Calculate Your Maximum Heart Rate
Enter your age to estimate your maximum heart rate (MHR) and training zones. This tool includes multiple formulas used in exercise science.
Educational tool only. For medical guidance, consult your physician or a qualified exercise professional.
What is maximum heart rate?
Your maximum heart rate is the highest number of beats per minute your heart can reach during all-out effort. It is commonly used to set cardio intensity, build training plans, and estimate effort levels during workouts. While no formula can predict your exact true max for every individual, age-based estimates are practical for most people.
Why use a maximum heart rate calculator?
If you train without structure, it is easy to spend too much time going too hard or not hard enough. A heart rate calculator helps you choose appropriate intensity zones for goals like fat loss, endurance, race performance, or active recovery.
- Beginners can avoid overtraining by staying in manageable zones.
- Endurance athletes can target aerobic development more precisely.
- General fitness users can make treadmill, cycling, and running sessions more effective.
How this calculator estimates your max heart rate
1) Fox formula
220 − age. This is the classic approach and still widely used because it is simple and fast.
2) Tanaka formula
208 − (0.7 × age). This equation is often considered a better population-level estimate for adults.
3) Nes formula
211 − (0.64 × age). Another research-based option that may fit some individuals better.
4) Average method
The calculator can average all three estimates to reduce reliance on one formula. This is a practical choice when you want a balanced estimate.
Understanding training zones
Once your maximum heart rate is estimated, you can use percentage-based zones to guide your workouts.
- 50–60%: Recovery and easy movement.
- 60–70%: Aerobic base and general health.
- 70–80%: Tempo work, improved stamina.
- 80–90%: Hard intervals and performance development.
- 90–100%: Near-max effort; short, intense bursts.
Should you use resting heart rate too?
If you provide resting heart rate, the calculator also displays Karvonen (heart rate reserve) zones. This method personalizes intensity by considering both maximum and resting heart rate:
Target HR = (Max HR − Resting HR) × intensity + Resting HR
For many people, Karvonen zones feel more accurate than simple percentage-of-max zones.
Important limitations
Estimated maximum heart rate is not the same as lab-tested maximum heart rate. Your actual value can be influenced by genetics, medications, training status, heat, stress, hydration, altitude, and sleep quality.
- Some healthy people naturally run higher or lower than formulas predict.
- Heart rate data should be combined with perceived exertion and workout performance.
- If you have a cardiac condition or symptoms, seek medical clearance before intense training.
Practical tips for better results
Use a reliable heart rate monitor
Chest straps are usually more accurate than wrist-based sensors during intervals.
Re-check every few months
Your training zones may shift as fitness improves. Recalculate periodically and adjust your plan.
Match zones to your weekly plan
Most people benefit from spending more time in easy and moderate zones, with limited high-intensity sessions.
Quick FAQ
Is 220 minus age accurate for everyone?
No. It is a rough estimate. Some people can be 10–15 bpm above or below that value.
Can I improve my maximum heart rate?
Maximum heart rate tends to decline with age and is largely genetic. Training usually improves performance at submax efforts, not max HR itself.
What if my measured heart rate exceeds the estimate?
That can happen and does not automatically indicate a problem. Use it as feedback and adjust your zones accordingly.