zone:
190 Γ 0.60 = 114 bpm
190 Γ 0.70 = 133 bpm
The estimated Zone 2 range would therefore be approximately 114β133 beats per minute.
Resting Heart Rate and the Karvonen Method
Some heart rate calculators use the Karvonen method, also known as the heart rate reserve method. This approach considers both maximum heart rate and resting heart rate.
The formula is:
Target Heart Rate = Resting Heart Rate + (Heart Rate Reserve Γ Intensity)
Where:
Heart Rate Reserve = Maximum Heart Rate β Resting Heart Rate
For example, if the estimated maximum heart rate is 190 bpm and the resting heart rate is 60 bpm:
190 β 60 = 130 bpm heart rate reserve
At 70% intensity:
60 + (130 Γ 0.70) = 151 bpm
The resulting target heart rate would be approximately 151 bpm using this method.
Why Use Target Heart Rate Zones?
Heart rate zones can provide a simple way to monitor exercise intensity during activities such as walking, running, cycling, swimming, and other aerobic workouts.
- Understand different exercise intensity levels.
- Set a general heart rate range for a workout.
- Monitor effort during aerobic exercise.
- Compare easy and harder training sessions.
- Structure workouts around different intensity levels.
What Is Zone 2 Training?
Zone 2 generally refers to a relatively low-to-moderate exercise intensity, often around 60β70% of estimated maximum heart rate when using a five-zone percentage model.
At this intensity, many people can maintain a conversation while exercising. The exact heart rate associated with Zone 2 can vary depending on the method used to calculate training zones and the individual.
Can Maximum Heart Rate Be Calculated Exactly?
No. Age-based formulas provide estimates rather than an exact measurement of an individual's maximum heart rate. Maximum heart rate can vary considerably between people of the same age.
More individualized methods can use measured exercise data or laboratory testing, but these are not necessary for every recreational exercise program.
Important Note
The Target Heart Rate Zone Calculator provides estimated training ranges and is intended for general informational purposes. It does not diagnose heart health or determine whether a particular exercise intensity is safe for you. If you have a heart condition, symptoms during exercise, or concerns about starting or changing an exercise program, consult a qualified healthcare professional before relying on target heart rate calculations.