Target Heart Rate Calculator
Calculate your personalized heart rate training zones for optimal workout results. Find your target heart rate for fat burning, cardiovascular fitness, or peak performance based on age and resting heart rate.
Measure first thing in morning before getting up. Used for more accurate Karvonen formula.
What is target heart rate and why does it matter?
Target heart rate (THR) is the ideal heart rate range during exercise for different fitness goals. Training zones: Fat burn (60-70% max HR) uses fat as primary fuel, builds aerobic base. Cardio (70-85% max HR) improves cardiovascular fitness, burns more total calories. Peak (85-95% max HR) increases performance, VO2 max, anaerobic capacity. Benefits of training in zones: Maximizes workout efficiency, prevents overtraining, ensures adequate intensity, tracks fitness progress. Most people should spend majority of time in cardio zone (70-85%).
How do I calculate my maximum heart rate?
Common formulas: Simple: 220 - age (most popular but least accurate). Tanaka: 208 - (0.7 × age) - more accurate for all ages. Gulati (women): 206 - (0.88 × age) - specific for females. Most accurate: Lab VO2 max test or field test (all-out effort for 3 minutes, measure peak HR). Why estimates vary: Genetics, fitness level, medications (beta blockers lower HR). Example: 30-year-old - Simple = 190 bpm, Tanaka = 187 bpm. Use Tanaka formula for better accuracy. Monitor actual HR during hard efforts to refine your true max.
What are the different heart rate training zones?
Zone 1 (50-60%): Very light, recovery, warm-up. Benefits: Active recovery, beginner base building. Zone 2 (60-70%): Light, fat burning. Benefits: Improves fat metabolism, builds aerobic endurance, can maintain for hours. Zone 3 (70-80%): Moderate, aerobic. Benefits: Improves cardiovascular fitness, efficient calorie burn. Zone 4 (80-90%): Hard, threshold. Benefits: Increases lactate threshold, improves speed endurance. Zone 5 (90-100%): Maximum, anaerobic. Benefits: Increases VO2 max, power, speed. Most effective: 80% time in Zones 2-3, 20% in Zones 4-5. Beginners start Zone 2-3.
How do I measure my heart rate during exercise?
Methods ranked by accuracy: Chest strap monitors: Most accurate (±1 bpm), measures electrical signals, best for interval training. Optical wrist monitors (Fitbit, Apple Watch): Good accuracy at steady state (±5 bpm), less accurate during intervals or strength training. Fitness machine sensors: Moderate accuracy (±10 bpm), must maintain grip. Manual pulse check: Count for 15 sec × 4, difficult during exercise, interrupts workout. Tips: Wet chest strap for better contact, wear wrist monitors snug but not tight, check HR after 2-3 min steady effort for accurate reading.
How does fitness level affect heart rate?
Better fitness = lower resting HR and faster recovery. Resting HR: Untrained = 70-80 bpm, Trained = 50-60 bpm, Elite athletes = 40-50 bpm. Exercise HR: Fit people maintain lower HR at same intensity (more efficient heart pumps more blood per beat). Recovery: Fit people return to resting HR faster after exercise (1-2 min vs 5+ min for untrained). HR variability (HRV): Higher HRV = better fitness, recovery, stress management. Track resting HR: Decreasing trend over weeks/months = improving fitness. Sudden increase = overtraining, illness, stress.