Heart Rate Zone Calculator
Training zones are set as a percentage of your maximum heart rate, estimated as 220 minus your age. Enter your age and the intensity you want.
Calculate heart rate zone
Fill in the fields and select Calculate.
What you'll need
To use the heart rate zone calculator, have these figures ready:
- Age — for example, 30.
- Intensity — for example, 70.
The calculator then returns the target heart rate the moment you press calculate.
How it works
Target heart rate = (220 − age) × intensity ÷ 100
You enter the age and intensity, and the calculator returns the target heart rate using the formula above.
When to Use
Use the heart rate zone calculator to determine your training zones based on your maximum heart rate. Training in the right heart rate zone ensures you are getting the specific physiological adaptations you want — whether that is fat burning, aerobic endurance, lactate threshold improvement, or VO2 max development. Coaches and athletes use heart rate zones to structure training programmes.
What the result tells you
Training zones let you target the right intensity for a goal, from easy fat burning work to hard threshold efforts. The 220 minus age estimate is convenient but rough, often out by ten beats either way, so a maximum measured in a hard test is more reliable. Treat the zones as a starting guide and adjust them to how the effort actually feels.
Benchmarks & Interpretation
Here is how typical results are categorized and interpreted:
| Value / Range | Rating | Description |
|---|---|---|
| Zone 1 (50-60% MHR) | Recovery | Very light effort. Used for warm-ups, cool-downs, and active recovery. |
| Zone 2 (60-70% MHR) | Endurance | Easy effort. The foundation of aerobic training. You can hold a conversation. |
| Zone 3 (70-80% MHR) | Tempo | Moderate effort. Improves aerobic capacity and efficiency. |
| Zone 4 (80-90% MHR) | Threshold | Hard effort. Improves lactate threshold and race pace fitness. |
| Zone 5 (90-100% MHR) | Maximum | Maximum effort. Intervals and sprints. Improves VO2 max and speed. |
Pro Tips & Advice
Most training should be in Zone 2 (about 80% of your total training volume). This builds the aerobic base that supports all other types of training. Hard sessions (Zone 4-5) should be truly hard but limited to 2-3 times per week with adequate recovery between them. The most common training mistake is spending too much time in Zone 3 — too hard for recovery but not hard enough for maximum adaptation. Use a heart rate monitor during training to ensure you are in the right zone.
Step by step
- Enter the age.
- Enter the intensity (%).
- Select Calculate to read the target heart rate.
Worked example
For a 30 year old training at 70 percent, max heart rate is 190 and the target is 190 × 0.70, about 133 beats a minute.
Frequently asked questions
How is the heart rate zone worked out?
Target heart rate = (220 − age) × intensity ÷ 100. Training zones are set as a percentage of your maximum heart rate, estimated as 220 minus your age. Enter your age and…
Is 220 minus age exact?
No. It is a population estimate and can be off by ten beats or more for an individual. A measured maximum from a test is more accurate.
How do I estimate my maximum heart rate?
The simplest formula is 220 minus your age, but this can be off by 10-15 beats. A more accurate approach is the Tanaka formula: 208 - (0.7 × age). The most accurate method is a graded exercise test performed in a lab.
Is resting heart rate important?
Yes. A lower resting heart rate generally indicates better cardiovascular fitness. Well-trained endurance athletes often have resting heart rates of 40-60 bpm, while sedentary adults average 60-100 bpm. Tracking resting heart rate over time is a simple way to monitor fitness progress.
How accurate is the Heart Rate Zone Calculator?
The tool applies the standard formula exactly, so the result is only as accurate as the figures you enter. Double check your inputs, since a wrong number going in gives a wrong number coming out.
Is the Heart Rate Zone Calculator free to use?
Yes. Every tool on GamersZone is free, with no account and no limit on how many times you calculate. The maths runs in your browser, so the numbers you enter are never sent to a server or stored.
How we calculate this
This tool applies the standard formula shown above. The calculation runs entirely in your browser, so the figures you enter are never stored.