Target Heart Rate Calculator: Find Your Ideal Training Zones
Personalized zones from Haskell & Fox, Tanaka, or Nes MHR formulas (or measured max HR). Use % max HR or Karvonen — plus Borg 6–20 / CR10 for RPE-linked targets.
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Knowing your target heart rate is one of the most effective ways to train smarter, burn fat more efficiently, improve endurance, and avoid overtraining.
Our Target Heart Rate Calculator gives you personalized heart rate zones using multiple scientifically validated formulas, including the popular Haskell & Fox, Tanaka, and Nes methods. Whether you're a beginner, serious athlete, or training for military PT, this tool helps you stay in the right intensity zone.
How Our Target Heart Rate Calculator Works
We offer flexible and accurate calculations based on your preferences:
1. Maximum Heart Rate (MHR) Calculation
You can choose from three proven formulas:
- Haskell & Fox (1971): MHR = 220 − Age (most commonly used)
- Tanaka et al. (2001): MHR = 208 − (0.7 × Age) (often considered more accurate)
- Nes et al. (2013): MHR = 211 − (0.64 × Age) (recent research-based)
You can also override with your personally measured Max HR for the highest accuracy.
2. Training Zone Methods
- % of Maximum HR – Simple and widely used
- Karvonen Method (Heart Rate Reserve) – More precise as it considers your resting heart rate
3. Borg RPE Scale Integration
Enter your desired Rating of Perceived Exertion (Borg 6–20 or CR10 scale) to get a recommended target heart rate.
Heart Rate Training Zones
| Zone | Intensity | % of Max HR | % of Heart Rate Reserve (Karvonen) | Best For |
|---|---|---|---|---|
| 1 | Very Light | 50–60% | 50–60% | Warm-up, Recovery |
| 2 | Light / Moderate | 60–70% | 60–70% | Fat Burning, Endurance Base |
| 3 | Moderate | 70–80% | 70–80% | Aerobic Fitness |
| 4 | Hard | 80–90% | 80–90% | Anaerobic Threshold |
| 5 | Maximum | 90–100% | 90–100% | Peak Performance, Speed |
Zone 2 is especially popular in 2026 for sustainable fat loss and building a strong aerobic base.
Why Use This Target Heart Rate Calculator?
- Compare multiple Max HR formulas for better accuracy
- Use Karvonen method for personalized results
- Get target heart rates based on how hard you feel (RPE)
- Ideal for runners, cyclists, athletes, and military training
- Helps you train in the right zone for your specific goal
Pro Tips for Using Heart Rate Zones
- Most people should spend 70–80% of their training time in Zone 2
- Use a chest strap heart rate monitor for the best accuracy
- Recalculate your zones every 3–6 months as your fitness improves
- Combine with our Fitness Age Calculator to track cardiovascular progress
Disclaimer: Heart rate calculations are estimates. Individual responses vary. This tool is for educational purposes only and should not replace professional medical advice. Consult a doctor before beginning any intense training program.
Ready to train smarter? Calculate your personal target heart rate zones using the tool above and take your training to the next level.