Heart Rate Calculator
Calculate your maximum heart rate, training zones, and personalized targets using proven formulas
Enter your age in years (1-120). Age is the primary factor in estimating maximum heart rate.
Measure your pulse first thing in the morning before getting out of bed. Enables Karvonen formula for personalized zones.
Standard is most common. Tanaka may be more accurate for older adults. Gulati is validated for women.
Your fitness level helps determine which training zone is recommended for you.
If you know your true MHR from a stress test or lab assessment, enter it here to override the formula estimate.
Calculate Your Heart Rate Zones
Enter your age and click Calculate to see your maximum heart rate, training zones, and personalized recommendations.
How to Use the Heart Rate Calculator
Enter Your Age and Gender
Type your age in years and select your gender. Age is the primary factor in all maximum heart rate formulas, and gender determines whether the Gulati formula (designed for women) is applicable.
Add Your Resting Heart Rate (Optional)
For the most accurate results, enter your resting heart rate. Measure it first thing in the morning before getting out of bed by counting your pulse for 60 seconds. This enables the Karvonen formula, which provides personalized training zones.
Choose Your Formula and Fitness Level
Select a maximum heart rate formula (Standard, Tanaka, or Gulati) and your fitness level. If you know your true max heart rate from a stress test, enter it in the override field to skip the formula estimate entirely.
Review Your Training Zones and Recommendations
Click Calculate to see your five heart rate training zones with BPM ranges, the fat burn zone highlight, AHA intensity classification, formula comparison table, and a personalized training recommendation based on your fitness level.
Frequently Asked Questions
How do I find my resting heart rate?
The most accurate way to measure your resting heart rate is first thing in the morning before getting out of bed. Place your index and middle fingers on the inside of your wrist (radial artery) or on the side of your neck (carotid artery). Count the beats for a full 60 seconds, or count for 15 seconds and multiply by four. Take this measurement on three consecutive mornings and average the results for the most reliable number. A typical resting heart rate for adults ranges from 60 to 100 bpm, though well-trained athletes may have resting rates as low as 40 to 50 bpm. Factors like caffeine, stress, medications, and illness can temporarily elevate your resting heart rate.
Which maximum heart rate formula should I use?
The Standard formula (220 minus age) is the most widely recognized and works well for most adults aged 20 to 50. The Tanaka formula (208 minus 0.7 times age) was developed from a meta-analysis of 351 studies and may provide better estimates for people over 40, as the standard formula tends to underestimate MHR in older adults. The Gulati formula (206 minus 0.88 times age) was derived from a landmark study of over 5,000 asymptomatic women and is specifically validated for female physiology. If accuracy is critical for your training, consider a supervised maximal exercise stress test with a cardiologist or exercise physiologist to determine your true maximum heart rate.
What is the best heart rate zone for burning fat?
Zone 2 (60-70% of your maximum heart rate) is commonly called the fat burn zone because your body derives the highest percentage of energy from fat at this intensity. During low-to-moderate effort, your muscles rely more heavily on fat oxidation for fuel. However, it is important to understand that higher-intensity zones burn more total calories per minute, even though a smaller percentage comes from fat. For weight loss, the most effective approach is a combination of Zone 2 training for longer durations (45-60 minutes) to build aerobic capacity and fat-burning efficiency, along with occasional higher-intensity sessions in Zones 3-4 to boost overall calorie expenditure and metabolic rate.
What is the Karvonen formula and why is it more accurate?
The Karvonen formula calculates your target heart rate using heart rate reserve (HRR) rather than just a percentage of maximum heart rate. The formula is: Target HR = ((MHR - Resting HR) x intensity percentage) + Resting HR. This approach is more personalized because it accounts for your current fitness level through your resting heart rate. Two people of the same age might have the same estimated MHR, but if one has a resting heart rate of 55 bpm and the other 85 bpm, their optimal training intensities will differ significantly. The Karvonen method produces higher target heart rates than the simple percentage method for most people, resulting in zones that better reflect true physiological effort.
Is it safe to exercise in Zone 5 (90-100% MHR)?
Zone 5 training is safe for healthy, well-conditioned individuals when done in short intervals with proper warm-up and recovery. This zone represents near-maximum effort and is used for sprint intervals, HIIT workouts, and competitive racing. Typical Zone 5 intervals last 30 seconds to 2 minutes, followed by equal or longer recovery periods. However, beginners, older adults, and anyone with cardiovascular conditions should avoid Zone 5 without medical clearance. Signs to stop exercising immediately include chest pain, dizziness, severe shortness of breath, or irregular heartbeat. Always build a solid aerobic base in Zones 2-3 before attempting high-intensity Zone 5 training.