Target Heart Rate Calculator
Use this tool to estimate your ideal heart rate range for cardio training. You can use the basic method (percent of max heart rate) or the Karvonen method (includes resting heart rate).
Educational use only. This is not medical advice.
What is a target heart rate?
Your target heart rate is the beats-per-minute (bpm) range that helps you train at the intensity you want. Staying in a target zone makes cardio sessions more purposeful: easier days stay easy, and harder days become truly challenging.
Most people use heart rate zones for activities like running, cycling, rowing, brisk walking, interval workouts, and conditioning sessions. A simple target zone is often enough to improve endurance, support fat loss goals, and build cardiovascular fitness.
How this calculator works
1) Basic method (% of max HR)
This method estimates your maximum heart rate using the common formula:
Maximum HR = 220 − age
Then it multiplies that number by your selected intensity percentages (for example, 50% to 85%). It is fast and widely used.
2) Karvonen method (heart rate reserve)
The Karvonen approach includes your resting heart rate, which can make the result more individualized.
Target HR = ((Max HR − Resting HR) × intensity) + Resting HR
If you know your resting pulse (taken calmly in the morning), this method is often a better guide than the basic formula alone.
Typical training zones
- 50–60% (Very light): Warm-up, recovery, easy movement.
- 60–70% (Light): Aerobic base building, longer steady sessions.
- 70–80% (Moderate): Improved cardiovascular fitness and stamina.
- 80–90% (Hard): Performance training, intervals, tempo efforts.
- 90–95% (Very hard): Short maximal efforts for advanced athletes.
How to use your numbers in real workouts
Steady cardio day
Stay around the lower-middle zone (for example 60–75%). You should be breathing harder than rest, but still somewhat in control.
Interval day
Alternate harder work intervals near the upper zone (80–90%) with easy recovery segments (50–65%). This improves speed and conditioning efficiently.
Recovery day
Keep heart rate low (50–60%). This helps circulation and recovery without adding excessive fatigue.
Tips for better accuracy
- Use a chest strap or reliable wearable for heart rate tracking.
- Measure resting heart rate after waking, before caffeine.
- Recheck your zones every few months as fitness changes.
- Use effort and breathing as a backup signal, not just the number.
Important safety note
Heart rate formulas are estimates, not perfect diagnostics. Medications, stress, sleep, heat, hydration, and fitness level can all shift your real-world numbers. If you have heart conditions, symptoms like chest pain or dizziness, or are new to exercise after a long break, consult a healthcare professional before starting intense training.
Bottom line
If you want to find target heart rate zones quickly, this calculator gives you a practical starting point. Use it consistently, adjust based on how your body responds, and pair it with good sleep, smart progression, and recovery. Over time, your workouts become safer, more structured, and much more effective.