Heart Rate Zones Calculator
Measure first thing in the morning before getting out of bed.
Warm-up, cool-down, active recovery. Builds aerobic base.
Comfortable pace. Best for fat oxidation and endurance building.
Moderate effort. Improves cardiovascular fitness and efficiency.
Hard effort. Increases lactate threshold and speed endurance.
All-out effort. Short intervals only. Develops peak performance.
Learn more about heart rate zones
Training With Heart Rate Zones
Heart rate zone training is one of the most effective ways to structure your workouts. By training at specific intensities, you target different physiological adaptations — from fat burning and endurance building to speed development and peak performance.
This calculator uses the Karvonen method, which factors in your resting heart rate for more personalized zones compared to simple percentage-of-max calculations. A lower resting heart rate generally indicates better cardiovascular fitness, which shifts your training zones accordingly.
Most people make the mistake of training too hard on easy days and not hard enough on hard days. The 80/20 rule suggests spending about 80% of your training time in Zones 1 and 2 (low intensity) and only 20% in Zones 3-5 (moderate to high intensity). This polarized approach has been shown to produce the best endurance gains.
To measure your resting heart rate accurately, check your pulse first thing in the morning before getting out of bed. Count beats for 60 seconds or use a fitness watch. Track it over several days and use the average. A declining resting heart rate over time is one of the best indicators that your fitness is improving.
Training With Heart Rate Zones
Heart rate zone training is one of the most effective ways to structure your workouts. By training at specific intensities, you target different physiological adaptations — from fat burning and endurance building to speed development and peak performance.
This calculator uses the Karvonen method, which factors in your resting heart rate for more personalized zones compared to simple percentage-of-max calculations. A lower resting heart rate generally indicates better cardiovascular fitness, which shifts your training zones accordingly.
Most people make the mistake of training too hard on easy days and not hard enough on hard days. The 80/20 rule suggests spending about 80% of your training time in Zones 1 and 2 (low intensity) and only 20% in Zones 3-5 (moderate to high intensity). This polarized approach has been shown to produce the best endurance gains.
To measure your resting heart rate accurately, check your pulse first thing in the morning before getting out of bed. Count beats for 60 seconds or use a fitness watch. Track it over several days and use the average. A declining resting heart rate over time is one of the best indicators that your fitness is improving.
This calculator is for educational purposes only and is not medical advice. Results are estimates based on general formulas and may not reflect your individual needs. Consult a healthcare professional before making changes to your diet or exercise routine.